Описание технических компонент Acura TLX от 14г.

Sergious

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TLX 2.4
Приветствую, коллеги.
Те владельцы, кто постоянно тусует на drive2, может уже успели ознакомиться с данными материалами.
Для остальных позволю себе выложить здесь мои блоги (если это не идет вразрез с правилами форума):
https://www.drive2.ru/l/8973484/ Первая часть
https://www.drive2.ru/l/8973669/ Вторая часть
https://www.drive2.ru/l/8982915/ Третья часть
https://www.drive2.ru/l/8983082/ Четвертая часть

Вкратце - я собрал воедино технические спеки, описание опций, технологий и фич ТЛХ с оффсайта Акуры США. Не все, а заслуживающие, на мой взгляд, интерес. В итоге материала набралось много, а в связи с ограничением на размер поста, мне пришлось разбить все на 4 части и скомпоновать по отдельным топикам (кузов, сейфти, двиг и т.д).
Внимание! Материал на английском, поэтому либо fluent-native, либо google translater )))

ПС: попадаются действительно интересные факты. Для себя, например, открыл, что у нас капот, усилители бамперов и часть подрамника сделаны из алюминия. Или что система PAWS работает не полько в поворотах и при торможении, но и в условиях сильного бокового ветра на трассе или при попадании авто на разнородные поверхности для стабилизации кузова...
 

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Часть 1

Комрады, читая на досуге оффсайт акуры США, наткнулся на релизы с полным перечнем и детальным описанием применяемых на наших авто технологий.
Инфы очень много, поэтому пришлось опустить часть общеизвестной информации и оставить только технически интересные детали. Извиняюсь за "многобукф", но посты в бортжурнале имеют ограничения на количество символов. Пришлось разбить на топики по узлам и агрегатам авто.
Попытался собрать и причесать под наши реалии все воедино. Если туго с англ, то удобно копипастить в переводчик отсюда.

Intro
The 2015 Acura TLX is an all-new midsize sports sedan, the successor to the TL, and the third vehicle in Acura's re-envisioned performance-luxury sedan lineup, positioned between the ILX entry-luxury sedan and the RLX flagship Acura sedan.
Acura's signature Jewel Eye™ LED headlights, standard on all models, lend the TLX an advanced and bright-eyed appearance while producing superior down-the-road illumination. Its LED lighting theme carries through to the LED-accented side mirrors, LED taillights and LED license plate illumination.

Interior
GPS-Linked, Dual-Zone Automatic Climate Control
The TLX has a GPS-linked (when equipped with navigation system) temperature control, dual-zone automatic climate control system that lets the driver and front passenger set temperatures to their individual liking.
To operate the HVAC system, easy-to-read buttons and controls are positioned within convenient reach. The HVAC system can also be controlled by voice command, and additional custom settings can be accessed through the 7-inch On-Demand Multi-Use Display™ interface. The climate control system's control logic is designed to provide smooth operation with subtle changes in airflow.
With its position-sensing ability, the available GPS navigation system contributes to overall passenger comfort with a 3D solar sensing feature. Based on continuously updated vehicle position information, the navigation system determines the position of the sun relative to the driver and passenger. Combining this information with input from a solar sensor located on top of the instrument panel, the climate control system automatically adjusts the temperature from side to side as needed to compensate for asymmetrical solar heating. Further, on the Advance Package, the heated and ventilated front seats are electronically linked to the climate control system.
Siri™ Eyes Free
Siri™ Eyes Free is standard on the TLX. When the TLX's Bluetooth® HandsFreeLink® system is paired with a compatible iPhone, Siri Eyes Free allows you to use many of the features of Siri without removing your hands from the steering wheel. A push of approximately two seconds on the steering wheel-mounted "talk" button activates Siri in the TLX. After the Siri chime sounds, the driver can ask a question, set up a calendar entry and more. Siri offers a wide range of capabilities including sending and reading aloud text and email messages, setting alarms and reminders, checking the weather, posting to social media sites and much more. Siri can also find a point of interest, then provide turn-by-turn audio directions when the audio system is set to Bluetooth® audio or iPod mode. The system switches automatically to Bluetooth audio when playing a song or artist.
Acura/ELS Studio® 10-Speaker Premium Audio
The TLX Technology and Advance Packages feature the Acura/ELS Studio® Premium Audio System, engineered specifically for the TLX by legendary recording engineer Elliot Scheiner to recreate the emotional experience you feel when you enjoy a live performance. The system features high power amplification (490W peak output) and advanced speaker technology. It includes a single-disc CD player, AM/FM/HD/XM/HDD and delivers accurate, well-balanced sound throughout the TLX cabin.
The system's 10 speakers are precisely located throughout the cabin to optimize the listening experience. A pair of ELS tweeters are positioned near the A-pillars, and an ELS 3.1-inch driver is located high in the center of the instrument panel. A total of four 6.7-inch ELS speakers are placed in the front doors and on either side of the rear parcel shelf. Each rear door has a 3.1-inch ELS driver and an 8-inch subwoofer is located in the center of the rear deck.
Hard Disk Drive (HDD) Audio
TECH and ADV TLX audio systems feature a Hard Disk Drive (HDD) that can copy music tracks from pre-recorded CDs, enabling customers to store many CDs worth of music on-board for easy access. The system will not copy music from burned CDs or from USB flash drives. The audio system in the TLX and TLX V-6 offers 15GB of storage space. Based on music files measuring an average size of 4.2MB per song at a 128kbps bit rate, approximately 3,500 songs can be loaded into the 15GB system (approximately 175 CDs).
The HDD-based system records music at 6-times that of the original music track time. Two recording quality settings (192 kbps or 128 kbps) are available. The automatic-recording default setting can be changed to manual if desired.
The audio system can display information about the music tracks, such as artist names and song titles using the Gracenote® database in the system software. This database can be periodically updated to reflect newly released music. Gracenote updates can be downloaded by TLX owners at automobiles.acura.com in the Ownerlink section (up to four updates per year maximum). The updates can then be loaded onto a CD-R or onto a USB thumb drive, which in turn can be used to update the TLX audio system. Even without a Gracenote update, newly released audio tracks will play on the sound system, without accompanying text information on genre, artist, album name and track name.
Acura Navigation System
The TLX's available Acura Satellite-Linked Navigation System uses GPS technology and a 100-GB hard-disk drive based (HDD) system to provide drivers with turn-by-turn guidance to their chosen destination.
The TLX navigation system features an 8-inch high-resolution WVGA (800x480 pixel) backlit color display that takes the place of the audio/information display in non-navigation models.
The Acura Navigation System uses Global Positioning Satellites (GPS) in combination with detailed information from the vehicle's mapping system to pinpoint its location and to provide a host of useful mapping and route guidance features. The antenna can utilize up to 12 satellites from a network of 24 global positioning satellites. If the antenna is obstructed by a tunnel, a parking garage or a tall building, an internal gyroscopic system and a speed sensor track the location of the vehicle so that the map information remains current and reliable. The vehicle clock is independently controlled by GPS data, so when time zones are crossed while driving, the clock will automatically set itself to the current time.
Active Noise Control (ANC) and Active Sound Control (ASC)
Key contributors to the TLX's quiet, refined interior are Active Noise Control (ANC) and Active Sound Control (ASC). The two systems are comprised of dual overhead microphones, an ANC/ASC electronic processor, and the audio system's speakers. ASC/ANC operates whenever the engine is running, even if the audio system is turned off.
ANC is designed to reduce low frequency sound in the cabin caused mainly by the roughness of the road surface. The overhead microphones pick up sound waves and send them to the ANC/ASC processor, which creates and sends a precisely timed "reverse phase" audio signal to a special amplifier. In turn, the amplifier drives the door speakers to cancel the original noise signal.
ASC is a related technology designed to improve the engine sound quality by making the sound pressure level more linear as the engine revs increase. Typically, engine noise doesn't increase in a linear way with rising revs; instead there can be many resonances that create peaks and valleys in the sound pressure level and an uneven sound. ASC helps smooth out the engine sound by creating a same-phase or reverse-phase sound signal as needed and sending it to the speakers. Though the system offers benefits from idle to redline, it makes the largest difference in the range between 1400 and 2400 rpm (V6) and 1000 and 1800 rpm (4-cyl.), where it lowers the sound pressure level with a reverse-phase audio signal.
ASC is part of the Integrated Dynamics System (IDS). When the IDS is in ECON or Normal mode, the ASC system is tuned for a smooth, unobtrusive engine sound. When the IDS is switched to Sport or Sport+, the TLX's interior engine sound takes on a more aggressive note.
Smart Entry Keyless Access System
The TLX features Acura's Smart Entry with Push Button Start. The Smart Entry system lets the TLX owner gain access to the vehicle without having to operate the key fob or conventional key. The Smart Entry remote has a unique digital identity and the TLX can be unlocked when the driver grabs one of the front door handles while the remote is in his/her possession. When carrying the fob (or if all doors are unlocked), the trunk can be opened by pressing a button located on the TLX's rear fascia.
Once the driver has opened the door and is seated, the Smart Entry system allows the TLX to be started by pushing the Engine Start/Stop button positioned on the instrument panel. When leaving the car, a press of the soft-touch button on the exterior door handle locks all the doors. Alternatively, pressing the Lock button on the Smart Entry remote will also simultaneously lock all doors.
Smart Entry also features a unique "quick vent" feature. When the operator depresses the "unlock" button on the keyless remote for two seconds after unlocking the doors, the system lowers all four windows and opens the power moonroof to quickly vent built-up interior heat. In addition, by inserting the built-in key into the driver's door lock and holding the key in the "lock" position, all open windows can be simultaneously raised.
The Acura TLX comes with two keyless remotes that can be set with a unique preference to accommodate the preferences of two different drivers. The available preferences include driver seat and mirror positions, along with select HVAC functions. Other preferences include turning entry lights on or off, audio system pre-sets, air conditioning preferences, and navigation system settings. In the event both owners use the car at the same time, the TLX will recognize the keyless remote that approaches the driver's door first.

