Tire-Slip Start Detection Using Sign of Rotation Jerk on Occurring Resonance of Automotive Drivetrains

Abstract

This paper proposes a slip detection method for inverters of a BEV (Battery Electric Vehicle), which drives a vehicle by one traction motor with a differential gear and driveshafts. It is observed that the sign (positive/negative) of motor rotation jerk differs when tire slip happens. Based on this phenomenon, the proposed slip detection method determines the start of tire slip when motor rotation jerk of a while after oscillation occurs is positive values dominantly. According to vehicle dynamics simulation, it is verified that the method can detect slip start after actual slip occurs earlier than the former slip detection method.