ZF is successfully collaborating with British electric vehicle manufacturer Tevva on the development of the regenerative braking system for its 7.5t electric truck. This involved close collaboration between ZF and Tevva engineers to integrate ZF’s electronic braking system (EBS) into Tevva’s zero-emission electric truck.
Tevva engineers successfully met a rigorous set of test criteria for the company’s truck and worked to fine-tune the electric truck’s vehicle control unit (VCU) and improve compatibility with the EBS. The result is a system that recuperates up to four times more energy than a conventional air braking system, optimizing the Tevva truck’s range. The implementation of EBS allows safe inclusion of recuperative braking up to 180 kW, whereas the passive regeneration of the conventional air brake system was limited to about 40 kW for safety reasons. Testing of the adapted system, which took place on the ZF test track in Jeversen, included a wide range of conditions, gradients and surface types.
Technological advances allow a modern EBS system to control the mix of friction braking with the electric motor to reduce brake wear. The system electronically transmits the driver’s deceleration request to all braking system components to reduce reaction time, balance braking forces and provide light braking and efficient brake management.
Tevva began volume production for its 7.5t battery electric vehicle (BEV) this year at the company’s London facility. A 7.5t hydrogen electric truck is to follow, benefiting from a hydrogen range extender that extends the range to 570km. Tevva’s 7.5t battery electric vehicle offers a range of up to 227 kilometers on a single charge of its 105 kWh battery, making it particularly suitable for so-called “last mile” and inner-city delivery fleet operations. www.zf.com