Safety and Driver-Assistive Technologies
E-Pretensioner Front Seatbelts
Another new TLX safety feature on models with the Advance Package is a driver and front-passenger seatbelt e-pretensioner system. During normal driving conditions, the e-pretensioner system provides a reduced tension seatbelt experience, enhancing driving comfort. During sporty or aggressive driving, based on speed, yaw rate and lateral G, the system uses motors to subtly tighten the seatbelt and firmly hold the driver and front-seat passenger in their seat.
In addition, the e-pretensioner system tightens and holds the seatbelts during sudden steering inputs like those that may occur during an emergency maneuver, skid or minor collision. The e-pretensioner system is fully automatic and requires no intervention from the driver or front passenger, aside from the initial fastening of the seatbelt.
The front passenger seatbelt e-pretensioner system included in the TLX's Advance Package is supplementary to the load-limiting seatbelt retractors with pyrotechnic pretensioners that are featured on all TLX models.
Adaptive Cruise Control (ACC) with Low-Speed Follow (LSF)
Included in the TLX's Advance Package, Adaptive Cruise Control (ACC) allows the driver to set a desired speed and distance interval behind the vehicle ahead, allowing the use of cruise control in light traffic conditions. This significantly reduces the driver stress of driving in traffic. The system uses the Millimeter Wave Radar and a Monocular Camera to continually track the distance to the vehicle ahead, and then adjusts the TLX's speed to maintain a safe distance interval. A short, medium, long, or extra long interval can be selected. When required, the TLX autonomously brakes using the Vehicle Stability Assist (VSA) modulator.
Integrated Low-Speed Follow (LSF), which uses the same Millimeter Wave Radar, Monocular Camera, and VSA modulator, extends the automatic following capability to stop-and-go traffic situations (down to 0 mph). ACC with LSF functions include the following:
A preceding vehicle is detected in the lane ahead — Decelerates automatically, if required, and then controls the following distance.
The preceding vehicle stops — Stops automatically and remains stationary.
The preceding vehicle accelerates from a stop — Resumes following when the SET or RES switch or accelerator pedal is operated.
Another vehicle merges in between the TLX and the preceding vehicle — Automatically switches "targets" to the nearest preceding vehicle.
The preceding vehicle exits the lane — ACC with LSF system continues at cruise-control speed previously selected by driver (25 to 90 mph).
Collision Mitigation Braking System™ (CMBS)
Included in the TLX with Advance Package, Acura's newest version of its Collision Mitigation Braking System™ (CMBS™) is one of the most sophisticated driver-assistive technologies available. It continually scans traffic conditions ahead of the TLX, alerts the driver of a potential collision, and then takes emergency autonomous braking action to help reduce the severity of a collision if drivers don't take corrective action on their own.
When CMBS detects a potential collision, visual, audible and tactile (driver seatbelt e-pretensioning) alerts prompt the driver to take corrective actions. The visual alerts appear on the Multi-Information Display (MID), with another visual warning on the windshield via the head-up warning display. If the system determines that a collision is imminent, it applies the brakes to help reduce vehicle speed and eventual collision forces.
Further distinguishing the new TLX, its CMBS also recognizes shapes, and can differentiate between a vehicle and a pedestrian, warning the driver in each case. A Millimeter Wave Radar unit located behind the front grille and a Monocular Camera mounted at the upper portion of the windshield is used to detect vehicles and pedestrians. The radar unit and camera work simultaneously and cooperatively to control the VSA modulator, which provides any required braking. This "fusion" of radar and camera allows the system to more quickly determine a potential collision, significantly increasing the likelihood of bringing the car to a complete stop and avoiding impact.
It is important to note that CMBS cannot detect all objects ahead, nor is it intended to replace the driver's assessment of traffic conditions and control of the vehicle. The driver must intervene in certain situations, and must always be attentive when using the system. Although in many cases CMBS will stop the car, it is not intended to apply enough braking force to prevent all collisions. Based on the conditions, the system also may not perform all visual-, audible- and tactile-alert stages, and may instead automatically engage the brakes if the system deems it necessary.
Forward Collision Warning (FCW)
Included in models with the Technology Package or Advance Package, Forward Collision Warning (FCW) uses a camera mounted in the upper portion of the windshield to detect vehicles and pedestrians ahead and to determine whether a collision is imminent. If the FCW system detects a vehicle or pedestrian in front of the TLX and then determines that a collision may occur (due to a speed differential between the TLX and the object), it will trigger a "BRAKE" message on the Multi-Information Display (MID) and an audible alert. The FCW system in the TLX with Technology Package will not automatically brake, and the driver remains responsible for safely operating the vehicle and avoiding collisions.
Drivers may adjust the distance at which FCW alerts occur and may choose between "Long, " "Normal, " or "Short." Drivers may also select "Off" to disable the FCW system entirely.
Lane Departure Warning (LDW)
Included in the Technology Package and Advance Package, Lane Departure Warning (LDW) is designed to alert the driver if the vehicle is leaving a detected lane without the turn signal being activated. The system functions at speeds from 45 to 90 mph on straight or slightly curved roads, alerting the driver of deviations from a detected road.
In TLX models equipped with the Technology Package or Advanced Package, the same upper front windshield camera is used for LDW, FCW, and LKAS.
If the vehicle begins to move out of a detected lane without the turn signal activated, LDW illuminates a Lane Departure message on the Multi-Information Display (MID) and sounds an audible warning, advising the driver to take appropriate action. With the Advance package, the driver may select rapid steering wheel vibration (haptic feedback) instead of the audible warning. In either case, the system can be activated and deactivated by pressing the LDW button located on the instrument panel, to the left of the steering column.
There are certain conditions under which the system may not engage or operate, including inclement weather (e.g., snow, ice or heavy rain) and extreme cabin heat conditions (due to operability of the camera). It will automatically suspend operation when the brakes are applied or the turn signals are used. LDW may not detect all lane markings or lane departures; accuracy will vary based on weather, speed and road condition. The driver remains responsible for safely operating the vehicle.
Lane Keeping Assist System (LKAS)
Included in Technology Package and Advance Package, the Lane Keeping Assist System (LKAS) provides a less stressful driving experience by reducing steering correction movements and driving effort on the highway. LKAS uses a camera to read lane markings and uses EPS to assist the driver in keeping in the middle of the lane.
Designed for the U.S. road structure, the system uses a Monocular Camera mounted on the upper portion of the windshield to identify painted lanes, Botts' Dots and Cat Eye markers at speeds between 45 mph and 90 mph. When LKAS senses that the driver is drifting from the middle of a detected lane, the system generates corrective steering torque to assist the driver in maintaining lane position.
Road Departure Mitigation (RDM)
Included in the Advance Package, Road Departure Mitigation (RDM) is a new technology for Acura. RDM uses a Monocular Camera (mounted on the upper portion of the windshield) to identify solid or dashed painted lane lines, Botts' Dots and Cat Eye markers. RDM uses both steering force, via EPS, and braking force, via VSA, to help the TLX stay in its lane.
The monocular camera recognizes lane features and identifies the lane. If the RDM system detects that the TLX is about to leave the detected lane, it will provide steering assist (primary) and in rare occasions when steering is not sufficient, braking assist, to help the driver stay on the road. Only lane departure is activated if the driver is passing over a dashed line, bott's dots or cat eye, while deceleration support is disabled. In this case, TLX uses active steering force to return to the lane. RDM is integrated with the Vehicle Stability Assist (VSA) system to provide moderate braking, and with the Electric Power Steering (EPS) system to provide steering input.
Multiple visual and audible warnings alert the driver when the RDM system is taking corrective action. These include a lane departure warning on the driver's Multi Information Display (MID) along with an audible warning.
RDM also has a customizable initial warning of either a steering wheel shake/vibration, or an audible alert. This can be customized in the vehicle settings.
Blind Spot Information (BSI)
Included in the Technology Package and Advance Package, the Blind Spot Information (BSI) system uses two radar sensors to continually monitor conditions behind the TLX and alert the driver if another vehicle is detected in close proximity — especially in the blind spot of the driver. The BSI system uses the LED indicators (mounted on the A-pillar) and an audible warning to alert the driver.
There are two warning levels: 1) If a vehicle is detected in the driver's blind spot then the LED indicator on the incoming side illuminates; and 2) If a vehicle is detected and the TLX turn signal is activated, the LED indicator on the incoming side blinks and a buzzer sounds three times.
To prevent false alarms while maneuvering at low speed, the BSI system is disabled below approximately 20 mph.
Rear Cross Traffic Monitor
Included in the Technology Package and Advance Package, the new Rear Cross Traffic Monitor is a first for the Acura Division. Rear Cross Traffic Monitor works in conjunction with the TLX's BSI radar sensors to enhance driver confidence and safety when backing up. The system is especially useful when reversing in congested parking lots with an obstructed view from driver's seat.
The system utilizes a pair of blind-spot radar units located in the rear bumper corners. When Reverse is selected and an approaching vehicle is detected, arrows indicating the approaching vehicles direction are shown on the 8-inch center display's rear camera image. Simultaneously, an audible warning is emitted if cross-traffic is approaching from either side.
 
