Research on torque compensation control strategy for four-wheel drive hybrid system in rapid acceleration

Abstract

This paper is based on the ground coupled four-wheel drive hybrid system with “BSG system of front axle and motor drive of rear axle”, the torque compensation control strategy under the condition of rapid acceleration is researched. The strategy determines the driver's intention according to the acceleration pedal opening and change rate, then calculate the compensation torque with consideration of the limitation of jerk on the compensation torque by fuzzy control. Based on the maximum utilization of ground adhesion, the compensation torque is allocated. The simulation model is built under the Matlab/Simulink environment. The simulation results show that this strategy can effectively recognize the drivers' demand for rapid acceleration, improve the dynamic performance of the whole vehicle under the premise of satisfying the ride comfort and handling stability of the vehicle.