Torque Optimal Allocation Strategy of All-wheel Drive Electric Vehicle

Abstract

The difference in the efficiency distribution of the shaft motor caused by the optimal load matching and motor manufacturing process, the traditional torque average distribution strategy is not applicable to the torque distribution of the all-wheel drive power system. Aiming at the above problems, this paper takes the energy efficiency of power system as the optimization goal, and proposes a dynamic allocation method to realize the torque distribution method of electric vehicle all-wheel drive power system, and analyzes and verifies the adaptability of this optimization algorithm in China urban passenger vehicle working conditions. The simulation results show that compared with the torque average distribution method, the proposed method can effectively solve the problem that the difference of the efficiency distribution of the two shaft motors in the power system affects the energy consumption of the power system. The energy consumption rate of the proposed method is reduced by 5.96%, respectively, compared with the average distribution method under the urban road driving condition of Chinese passenger vehicles.