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Часть 2

Chassis
Front Cast-Aluminum and Steel Subframe
In a first for Acura, the TLX employs a cast-aluminum and steel "hybrid" front subframe to reduce road surface vibration and shock inputs for a smoother, quieter ride. The new subframe supports the engine, transmission, front suspension and steering system. The front section of the subframe is steel, and the rear section is cast aluminum. The sections are joined with a newly developed friction-stir-welding process to form a single high-strength, lightweight unit that provides ideal ride and handling properties. Altogether, the front subframe, along with a lower arm hydro-bushing, reduces vertical and fore/aft forces felt at front seats by 61 percent and 46 percent, respectively, compared to the previous TL model.
MacPherson Strut Front Suspension
MacPherson strut front suspension with Amplitude Reactive Dampers provides precise and engaging handling performance, a responsive feel for the driver, and luxurious ride quality. Specially tuned hydro-compliance bushings improve resistance to shimmy and while also reducing brake judder, further improving the TLX's refinement and driving character. All TLX models have a 26.0 mm diameter tubular (hollow) front stabilizer bar.
Rear Steel Subframe
Constructed of high-tensile steel, the rear subframe uses hydraulic mounts, along with increased fitting-point stiffness, to reduce road surface vibration and shock inputs for a smooth ride and low noise. The rear subframe reduces vertical and fore/aft forces felt at front seats by 31 percent and 33 percent, respectively compared to the previous TL model. In addition, on TLX models with Super-Handling All Wheel Drive (SH-AWD), the rear subframe features a 4-point differential mounting system. Its bushing rates are specially calibrated to reduce the transmission of driveline noise and vibration into the vehicle body, while also helping to maintain ride quality.
Multi-Link Rear Suspension
Multi-link rear suspension with Amplitude Reactive Dampers provides optimal handling agility, driver confidence and ride sophistication. Geometry, including rear toe control, is optimized for handling competence, stability and a sophisticated ride in a variety of urban, highway and open road scenarios. The system includes multi-link control arms, control-arm bushings that are optimized for the best blend of noise, vibration and harshness (NVH) isolation and handling precision, and Amplitude Reactive Dampers. Both the 4-cylinder and SH-AWD models have a 24.7 mm diameter rear stabilizer bar, while the front-wheel drive V-6 has a 25.4 mm diameter stabilizer bar.
Amplitude Reactive Dampers (ARD)
Acura's Amplitude Reactive Dampers provide both superior ride comfort and sporty handling, helping the new TLX provide a truly engaging driving experience in all driving situations. Two separate damping mechanisms are utilized, with one tuned for maximum efficiency on smoother roads with small inputs and the other tuned to handle large inputs such as rough roads, potholes, and sudden steering and braking action. Front triple-path damper mounts further improve ride comfort without sacrificing handling. The result is a vehicle that remains composed and comfortable in a wide range of conditions.
The core technology contained within the Amplitude Reactive Dampers is their two separate damping pistons, including a main piston and a second piston. To improve overall ride comfort, when smaller inputs occur during normal driving conditions, only the main piston works to provide the ideal damping characteristics. To improve the TLX's ride and handling during more severe conditions, the second piston operates to provide additional damping force.
Amplitude Reactive Dampers operate on a purely mechanical basis that does not require electronic controls.
Vehicle Stability Assist™ (VSA®)
The TLX's Vehicle Stability Assist™ (VSA®) works in conjunction with the Drive-by-Wire throttle system and ABS to enhance vehicle stability when cornering: If vehicle understeer or oversteer is detected, the system selectively reduces power and/or applies braking force to individual wheels to help correct the condition and stabilize the vehicle.
VSA also supports the functioning of available driver-assistive technologies such as Adaptive Cruise Control (ACC) with Low-Speed Follow (LSF), Collision Mitigation Braking System™ (CMBS) and Road Departure Mitigation (RDM). The advantages of the latest VSA system on the new TLX include quicker response with smoother activation and more accurate control, improved brake-pedal feel and lower operating noise, vibration and harshness (NVH).
In addition, traction control monitors front-wheel slippage, such as when starting on slick surfaces or patches of ice. If slippage is detected, traction control activates one or more brake calipers and reduces engine torque to slow the spinning wheel(s) so traction can be regained.
Integrated Dynamic System (IDS)
ECON, Normal, Sport and Sport+ modes allow the driver to customize their driving experience. The modes are driver-selectable via a console-mounted button and are displayed on the Multi-Information Display located between the tachometer and speedometer. ECON, Normal and Sport are selectable as default, or last used modes, while Sport + defaults to Sport at ignition off, and must be reselected after a restart. ECON mode favors high fuel efficiency, while Normal mode is for everyday driving. Sport mode enhances throttle, EPS and P-AWS response or SH-AWD rear-wheel torque-vectoring control to sharpen vehicle dynamics, while Sport+ mode enhances transmission shift mapping, maximizing performance.
Motion-Adaptive Electric Power Steering (MA-EPS)
The TLX's next-generation Motion-Adaptive Electric Power Steering offers precise direct feel, high energy-efficiency, tunable response and improved active safety. MA-EPS responds instantly to steering input and automatically changes the amount of power assist appropriate to the vehicle's speed. Its idealized steering effort and linearity, excellent on-center feel, minimal torque steer and maximum parking ease provides a satisfying driving experience under all conditions.
Motion-Adaptive Function
The Motion-Adaptive EPS system consists of a rack-and-pinion steering gear with an electric motor installed concentrically around the steering rack. To control the level of assist the Powertrain Control Module receives signals from a speed sensor and, coupled with a steering sensor for torque and rotation, then calculates the optimal amount of assist and sends a signal to the electric motor.
When compared to the operation of a conventional hydraulic pump power steering system, the simpler MA-EPS increases efficiency because it does not draw a continuous amount of power directly from the engine. Other advantages of electric power-assisted steering include simplicity, lower power consumption (which helps improve fuel efficiency), and compactness.
Vehicle Stability Assist (VSA®) Integration
MA-EPS and Vehicle Stability Assist (VSA®) work together as one sophisticated system to significantly enhance active safety. The stability technology initiates steering inputs that prompt the driver to steer in the correct direction when the limits of traction are approached.
Using vehicle speed and steering angle data, MA-EPS works with VSA® to detect instability in low traction conditions (both during cornering and under braking) and automatically initiates steering inputs aimed at prompting the driver to steer in the correct direction. This advanced technology supports the driver's action in operating the vehicle more safely and comfortably.
Below are three examples of how MA-EPS works as part of VSA®.
Mitigates Understeer – Helps correct the steering inputs to mitigate understeer and help the driver trace the intended curve of the road.
Mitigates Oversteer – Helps correct the steering inputs to mitigate oversteer and help the driver trace the intended curve of the road.
Stabilizes Braking – Helps correct the driver's steering input to reduce vehicle instability when the driver is braking hard on road surfaces with varying friction coefficients (such as pavement that is only partially covered with dirt or snow).
Integrated Dynamics System (IDS) Integration
MA-EPS also integrates with the TLX's standard Integrated Dynamics System (IDS). At the driver's discretion, the steering response can be switched between two distinct steering settings (Normal: when in Normal or ECON, and Sport: when in Sport or Sport+). (See below for more information.)
Precision All-Wheel Steer™ (P-AWS)
The latest version of Acura's Precision All-Wheel Steer™ (P-AWS) helps the TLX driver smoothly and easily trace the desired line with smaller steering-wheel inputs. The result is best-in-class dynamic performance at all speeds, providing the TLX driver with the most engaging driving experience possible. Precision All-Wheel Steer (P-AWS) is standard on all two-wheel-drive TLX models.
P-AWS provides independent electronic control of rear-wheel toe angles. Benefits of the system include:
Minimized turning radius with neater execution of sharp low-speed turns
Improved response for quick steering maneuvers such as lane changes
Enhanced agility and nimbleness in tight, urban conditions
More confidence and control on curved highway on- and off-ramps
Greater agility on winding roads
Quicker and more effective emergency steering response
Increased straight-line highway stability
Confident braking stability
Improved high speed response and stability in winter driving and when Vehicle Stability Assist (VSA) is activated
P-AWS Operation
Key components of P-AWS include independent electrically assisted left/right toe-control actuators, special control arms and suspension uprights, and an electronic control unit that is linked via a dedicated Control Area Network (CAN) to the Electric Power Steering (EPS), Vehicle Stability Assist (VSA), braking and engine control systems.
In operation, P-AWS continuously monitors and calculates the correct amount of rear-toe angle input necessary for the conditions, analyzing steering input, engine and road speed, transmission, throttle position, brake pressure, yaw rate, lateral acceleration and other factors. The maximum amount of rear-wheel toe angle adjustment is 1.8 degrees in either direction (positive or negative) for a total range of 3.6 degrees.
P-AWS system operation automatically and continually matches driving situations such as turning at an intersection, driving on windy roads, when merging or exiting a highway, higher speed maneuvers or in snowy conditions. The P-AWS system provides confidence-building cornering capability through improved responsiveness and vehicle control. Examples include:
Secure Highway Cruising – When the driver initiates a lane-change maneuver requiring that the TLX neatly move into the next lane, the P-AWS system adjusts the rear wheel toe angles in phase (the same direction) with the front wheels enabling quick, clean and stable maneuvering.
City Agility and Easy Parking – For sharp low-speed turns, such as on city streets or in parking lots, the P-AWS system adjusts the rear wheel toe angles out of phase (the opposite direction) with the front wheels. This results in a tighter turning radius and reduces driver effort.
Fun to Drive on Winding Roads – When tracing the lines of a twisty road — and helping the TLX track confidently in snowy conditions — the P-AWS system counteracts understeer by helping introduce yaw — the necessary rotational effect — through the corner.
Agile Handling Assist (AHA)
Agile Handling Assist (AHA) extends the P-AWS function by using the brakes in cornering to create yaw, or turning motion, helping the driver smoothly and easily trace the desired line with smaller steering-wheel inputs. AHA stabilizes the car earlier than conventional vehicle stability assist systems, resulting in more agile and engaging dynamic performance in everyday driving conditions.
Super Handling All-Wheel Drive (SH-AWD)
The TLX SH-AWD features a new hydraulically-controlled iteration of Acura's acclaimed Super Handling All-Wheel Drive™ (SH-AWD®), which progressively distributes optimum torque not only between the front and rear axles, but also between the left and right rear wheels. Like its P-AWS counterpart, the TLX SH-AWD system is complemented by the brake torque effect of Agile Handling Assist.
The benefits of the SH-AWD system are superior all-weather handling and neutral, accurate steering under power. By rotating the outside rear wheel faster than the front axle while cornering, SH-AWD uses torque vectoring to create a yaw moment to help turn the vehicle through the corner — reducing understeer and improving controllability. With cornering forces more evenly distributed between front and rear tires, overall cornering power is increased — on wet or dry roads.
This next-generation SH-AWD system is 25 percent lighter and utilizes new hydraulic control to overdrive the rear wheels by 2.7 percent (compared to 1.7 percent for the previous system), enabling greater turning forces at reduced speeds and in tighter corners (see Powertrain for additional detail).
4-Wheel Disc Brakes with ABS and Brake Assist
The TLX is equipped with 4-wheel disc brakes with a 4-channel anti-lock braking system (ABS). The pedal feel is smooth and easy to modulate in light braking, and linear and pleasantly low-effort during medium and hard braking. The result is short, confident stops — with excellent pedal feel — under all conditions.
The front discs measure 12.6 inches in diameter, while the rear discs measure 12.2 inches in diameter. Weighing a total of 2.5 pounds less than the previous TL brakes, the lighter-weight TLX brakes help improve ride quality, handling capability and fuel efficiency. The brake pads are a high-friction type to optimize response and peak stopping performance even under strenuous conditions. The brake calipers are designed to reduce brake drag when not in use, reducing rolling resistance and improving fuel efficiency in the process.
The front brakes feature supplemental external vents that provide a second airflow path around the brake rotors, reducing thermal deformation by 51-percent. The byproduct of this better cooling is a 30 percent reduction in brake judder — felt by the driver as steering-wheel and brake-pedal vibration — during aggressive driving.
ABS independently modulates braking power at each wheel to help the driver retain steering control during heavy braking, while Brake Assist recognizes emergency braking situations and almost instantly applies full braking force when appropriate.
6-Piston Brake Modulator
The TLX employs a premium Bosch 6-piston brake modulator that provides the ultra-quick braking response required for Vehicle Stability Assist (VSA), Active Handling Assist (AHA), Low Speed Follow (LSF) operation, Road Departure Mitigation (RDM), and Collision Mitigation Braking System (CMBS). The brake modulator's function is to build braking pressure almost instantaneously, and utilizing six pistons — instead of the two pistons in the previous TL brake modulator — it delivers significantly quicker response than before.
The new brake modulator also includes two additional pressure sensors, which ensure the smoothest possible pump operation. This reduces the potential vibration that might otherwise be felt through the TLX's unit-body and brake pedal, improving overall braking-system refinement to an unprecedented level. In addition, a special Active Noise Shaping (ANS) chip incorporated into the motor controller circuitry measurably reduces noise during brake modulator operation. The operating algorithms of the system are proprietary and developed by Acura engineers.
Electric Parking Brake and Automatic Brake Hold
The combination of Electric Parking Brake (EPB) and Automatic Brake Hold meaningfully reduce the effort of driving the vehicle, thereby raising overall enjoyment and comfort for the driver.
Electric Parking Brake
The Electric Parking Brake (EPB) on the TLX makes using the parking brake easier and more comfortable. The parking brake now requires only a pull on a button on the center console. To release the parking brake, the driver simply presses on the accelerator pedal (while the seatbelt is buckled) or pushes on the parking brake switch. In addition to being simpler, more convenient and more comfortable to use than a traditional parking brake, the new Electric Parking Brake makes hill starts easier when the TLX is parked on a grade.
The one touch operation also promotes the use of the parking brake. As with a traditional manually activated parking brake, EPB functions on the rear wheels only. As an additional benefit, EPB weighs 9.7 pounds less than a traditional mechanical parking brake, helping to improve the TLX's performance and fuel economy.
Automatic Brake Hold
The EPB also features Automatic Brake Hold, which retains brake pressure when the vehicle is stopped, simplifying driving in heavy traffic or hills. This frees the driver from continually pressing the brake pedal to maintain the vehicle in a stopped position, a significant improvement in driving enjoyment in difficult conditions.
Operating the system requires two simple actions from the driver:
Activating/deactivating the system via a switch on the center console
Pressing on the brake pedal when the vehicle comes to a stop
Once these steps are taken, Automatic Brake Hold will indicate engagement and then maintain brake pressure when the vehicle has come to a stop, even if the driver releases the brake pedal. The TLX then remains stopped — even on a hill — until the driver presses the accelerator pedal. At this point Automatic Brake Hold releases the brakes and the vehicle resumes normal braking function.
Tire Pressure Monitoring System (TPMS)
A standard Tire Pressure Monitoring System (TPMS) helps the driver maintain proper air pressure to improve driving safety and fuel efficiency, as well as reduce wear and tear on the vehicle's tires. Located in the Multi Information Display (MID), the TPMS graphic indicates the pressure in all four tires on a real-time basis. A TPMS icon illuminates to alert the driver whenever any of the tires has a significantly low-pressure reading that requires the driver's attention.
Capless Fueling System
The TLX's capless fueling eliminates the fuel cap, meaning that fueling the vehicle simply requires opening the fuel lid, refueling, and then closing the lid. This smart and easy-to-use design eliminates the need to touch a dirty fuel cap, reduces the possibility of damaging the vehicle's paint with the fuel cap or tether, or forgetting the fuel cap at the gas station. It also eliminates the possibility of activating an emissions warning by failing to properly re-install the fuel cap. And finally, the capless fueling system allows the use of a smaller fuel-cap door, which cleans up the lines of the vehicle.
The system consists of two integrated components, including an outer shutter mechanism that prevents the intrusion of dirt and dust, and a self-sealing fueling flap that is closed by a torsion spring. Both operate automatically.
At a gas station, the driver simply opens the fuel lid and then inserts the fuel nozzle. Inserting the nozzle automatically opens the outer shutter and fueling flap. When fueling is complete, removing the fuel nozzle automatically closes both the fueling flap and outer shutter.

