Comparison of Torque Management Solution for Battery Electric Vehicles

Authors

M. Magnusson, P. Peterson, G. Domingues - BorgWarner Sweden, K. van Maanen - BorgWarner US, A. Bongards, W. Wenzel - BorgWarner Stuttgart GmbH

Summary

The growing market for electric vehicles is driven by a pull from the market and a push by the regulators for lower CO2 emissions or fuel consumption. The variety of EV models on the market is increasing, offering various propulsion architectures for different segments and performance levels. These architectures consist of one or two driven axles, each based on so-called integrated drive modules (iDMs), including an electric motor (EM), the inverter, and the transmission. In all-wheel-drive (AWD) architectures, the two driven axles can be controlled independently, which provides opportunities to improve vehicle dynamics, as the torque distributions between the axles can be changed to affect steering or even overrunning an axle in certain driving conditions. However, for both single-axle driven or AWD vehicles, the dynamic performance can be improved by adding various torque management systems (TMS), which allow to alter the amount of torque that each of the wheels in an axle receives in different driving conditions.
...