evTrailer 2 – Autonomous Electric Drive Collaboration System for Truck Trailers and Vehicle Trailers

Period: 2022 – 2025


CuroCon GmbH,

TU Darmstadt (Institut für Verbrennungskraftmaschinen und Fahrzeugantriebe – vkm),

Fraunhofer LBF,

Oswald Elektromotoren GmbH,

Schwarzmüller GmbH,

Sono Motors GmbH,

Hüffermann Transportsysteme GmbH

Support: Bundesministerium für Wirtschaft und Klimaschutz,

Project Sponsor: DLR

The collaborative research project “evTrailer2” deals with the electrification of semi-trailers. This is intended to relieve the tractor unit and thus reduce CO2 emissions. This can significantly improve the ecological balance of the entire vehicle type. Specifically, a reduction in greenhouse gas emissions of 30% is planned.

At the IMS, the powertrain and, in particular, an innovative and multi-stage gearbox are being developed for this purpose. This makes it possible to achieve a balance between high starting torques and maximum efficiency at increased speeds. The concept envisages a distributed drive system that can independently drive the left and right sides of the semi-trailer. In this context, the effect of “skid steering” is being investigated at low speeds to enable autonomous driving of the semi-trailer. At higher speeds, however, “torque vectoring” is enabled, thereby increasing safety during the journey.

An innovative shifting system based on claw clutches is being developed for gear shifting. A redundant and novel sensor concept enables angle-precise shifting at every operating point, thereby minimizing stresses on the gearbox and offering increased driving comfort at the same time.

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