Body
With its low and wide stance, the new 2015 TLX possesses a lithe exterior form, taut body surfaces and "just right" proportions for a sports sedan. This sporting character is further defined by shortened front and rear overhangs, dynamically sculpted fender arches, and purposeful character lines. Even the sculpted hood, with its sharply creased bilateral ridgelines, hints at the performance capabilities of the advanced new Acura powertrains it conceals. Meanwhile, the open and airy greenhouse provides commanding sight lines, with slim A-pillars providing improved visibility.
"Just Right" Dimensions
The 2015 TLX's "just right" body dimensions result from a careful balance of aerodynamic efficiency, interior roominess, dynamic performance, quietness and refinement, and design. Compared to the previous TL, the new TLX has the same 109.3-inch wheelbase, but is 3.8 inches shorter in overall length. This positions it between the smaller ILX entry-luxury sedan and flagship RLX sedan. Despite its more compact exterior footprint, the TLX offers a spacious interior that approaches the previous TL.
In comparison to its competitors, the TLX is longer than the Audi A4, BMW 3 Series, Lexus IS and Mercedes-Benz C-Class. It is also significantly wider than all of its direct competitors, including the Lexus ES and GS, and Mercedes-Benz E-Class.
High Strength Steel
To achieve the high rigidity that promotes a smooth and quiet ride, crisp steering and handling, safety performance and long-term durability, the TLX utilizes six different grades of high-strength steel (HSS) in 52% of its body structure by weight. This high-grade, high-tensile strength steel adds the required rigidity for these positive traits without adding excessive weight, which in turn enhances fuel efficiency and lowers emissions. Altogether, 59-percent of the TLX body is created from a combination of high-strength steel, aluminum and magnesium.
Aluminum Components
Aluminum stampings are used in certain key locations to reduce the TLX's curb weight, which provides benefits in handling, fuel efficiency and emissions reductions. Altogether, the aluminum components comprise 6-percent of the TLX's body weight, a savings of 27.8 pounds compared to comparable steel components.
Among the aluminum body components are:
Hood
Front bumper beam
Rear bumper beam
Front subframe (hybrid aluminum/steel)
Magnesium Steering Hanger Beam
Located behind the instrument panel, a 3-piece magnesium steering-hanger beam replaces the 26-piece aluminum and steel unit in the previous TL model. Its purpose is as a structural attachment point for the steering column, pedals and instrument panel, as well as a structural element that helps the passenger cabin retain its shape in certain collisions. This single robust magnesium component makes up 2-percent of the TLX's body weight.
LED Lighting
The most comprehensive use of LED lighting on any Acura vehicle is a signature design element of the new TLX. From the dramatic Jewel Eye™ headlights to the convenient new puddle lights and back to the new taillights, the LED lighting provides crisp, bright, energy-efficient and long-lasting illumination that directly improves the driving and ownership experience. A summary of exterior lighting includes:
Forward Lighting
New LED headlights with incandescent-bulb turn signals
New LED parking and side marker lights
New LED under-mirror puddle lights (Advance grades)
LED front fog lights (Advance grades)
Rear Lighting
New LED tail and trunk-lid lights with incandescent-bulb turn signals and backup lights
New LED Center High Mount Stop Lights (CHMSL) with integrated cover
LED license-plate lights
Jewel Eye™ LED Headlights
Acura's signature Jewel Eye™ LED headlights give the TLX with an advanced and appearance while producing superior down-the-road illumination. The headlights utilize an array of high-intensity LED lamps to deliver outstanding light distribution, distant irradiation performance and light characteristics with a wavelength close to the human eye's luminosity curve. With five "Jewel Eye" lights per headlight, the LED lights provide improved down the road visibility compared to HID and halogen headlights.
On each side of the TLX, the low beams consist of three LED lights, while the innermost LED lights are utilized for high beams. The daytime running light (DRL) function utilizes all five lenses illuminated by LED's that are clearly and dramatically visible even in bright sunlight. Altogether, they create a dramatic and distinctive appearance with superior lighting capability.
Besides producing better light characteristics with lower energy usage, the TLX's LED headlights are longer lasting. With an estimated life expectancy of 10,000 hours, the LED headlights are projected to last five times longer than HID headlights and 10 times longer than traditional halogen headlight bulbs — contributing to less frequent replacement and potential associated cost savings. Further, their compact packaging allow for an improved aerodynamic frontal design.
 
