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[Due to the increasing size of the archives, each topic page now contains only the prior 365 days of content. Access to older stories is now solely through the Monthly Archive pages or the site search function.]

Mitsubishi e-Evolution concept features three-motor powertrain with new Dual Motor active yaw control

October 05, 2017

Mitsubishi Motors Corporation (MMC) will stage the world debut of the e-Evolution Concept—a new-generation, high-performance all-electric crossover SUV—at the 45th Tokyo Motor Show, indicating a direction Mitsubishi Motors can take in the near future.

The triple-motor 4WD system employs a single motor to drive the front wheels, and a new Dual Motor AYC system that couples the two rear motors through an electronically controlled torque-vectoring Active Yaw Control (AYC) unit. Whether driving around town, on expressways, or winding roads, the system always provides crisp and nimble handling that faithfully mirrors driver intent. (Audi is also featuring a three-motor all-wheel drive system on its coming e-tron SUVs, earlier post.)

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GKN Driveline introducing new advanced electric driveline concept with torque vectoring at Frankfurt: eTwinsterX

September 11, 2017

GKN Driveline will reveal a new electric axle concept at the Frankfurt International Motor Show (IAA) this week. The new eAxle eTwinsterX offers three key advantages over conventional electric drivelines, GKN says: size, efficiency and torque vectoring.

The integrated coaxial format means that the electric drive (eDrive) unit is significantly smaller than other systems with equivalent power outputs. Its size also contributes to its adaptability to suit any vehicle type, from city cars to luxury plug-in hybrid SUVs, whether front-wheel drive, rear-wheel drive or all-wheel drive. The technologies within the eTwinsterX system also mean that it is the first eAxle to offer full off-road capabilities.

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Audi A8 features new dynamic all-wheel steering, AI active suspension

July 17, 2017

Audi’s new A8 is a technology showcase for the brand, from powertrains (earlier post) and materials (earlier post) to autonomous driving and advanced driver assistance systems (earlier post).

The A8 also features two new technologies for the suspension. New dynamic all-wheel steering combines direct, sporty steering with unshakable stability. The steering ratio for the front wheels varies as a function of speed; the rear wheels are turned in or against the direction of steering depending on the speed range. The car’s handling becomes even more dynamic and precise with the sport differential. This actively distributes the drive torque between the rear wheels, complementing the quattro permanent all-wheel drive that is now standard in the new A8.

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Audi A8 fully active electromechanical suspension powered by 48V electrical system; predictive adjustment using front camera

June 22, 2017

The new Audi A8 will feature a fully active, electromechanical suspension system which drives each wheel individually and adapts to the prevailing road conditions. Each wheel has an electric motor which is powered by the A8’s 48-volt electrical system—used for the first time as the main electrical system. (The Audi SQ7 TDI introduced in 2016 offered a 48V subsystem as well as a 12V system for the alternator. Earlier post. The new A8 also features a 48V mild hybrid capability (mHEV).)

Additional components include gears, a rotary tube together with internal titanium torsion bar and a lever which exerts up to 1,100 Nm (811.3 lb-ft) on the suspension via a coupling rod. The new Audi A8 makes its world debut at the Audi Summit in Barcelona on 11 July.

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Audi unveils 2nd battery-electric Audi concept in Shanghai; production in 2019; 3-motor “e-quattro” drive

April 18, 2017

Audi is unveiling a new battery-electric e-tron concept in Shanghai: the Audi e-tron Sportback. The production version will come in 2019 as Audi’s second battery-electric offering, following the introduction of the production version of the Audi e-tron SUV (earlier post) in 2018.

The e-tron Sportback uses a three-motor, all-wheel-drive system that will also be adopted in future production Audi models with all-electric drive: one electric motor on the front axle and two on the rear powering all four wheels, transforming the high-performance coupé into an e-quattro. The 320 kW of system power—370 kW in boost mode—propels the electric Sportback 0 to 100 km/h (62.1 mph) in 4.5 seconds. With the battery’s energy content of 95 kilowatt-hours, range is in excess of 500 kilometers (310.7 miles) (NEDC).

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New Opel Insignia to offer torque-vectoring all-wheel drive with Twinster system

January 11, 2017

The all-new Opel Insignia Grand Sport, arriving in the market early this year, will be available with a torque vectoring all-wheel drive system. The new Opel Insignia uses a GKN Twinster all-wheel drive system with a rear drive module that uses a twin clutch system without differential. The two clutches distribute torque between the front and rear axle and between the two rear wheels.

Torque vectoring provides intelligent control of the vehicle dynamics by sending precise amounts of torque to individual wheels; by over-speeding the outside wheel in a corner, torque vectoring can induce a yaw-moment, helping steer the vehicle. Conventional torque vectoring systems use a set of planetary gears either side of the differential to achieve only very low levels of over-speeding. Other systems use braking to achieve a similar effect—but waste energy and slow the vehicle in the process.

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Audi TT 2.0 TDI diesel now also available with quattro all-wheel-drive

December 08, 2016

Audi is introducing a quattro all-wheel-drive version of its diesel Audi TT 2.0. (Earlier post.) The new model is now on sale in Europe, and will be available for delivery from the beginning of 2007. Coupled to the S tronic six-speed dual-clutch transmission, the sporty TT diesel quattro Coupé delivers fuel consumption of 5.2 l/100 km (45.2 US mpg) according to the NEDC measuring method, which equates to 137 grams of CO2 per kilometer (220.5 g/mi). The TT Roadster figures are 5.4 l/100 km (43.6 US mpg) and 142 g CO2 per kilometer (228.5 g/mi).

Audi said that one in two Audi TTs sold worldwide is a quattro. The quattro drive uses an electro-hydraulic multi-plate clutch to distribute the torque to both axles. In many everyday driving situations, it will direct the engine’s power predominantly to the front wheels. Should traction decrease there, the clutch continuously redirects the torque to the rear within a few milliseconds.

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Dana introducing Spicer Electrified family of e-axles for hybrid, electric vehicles

November 09, 2016

Dana Incorporated introduced the Spicer Electrified family of fully integrated motor, control, and e-drive technologies that advance electric propulsion systems for light-duty, commercial, and off-highway vehicles.

Currently in production, the Spicer EV Drive for electric vans manages speed and torque from the e-motor to the wheels. Planned for launch in 2018, Dana’s new e-axles for electric transit buses and city delivery vehicles feature a fully integrated motor and gear box and leverage the company’s experience in chassis drivetrain applications.

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