Among the battery electric vehicles (BEV) a trend towards all-wheel drive (AWD) is visible and the AWD market share is going to grow significantly within the next years. For this reason, it is important to find a way how to increase the overall powertrain efficiency. One possible solution is to disconnect the secondary axle every time the driver demand doesn’t require it to be active. We call this solution eConnect. In this work, different eConnect solutions for AWD BEV and their advantages in terms of efficiency are discussed. In the most AWD BEV (with two electrified axles) the primary axle is used to cover most of the common driving situations. The secondary axle (also boost axle) is activated only for a low percentage of the vehicle lifetime in order to achieve better acceleration or to fulfill particular use cases. It is proven that disconnecting the secondary axle reduces the drag torques and significantly increases the powertrain overall efficiency, increasing the vehicle electric range. This is true also for secondary axles with ASM. ZF is working on different eConnect solution in order to fulfill the customer requirements in terms of performance and costs. One of these solutions was already implemented in a vehicle as a prototype with good results.
ZF eConnect: Efficient Solutions for AWD BEV
Proceedings
International Conference on Drives and energy systems of tomorrow ; 2022 ; Berlin, Deutschland May 10, 2022 - May 11, 2022
2023-08-29
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Deutsch
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