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LED Fog Lights
Included in the Advance Package, LED fog lights are positioned at the lower corners of the TLX's front fascia for maximum effectiveness and a bold appearance.
LED Taillights
LED taillights are part of the TLX's comprehensive exterior lighting array. Highly stylized to compliment the TLX body design, they are also brighter than traditional incandescent-bulb taillights, with a longer projected lifespan. Use of LEDs allows the addition of a "light pipe" styling element extending across the top of the lenses, contributing to the TLX's unique blend of design and engineering.
LED Puddle Lights
Included in the standard Smart Entry system, LED puddle lights positioned on the undersides of both side mirror housings enhance convenience when entering or leaving the vehicle. The LEDs automatically illuminate when the TLX detects the key fob approaching, in concert with the automatic interior illumination. The puddle lights also illuminate when the driver puts the TLX in Park and leaves the vehicle, fading off after about two seconds after locking the doors, or 30 seconds if the doors are not locked.
LED Side Mirror Lights
Keying off of the Jewel Eye™ LED headlights, each TLX mirror has LED lights fused into the mirror housing. The LEDs come to life when the turn indictors are activated, providing extra visibility and a high tech appearance.
Auto-Dimming Side Mirrors
Included in the Advance Package, auto-dimming side mirrors use the same activation sensor as the TLX's auto-dimming inside rearview mirror. The auto-dimming function of all three mirrors helps reduce glare during nighttime driving, especially from the headlights of following vehicles. Mirror glass area is 24-percent greater than on the previous TL model for improved rear visibility.
Expanded View Driver's Mirror
An Expanded View Driver's Mirror performs like two mirrors in one. The larger, inset portion of the mirror is relatively flat and works like a conventional sideview mirror to show objects to the side of the vehicle. The outer portion of the mirror is optically convex and functions as a wide-angle mirror to expand the driver's view to the side by approximately 39 percent, helping to reduce the blind-zone area.
Acoustic Glass
To reduce noise in the cabin The TLX utilizes a 4.5-mm thick, 3-layer acoustic windshield that consists of two layers of safety glass, separated by a thin acoustic resin center. The windshield reduces wind noise on in the higher frequency ranges, contributing to a luxurious feeling of isolation in the cabin. Also helping to mitigate wind, road and traffic noise in the cabin is 5.0-mm thick front door glass.

