GKN trials EV with two-speed transmission and front-axle torque-vectoring

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GKN Automotive unveiledthe first battery-electric automobile (BEV) with a two-speed transmission and torque vectoring on the entrance axle. Primarily based on an ordinary Jeep Renegade, the GTD19 demonstrator automobile is present process testing at GKN’s annual winter testing program in Arjeplog, Sweden, and showcases how automakers can use drivetrain improvements to attain industry-leading requirements of effectivity, -safety and driving dynamics in BEV fashions.


The GTD19 is provided with an optimized two-speed Seamless shift eTransmission and sensible shifting technique, which has the potential to increase automobile vary in addition to present larger torque, acceleration and a better prime pace. Effectivity is additional enhanced by the GTD19’s eAxle’s coaxial format, whereas distinctive stability and dynamic efficiency is feasible because of the torque vectoring functionality of GKN’s eTwinster system. (Earlier put up.)

This new expertise demonstrator showcases how we’re evolving and bettering built-in eDrive applied sciences to assist OEMs additional enhance effectivity, security and driving dynamics.

Throughout the final 12 months, we now have seen a 40% improve within the worth of our eDrive order guide, rising from £2 billion on the finish of 2017 to confirmed enterprise now value £three billion. Our devoted deal with manufacturing and improvement of electrified drivelines will allow us to assist the speedy acceleration in demand for BEVs outfitted with all-wheel drive techniques within the coming years.

—Hannes Prenn, COO of GKN ePowertrain

The expertise within the GTD19 is expounded to the two-speed expertise in final 12 months’s GTD18 Mercedes-AMG GLA 45 take a look at automobile, which demonstrated the advantages of an eTwinster rear axle e-motor, two-speed eTransmission and torque vectoring by twin clutches; paired with a mechanical Twinster on the entrance axle.

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The set-up in GTD19 supplies pure electrical energy with two-speeds. The electrical two-speed gearbox is configured to make sure the shifts are seamless, with minimal losses in energy and torque and the potential for quicker acceleration, improved effectivity and a better prime pace.

GKN’s award-winning Twinster torque vectoring expertise delivers particular benefits for automobile stability, agility and security. Aiding modulation of the excessive preliminary torque of the electrical motor, Twinster governs acceleration making it swift and clean, whereas additionally offering larger lateral management and optimized front-wheel driving dynamics for each security and driver satisfaction.

The superior eDrive system within the GTD19 replaces the Jeep Renegade’s inner combustion engine with a 120kW GKN e-motor, delivering most torque of three,500 N·m and vectoring of as much as 2,000 N·m to both of the entrance wheels when required.


Entrance-wheel drive functions of torque vectoring present extra noticeable advantages than rear- or all-wheel drive configurations, because of the relative ease of breaking traction in a front-wheel drive automotive. Not solely can the Twinster system preserve the entrance wheels in test throughout acceleration, it may appropriate an understeer yaw second skilled by a driver getting into a nook at pace.

The system prioritizes torque supply to the outer wheel serving to to appropriate the pure understeer attribute usually related to a entrance drive automobile.

Considerably smaller than techniques with equal energy outputs, the eTwinster two-speed coaxial system could be simply built-in into current automobile platforms. It’s readily adaptable to be used in front-wheel drive, rear-wheel drive or all-wheel drive functions extending from entry-level electrical metropolis vehicles to plug-in hybrid luxurious SUVs and absolutely electrical all-wheel drive hypercars.

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For the GTD19, all of the drivetrain expertise was built-in with ease into the present automobile platform with out main modification, together with each a GKN-derived electrical motor and GKN-developed inverter controls, supplementing the corporate’s superior eAxle. All software program is programmed by GKN to allow seamless shifting of the two-speed transmission and torque management on the entrance axle, with minimal energy and torque loss throughout adjustments.

GKN has pioneered superior eDrive expertise since 2002, buying techniques integration and manufacturing expertise to switch the expertise from area of interest automobiles to high-volume mass-market functions. It has already provided full eDrive techniques to plug-in hybrid applications for OEMs together with BMW, Mitsubishi, Porsche and Volvo.


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