Powertrain
The TLX's two new Direct Injection (DI) engines combine power and efficiency. The 2.4-liter DOHC i-VTEC 4-cylinder engine produces a peak 208 horsepower and 247Нм of torque. It has more horsepower and substantially more torque—particularly in the mid-range—than the same-sized engine that powers the TSX sedan. Even though the TLX is larger and heavier than the outgoing TSX 4-cylinder, it actually posts superior EPA fuel-economy ratings .
A new 3.5-liter direct injected i-VTEC® 24-valve V-6 engine replaces the 3.5-liter and 3.7-liter engines in the TL. The new powerplant gains 10 horsepower (290 peak horsepower) and 355 or torque. To boost fuel efficiency, Variable Cylinder Management (VCM) automatically deactivates three of the engine's six cylinders under light engine loads. TLX SH-AWD models also add a new automatic idle-stop feature to further improve fuel efficiency.
Powertrains at Glance
2.4-liter DOHC i-VTEC
2.4-liter, DOHC, inline-four engine produces peak output of 208 horsepower at 6,800 rpm and peak torque of 247Hm at 4,500 rpm
i-VTEC® (intelligent Variable Valve Timing Control and Lift Electronic Control) for intake valves
Computer-controlled Direct Injection (DI) with multi-hole fuel injectors
11.6:1 compression ratio
High-strength steel crankshaft
Drive-by-Wire™ throttle system
Direct ignition system
Chain drive, DOHC, i-VTEC® 16-valve
Detonation/knock control system
Integrated Dynamics System (IDS) provides three unique drive-by-wire throttle profiles
Maintenance Minder™ system optimizes service intervals
100,000 +/- miles tune-up interval3
High-flow, close-coupled next-generation precious metal catalytic converter plus under floor catalytic converter
ULEV-2 Emissions compliant
24/35/281 (city/highway/combined) mpg EPA fuel-economy ratings (FWD)
Sequential SportShift 8-Speed Dual-Clutch Transmission (DCT) with Torque Converter and Paddle Shifters
World's first DCT to be equipped with a torque converter
Straight-gate style console-mounted shifter
Sequential SportShift allows semi-manual operation
Steering wheel-mounted, racing-inspired paddle shifters
Cooperative control between Drive-by-Wire throttle system and transmission makes for quicker, smoother shifts
Advanced shift-hold control limits up shifts during spirited driving
Grade Logic Control System reduces gear "hunting" on steep hills
3.5-liter SOHC i-VTEC V-6 with VCM
3.5-liter, SOHC, V-6 engine produces peak output of 290 horsepower at 6,200 rpm and peak torque of 355Hm at 4,500 rpm
i-VTEC® (intelligent Variable Valve Timing and Lift Electronic Control) for intake valves with Variable Cylinder Management™ (VCM®)
Computer-controlled Direct Injection (DI) with multi-hole fuel injectors
11.5:1 compression ratio
High-strength steel crankshaft
Crossflow magnesium intake manifold
Belt drive, SOHC, i-VTEC® 24-valve with VCM®
Drive-by-Wire™ throttle system
Direct ignition system
Detonation/knock control system
Integrated Dynamics System (IDS) provides three unique drive-by-wire profiles
Maintenance Minder™ system optimizes service intervals
100,000 +/- miles tune-up interval3
High-flow, close-coupled next-generation precious metal catalytic converters plus under floor catalytic converter
ULEV-2 Emissions compliant
Sequential SportShift 9-Speed Automatic with Paddle Shifters
Electronic shift-by-wire gear selector
Sequential SportShift automatic transmission allows semi-manual operation
Steering wheel mounted racing-inspired paddle shifters
Cooperative control between Drive-by-Wire throttle system and transmission makes for quicker, smoother shifts
Advanced shift-hold control limits up shifts during spirited driving
Grade Logic Control System reduces gear "hunting" on various road gradients
Continuously adaptive Sport+ setting which selects shift strategies suited for aggressive driving conditions
Direct-Injected 2.4-liter Inline 4-cylinder Engine
The TLX's new Direct Injection (DI) 2.4-liter DOHC i-VTEC 4-cylinder engine brings a host of intelligent technology to its segment. The engine's i-VTEC system combines VTC (Variable Timing Control), which continuously adjusts the intake camshaft phase, with Variable Valve Timing and Lift Electronic Control (VTEC), which changes valve lift, timing and duration of the intake valves. A new Direct Injection (DI) system, dual-stage intake manifold and other technologies combine to produce up to 10-percent more torque as compared to the same sized engine that is standard in the TSX Sedan, with greater power available over the entire operating range. Peak power (206 horsepower) is also higher than that of the TSX engine, with the peak arriving at 6,800 rpm instead of 7,000 rpm.
4-Cylinder Engine Block, Crankshaft and Pistons
The TLX's 2.4-liter engine has a lightweight die-cast aluminum block with a single main-bearing cradle design that creates a rigid assembly to help minimize noise and vibration. Cast-in iron cylinder liners provide long-lasting durability. Each journal on the forged-steel crankshaft is micropolished to reduce internal friction. To improve smoothness throughout the rpm range and help lower noise levels, the engine is fitted with an internal balancer unit. Consisting of a pair of chain-driven counter-rotating shafts located in the lower block and integrated into the oil pan, the balancing system helps quell the inherent second-order harmonic vibrations that normally impact inline 4-cylinder engines.
To reduce piston-sliding friction, the cylinder bores are offset by 8.0 mm from the crankshaft. This gives the connecting rods a more favorable angle during each power stroke, which reduces side loading on the pistons and in turn, improves efficiency. The engine features a forged crankshaft for high rigidity and low friction. Lightweight pistons have a carefully optimized skirt design to minimize reciprocating weight, and reduced weight minimizes vibration and increases operating efficiency. The piston crowns are dished, to help maintain stable combustion and to optimize distribution of the stratified fuel charge from the direct injector in each cylinder. This close control over the combustion process boosts overall operating efficiency.
4-Cylinder Dual-Stage Intake Manifold
To maximize power output, the 2.4-liter engine has a dual-stage intake manifold has two different intake runner lengths that are selected based on the operating conditions. An actuator and a set of four butterfly valves control the intake runner switching process. At low engine speeds, the long runners are used to improve low-end torque. At higher engine speeds the system switches to the short intake runners for greater high rpm power. The result is intake tuning that is optimized for the engine's entire operating range.
2.4-liter Engine Cylinder Head and Valvetrain
The lightweight cylinder head is made of pressure-cast aluminum alloy, with exhaust passages cast directly into the cylinder head. This eliminates the need for a traditional separate exhaust manifold and allows the close-coupled catalytic converter to be mounted directly to the cylinder head.
A silent-chain drives the dual overhead cams and features a double-arm tensioner design that reduces operating friction. The cam drive is designed to be maintenance free throughout the life of the engine.
To help boost fuel efficiency and power, the combustion chamber shape and valve angles have been optimized. The included valve angle is a narrow 35 degrees, which decreases the surface-to-volume ratio and helps create a flatter, more compact combustion chamber that reduces unburned hydrocarbon emissions. With this combustion chamber shape and the precise control of direct injection, the compression ratio set at 11.6:1.
The cylinder head features a new "tumble port" intake design. In combination with the new combustion chamber and piston crown shape, the design's high level of airflow tumble helps create a homogenous fuel mixture for low fuel consumption and high airflow for high power output.
2.4-Liter Engine i-VTEC Valve Control System
The TLX's direct-injected 2.4-liter DOHC 16-valve i-VTEC engine uses an advanced valve-control system to combine high power output with high fuel efficiency and low emissions. The system combines VTC (Variable Timing Control), which continuously adjusts the intake camshaft phase, with Variable Valve Timing and Lift Electronic Control (VTEC), which changes valve lift, timing and duration of the intake valves.
At low rpm, the VTEC intake valve timing and lift are optimized for high torque and low fuel consumption. As engine rpm builds past 4,900 rpm, the VTEC system transitions to a high-lift, long-duration intake cam profile for superior high-rpm engine power.
The "intelligent" portion of the system is its ability to continuously vary the timing of the intake cam relative to that of the exhaust camshaft. This helps boost power and also provides a smoother idle (allowing idle speed to be reduced). The intake cam timing is varied based on input from sensors that monitor rpm, timing, throttle opening, cam position and exhaust air-fuel ratio. The result is increased fuel efficiency and lower NOx emissions.
3.5-liter V-6 Engine
The TLX 3.5-liter i-VTEC® V-6 is closely related to the 3.5-liter V-6 that powers the RLX and MDX. It has a die-cast lightweight aluminum alloy block with cast-in-place iron cylinder liners, a smooth-firing 60-degree V-angle, and compact overall dimensions. As in the 2014 Acura RLX and MDX, the TLX powerplant combines Direct Injection with i-VTEC and Variable Cylinder Management (VCM) to give the TLX impressive fuel economy ratings and overall performance. This clean-running engine meets ULEV-2 emissions standards in select states, and Federal Tier 2, Bin 5 standards.
A wide range of improvements, including revised intake and exhaust ports and new valve timing, help make the 3.5-liter V-6 more powerful than the 3.5-liter V-6 engine it replaces. The aluminum-alloy 24-valve engine produces 290 horsepower at 6,200 rpm and generates 355Hm of torque at 4,500 rpm. Torque has also improved throughout the entire operating range, with the most substantial gains at low rpm, aiding the TLX's responsiveness.
V-6 Engine Block and Crankshaft
With its 60-degree V-angle, the TLX's available V-6 engine has compact overall dimensions that allow efficient packaging within the vehicle. The V-6 has a die-cast lightweight aluminum alloy block with cast-in-place iron cylinder liners. Made with a centrifugal spin-casting process, the thin-wall liners are high in strength and low in porosity. The block incorporates a deep-skirt design with four bolts per bearing cap for rigid crankshaft support and minimized noise and vibration. The 3.5-liter V-6 uses a high-strength steel crankshaft for minimum weight. A cooling control spacer positioned in the water jacket surrounding the cylinders helps control warm-up and operating cylinder liner temperatures to reduce friction.
V-6 Pistons/Connecting Rods
Designed with "cavity-shaped" crowns, the V-6 engine's pistons help maintain stable combustion and contribute to optimized combustion. Ion-plated piston rings help reduce friction for greater operating efficiency. The compression ratio (relative to the 2014 TL 3.5- and 3.7-liter engines) has risen from 11.2:1 to 11.5:1. Heavy-duty steel connecting rods are forged in one piece and then the connecting rods are "crack separated" to create a lighter and stronger rod with an optimally fitted bearing cap.
V-6 Cylinder Heads and Valvetrain
Like other Acura V-6 powerplants, the TLX engine's 4-valve cylinder heads are a single-overhead-camshaft design, with the cams driven by the crankshaft via an automatically tensioned toothed belt. Made of low-pressure cast, low-porosity aluminum, each cylinder head incorporates a laminar flow intake design that improves combustion efficiency by creating a more homogeneous fuel-air mixture. An integrated exhaust manifold cast into each cylinder head reduces parts count, saves weight, improves flow and optimizes the location of the close-coupled catalyst.
V-6 i-VTEC with 2-Stage Variable Cylinder Management™ (VCM®)
The TLX SOHC V-6 combines Variable Cylinder Management (VCM) with Variable Valve Timing and Lift Electronic Control (i-VTEC), which changes the lift profile and thus timing and lift duration of the intake valves. A switching mechanism allows the engine to operate with the lift and duration optimized for either low or high-rpm operation. The rear cylinder bank closes all intake and exhaust valves to minimize pumping losses on the cylinders which are still firing, increasing overall engine efficiency.
The "intelligent" portion of the system is its ability to vary valve operation based on the driving situation and engine rpm. At low rpm, the i-VTEC intake valve timing and lift are optimized (low lift, short duration) for increased torque, which allows a wide range of 3-cylinder operation. As engine rpm builds past 5,000 rpm, the i-VTEC system transitions to a high-lift, long-duration intake cam profile for superior high-rpm engine power.
V-6 VCM Operation — To help improve the fuel efficiency of the TLX engine, Acura's Variable Cylinder Management (VCM) is used. The system cooperates with Active Control engine Mounts (ACM) to allow the engine to operate with three cylinders in a wide range of situations to maximize fuel efficiency and reduce emissions. When greater power is needed, the system switches seamlessly to 6-cylinder operation.
During startup, aggressive acceleration, or steep ascents — any time high power output is required — the engine operates on all six cylinders. During moderate-speed cruising and at low or moderate engine loads, the system operates just the front bank of three cylinders.
The VCM system can tailor the working displacement of the engine to match the driving requirements from moment to moment. Since the system automatically closes both the intake and exhaust valves of the cylinders that are not used, pumping losses associated with intake and exhaust are eliminated and fuel efficiency gets a further boost. The system combines maximum performance and maximum fuel efficiency — two characteristics that don't typically coexist in conventional engines.
VCM deactivates specific cylinders by using the i-VTEC (intelligent Variable Valve-Timing and Lift Electronic Control) system to close the intake and exhaust valves while the Electronic Control Unit (ECU) simultaneously cuts fuel to those cylinders. The spark plugs continue to fire in inactive cylinders to minimize plug temperature loss and prevent fouling induced from incomplete combustion during cylinder re-activation.
The system is electronically controlled, and uses special integrated spool valves in the cylinder heads. Based on commands from the system's Electronic Control Unit, the spool valves selectively direct oil pressure to the rocker arms for specific cylinders. This oil pressure in turn drives synchronizing pistons that connect and disconnect the rocker arms.
The VCM system monitors throttle position, vehicle speed, engine speed, automatic-transmission gear selection and other factors to determine the correct cylinder activation scheme for the operating conditions. In addition, the system determines whether engine oil pressure is suitable for VCM switching and whether catalytic-converter temperature will remain in the proper range. To further smooth the activation or deactivation of cylinders, the system adjusts ignition timing and throttle position and turns the torque converter lock-up on and off to seamlessly transition between three and six cylinder modes.
V-6 SH-AWD Idle Stop System
To help improve fuel efficiency, TLX SH-AWD models come equipped with a new Idle Stop capability. When the system is active and certain operating conditions are met, the TLX engine will automatically shut off when the vehicle comes to a stop. When the driver releases the brake pedal after a stop, the engine automatically restarts and the TLX is ready to accelerate.
 
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Часть 4

Common Engine Features
Cold-Air Induction System

To maximize power output, the TLX has a cold-air intake system that picks up engine induction air from the grille area at the front of the vehicle, which is typically about five percent cooler than the air in the hot engine compartment. Cooler intake air has greater density, which allows the Direct Injection system to add proportionately more fuel for enhanced power output.
Direct Injection System
Both 4-cylinder and V-6 TLX engines feature efficient direct injection. The system features a compact, high-pressure, direct-injection pump that allows both high fuel flow and pulsation suppression, while variable pressure control optimizes injector operation. A multi-hole injector delivers fuel directly into each cylinder (not to the intake port, as in conventional port fuel injection designs), allowing for more efficient combustion and greater power output.
The multi-hole injectors help create the ideal stoichiometric fuel/air mixture in the cylinders for good emissions control. Theoretically, a stoichiometric mixture has just enough air to completely burn the available fuel. Based on the operating conditions, the direct-injection system alters its function for best performance. Upon cold engine startup, fuel is injected into the cylinders on the compression stroke. This creates a weak stratified charge effect that improves engine start-up and reduces exhaust emissions before a normal operating temperature is reached. For maximum power and fuel efficiency, fuel is injected during the intake stroke once the engine is fully warmed up. This helps create a more homogeneous fuel/air mix in the cylinder. This improves volumetric efficiency, and the cooling effect of the incoming fuel improves anti-knock performance.

Drive-by-Wire™ Throttle System
The TLX Drive-by-Wire™ throttle system replaces a conventional throttle cable with smart electronics that "connect" the accelerator pedal to a throttle valve inside the throttle-body. The result is less under-hood clutter and lower weight, as well as quicker and more accurate throttle actuation. Plus, a specially programmed "gain" rate between the throttle pedal and engine offers improved drivability and optimized engine response to suit specific driving conditions.
Acura's Drive-by-Wire throttle system establishes the current driving conditions by monitoring throttle pedal position, throttle valve position, engine speed (rpm) and road speed. This information is used to define the throttle control sensitivity that gives the TLX's throttle pedal a predictable and responsive feel that meets driver expectations.
Three different throttle profiles are available in the TLX. When the Integrated Dynamics System (IDS) is in the ECON mode, the system uses a gradual profile that encourages fuel savings. In Normal mode, the throttle profile balances economy and performance for all-around driving. When the Sport or Sport+ mode is selected, the system switches to a more aggressive throttle map to enhance responsiveness.

Direct Ignition and Detonation/Knock Control
The TLX's Electronic Control Unit (ECU) monitors engine functions to determine the best ignition spark timing. Engine block-mounted acoustic detonation/knock sensors "listen" to the engine, and based on this input, the ECU can retard the ignition timing to prevent potentially damaging detonation. An ignition coil unit for each cylinder is positioned above each spark plug's access bore.
Close-Coupled Catalysts
The exhaust manifolds of both TLX engines are cast directly into the aluminum cylinder heads to reduce weight, decrease parts count, and create more underhood space. The result of this casting design is that the primary catalytic converters are positioned much closer to the combustion chambers, enabling extremely rapid converter "light-off" after engine start. A significant weight savings is realized by eliminating traditional exhaust manifolds.
Emissions Control
Both 2015 TLX engines meet the tough EPA Tier 2/Bin 5 and CARB LEV II ULEV emissions standards, and are certified to this level of emissions performance for 120,000 miles. A number of advanced technologies are factors in the emissions performance. The unique cylinder head-mounted close-coupled catalytic converters light off more quickly after engine start up, and a 32-bit RISC microprocessor within the Electronic Control Unit (ECU) boosts computing power to improve the precision of spark and fuel delivery.
Both engines feature Programmed Fuel Injection (PGM-FI) that continually adjusts the fuel delivery to yield the best combination of power, low fuel consumption and low emissions. Multiple sensors constantly monitor critical engine operating parameters such as intake air temperature, ambient air pressure, throttle position, intake airflow volume, intake manifold pressure, coolant temperature, exhaust-to-air ratios, as well as the position of the crankshaft and the camshafts.
Friction-Reducing Technologies
Both TLX engines make use of friction-reducing technologies designed to improve engine efficiency. The outer skirts of lightweight aluminum pistons feature a special coating that reduces overall friction as the pistons move within the cylinder bores. Plateau honing further lowers the friction level between the pistons and the cylinders by creating an ultra-smooth surface. Plateau honing is a 2-stage machining process that uses two grinding processes instead of the more conventional single honing process. This also enhances the long-term wear characteristics of the engine.
One-Touch Start System
To ensure consistent starting, the TLX has a one-touch start system that maintains starter engagement until the engine starts. Should the driver release the Start button before the engine starts, the system will start the vehicle. Simply push the Start button (with a foot on the brake pedal and the fob in the vehicle) and the engine will automatically start up.
100,000+/- Mile Tune-up Intervals
The TLX's engines no scheduled maintenance for 100,000+/- miles or more, other than periodic inspections and normal fluid and filter replacements. The first tune-up includes water pump inspection, valve adjustment, installation of new spark plugs, and in V-6 models, replacement of the camshaft timing belt.
Maintenance Minder™ System
To eliminate unnecessary service stops while ensuring that the vehicle is properly maintained, the TLX has a Maintenance Minder™ system that continually monitors the vehicle's operating condition. When maintenance is required, the driver is alerted via a message on the Multi-Information Display (MID).
The Maintenance Minder™ system monitors operating conditions such as oil and coolant temperature along with engine speed to determine the proper service intervals. Depending on operating conditions, oil change intervals can be extended to a maximum of 10,000 miles, potentially sparing the owner considerable expense and inconvenience over the life of the vehicle. The owner-resettable system monitors all normal service parts and systems, including oil and filter, tire rotation, air-cleaner, automatic transmission fluid, spark plugs, timing belt, coolant, brake pads and more. To mitigate the potential for driver distraction, maintenance alerts are presented on the MID only when the ignition is first turned on, not while driving.
Sequential SportShift 8-Speed Dual-Clutch Transmission (DCT) with Torque Converter
To maximize performance and fuel efficiency, the 2.4-liter TLX has a standard 8-Speed Dual-Clutch Transmission (DCT), the world's first transmission of this type to be paired with a torque converter. In the 8-speed DCT, one clutch controls the odd gears while the other clutch controls the even gears. This arrangement allows gear changes with a much smaller interruption in power to the wheels, resulting in millisecond-quick shifts. In addition, the DCT's efficient power transmission and wider overall ratio range contribute to the TLX's substantial gain in fuel efficiency compared to the outgoing TSX 4-cylinder.
Compared to a conventional manual transmission, the operation of the clutches and shifting mechanisms are electronically controlled, eliminating the need for a clutch pedal or manual shift lever. The DCT with its closely spaced ratios, ultra-quick shifts and automatic downshift rev-matching, gives the TLX 4-cylinder an exhilarating and sporty feel. The DCT transmission in the TLX also features a steering wheel-mounted paddle shifter system that lets the driver take manual control of transmission gear selection, further heightening the driving experience.
The ultra-thin torque converter complements the efficient operation of the DCT by providing exceptionally smooth operation in stop-and-go situations, plus it offers off-the-line torque multiplication for improved initial acceleration that a DCT alone can't equal. In an aggressive standing-start launch, the torque converter substantially improves acceleration in the first 1.4 seconds, or about the first 60 feet (as compared to a DCT alone).
Sequential SportShift 9-Speed Automatic Transmission
2015 TLX V-6 models are equipped with an all-new 9-speed automatic transmission featuring Sequential SportShift. The Sequential SportShift 9-speed automatic is 66 lbs. lighter than the 6-speed automatic in the previous TL, with more closely spaced gear ratios and 25 percent faster gear shifts that enhance performance and fuel efficiency.
The console-mounted shift lever is replaced with a fully electronic, shift-by-wire gear selector. Park, Neutral and Drive are selected with the push of a button. Reverse is selected by pulling back a dedicated switch. Indicator lights near the buttons indicate the mode selected. As an added safety feature, if the vehicle is brought to a stop in Drive, the system will automatically select Park if the driver's seatbelt is unbuckled and the driver's door is opened. A steering wheel-mounted paddle shifter system lets the driver take manual control of transmission gear selection.
Common Transmission Features
Cooperative Transmission Control

Both shift performance and smoothness are improved by cooperative control between the Drive-by-Wire throttle system and the two available transmissions. The engine is throttled by the engine management system during upshifts and downshifts; thus the function of the engine and transmission can be closely choreographed for faster, smoother shifting. As a result, the peak g-forces (or "shift shock") are reduced significantly during upshifts and downshifts.
Automatic Modes
Both TLX transmissions can be operated in two different, fully automatic modes, which are controlled by the Integrated Dynamics System (IDS) switch that is positioned on the center console. In Econ, Normal and Sport IDS modes, the transmission combines fuel efficiency with smooth operation and responsive power when needed. When the IDS is placed in Sport+ mode, the transmission switches to more aggressive mapping that puts the emphasis on performance-oriented driving, with higher engine rpm for greater acceleration and response.
Smart Transmission Logic
Both transmissions incorporate an advanced Grade Logic Control System, Shift Hold Control and Cornering G Shift Control — all of which reduce unwanted shifting and gear hunting. The result is smart transmission operation that optimizes fuel efficiency and keeps the transmission in the appropriate gear for driving conditions, generating excellent performance and smooth operation.
While ascending or descending hills, Grade Logic Control alters the transmission's shift schedule to reduce shift frequency and improve speed control. The transmission ECU continually measures throttle position, vehicle speed and acceleration/deceleration to determine when the vehicle is on a hill. The shift schedule is then adjusted — during ascents to hold the transmission in lower gears to boost climbing power, and during descents to provide greater engine braking.
Shift Hold Control keeps the transmission in its current (lower) gear ratio during aggressive driving, as in the case of decelerating at a corner entry. Shift Hold Control leaves the chassis undisturbed by eliminating excess shifting and ensures that power will be immediately available (without a downshift) at the corner exit. Cornering G Shift Control monitors the vehicle lateral acceleration to determine when the TLX is turning. When the system detects sufficient cornering speed, it will suppress any unwanted upshifts. This prevents the transmission from upshifting during a corner, which could upset the chassis balance thus requiring downshifting again at the corner exit when the throttle is applied.
Paddle Shifter Operation in Econ, Normal and Sport Integrated Dynamic System (IDS) Modes
While in Econ, Normal or Sport IDS modes, special transmission logic programming allows the use of the steering-wheel-mounted paddle shifters. When the driver operates the paddle shifters, the transmission responds to the driver's shift command and then returns to its normal fully automatic mode if further paddle shift inputs are not made within a given time. This special logic makes it easy for the driver to command a quick downshift without leaving the convenience of Drive mode.
Paddle Shifter Operation In Sport+ Mode
When the Integrated Dynamics System (IDS) is switched to the Sport+ mode, a pull on the racing-inspired paddle shifters (mounted on the steering wheel) places the transmission in fully manual mode until another mode of operation is selected. A digital display in the instrument cluster indicates which gear the transmission is in.
A double-kick-down feature lets the driver command a sport-minded double downshift — such as from Fifth to Third gear. By pulling on the left downshift paddle twice in rapid succession, the transmission will drop directly to the chosen lower gear ratio. The Drive-by-Wire throttle system also creates a "blip" of the throttle to help match gear speeds while downshifting.
To prevent harm to the powertrain when the transmission is paddle shifted by the driver (including during double-kick-down shifts), the system will inhibit potentially damaging shifts. As an added safety measure, the Electronic Control Unit (ECU) can also cut off fuel to the engine to prevent over-revving. If fuel cut-off is insufficient to prevent engine over-revving, as may be possible when the vehicle is on a steep downhill, the transmission will automatically upshift to prevent damage. On downshifts, the transmission will not execute a driver command that will over-rev the engine.
Front Wheel Drive
The TLX offers front wheel drive, paired with either a 4-cylinder or V-6 engine. With its efficient and lightweight design, the TLX front wheel drive system makes a significant contribution to overall fuel efficiency.
The latest version of Acura's Precision All-Wheel Steer™ (P-AWS) is standard on all front-wheel drive TLX models, and helps give the TLX best-in-class dynamic performance at all speeds. See the Chassis section for more information on P-AWS.
The system is complemented by Agile Handling Assist, which employs the anti-lock brake system to individually brake either the left or right rear wheel to reduce yaw delay (the period between steering wheel input and the rotation of the body) to improve corner traceability and balance. (See Chassis section for more information.)
Super-Handling All-Wheel Drive™ (SH-AWD®)
The TLX SH-AWD features a new hydraulically controlled iteration of Acura's acclaimed Super Handling All-Wheel Drive™ (SH-AWD®), which progressively distributes optimum torque not only between the front and rear axles, but also between the left and right rear wheels. Like its P-AWS counterpart, the TLX SH-AWD system is complemented by Agile Handling Assist.
The benefits of the SH-AWD system are superior all-weather handling and neutral, accurate steering under power that is unmatched by front-drive, rear-drive or conventional all-wheel-drive systems.
By rotating the outside rear wheel faster than the front axle while cornering, SH-AWD uses torque vectoring to create a yaw moment to help turn the vehicle through the corner — reducing understeer and improving controllability. With cornering forces more evenly distributed between front and rear tires, overall cornering power is increased — on wet or dry roads.
Vehicles with high power ratings using conventional front or rear drive systems often employ a limited-slip differential to help maintain traction when under power. By linking inside and outside drive wheels, these systems tend to resist turning and can increase understeer. Conventional AWD systems similarly work to link the inboard and outboard tires as well as the front and rear axles, which can create resistance to turning. Using torque vectoring to help turn the vehicle, SH-AWD delivers more responsive, neutral and predictable handling performance while providing outstanding all-weather traction and control.
Controls and Parameters — The SH-AWD system works in cooperation with the TLX's Vehicle Stability Assist™ (VSA®) system and Agile Handling Assist to optimize torque distribution for superior handling and traction utilization. The Electronic Control Unit (ECU) provides information on engine torque, airflow and transmission gear-ratio selection, while the VSA ECU provides wheel-speed data. The SH-AWD ECU also monitors steering angle, steering angle rate of change, lateral G-forces, vehicle yaw rate and hydraulic clutch pressure for the right and left rear axle shafts. Drive torque is calculated from ECU information, and then the acceleration situation, wheel spin, lateral G-force, steering angle and steering angle rate-of-change are used to determine the front-to-rear torque distribution and the torque split between right and left rear wheels.
SH-AWD operating parameters include:
Up to 90-percent of available torque can be transferred to the front wheels during normal cruising.
In hard cornering and under acceleration, up to 70-percent of available torque can be directed to the rear wheels to enhance vehicle dynamics.
Up to 100-percent of the torque sent to the rear axle can be applied to either the left or right rear wheel, depending on conditions.
SH-AWD System Layout — The TLX SH-AWD is a full-time all-wheel-drive system that requires no driver interaction or monitoring, thanks to a torque-transfer unit that is bolted directly to the front-mounted transaxle. The torque-transfer unit receives torque from a helical gear that is attached to the front differential's ring gear, and a short horizontal shaft and hypoid gear set within the torque-transfer unit's case send power to the rear propeller shaft, which in turn transfers power to the rear drive unit.
The TLX's new, more lightweight (25 percent reduction) SH-AWD rear drive unit is constantly overdriven by 2.7-percent (the previous generation TL system was overdriven by 1.7-percent). The resulting overdrive effect is regulated by left- and right-side clutch packs (located in the rear differential) that independently control the power delivered to each rear wheel. The increased overdrive percentage in the new TLX means that the torque vectoring effect is more pronounced and effective even in corners with a radius of as little as 49.2 feet (15 meters). This means that torque vectoring can be felt more often, such as when accelerating aggressively through a standard corner. Up to 885 lb.-ft. of torque can be delivered to either rear wheel, which gives the system the unique ability to yaw the TLX into turns for superior handling.
Hydraulically operated clutch systems mounted on either side of the hypoid gear that drives the rear axles control the amount of torque sent to each rear wheel and provide a limited-slip differential function when needed. The clutches can be controlled as a pair to alter front/rear torque split or they can be controlled independently to allow 100-percent of available rear axle torque to go to just one rear wheel.
In this new iteration of SH-AWD, a single electric motor powers a pair of hydraulic pumps — one for each clutch pack. An Electronic Control Unit (ECU) controlled linear solenoid valve selectively sends pressure to the clutch packs, which in turn control the amount of power sent to each rear wheel. This new hydraulic system eliminates the magnets, coils and other components of the previous electromechanical SH-AWD system to realize a substantial weight savings
The clutch packs and their friction material are carefully designed to withstand the small amount of continuous slip between front and rear axles created by the 2.7-percent speed differential — all while delivering the durability expected of an Acura product.
 
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