Torque Optimal Allocation Strategy of All-Wheel Drive Electric Vehicle Based on Difference of Efficiency Characteristics between Axis Motors

Xiaogang Wu, Dianyu Zheng, Tianze Wang and Jiuyu Du
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Xiaogang Wu: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, Heilongjiang, China
Dianyu Zheng: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, Heilongjiang, China
Tianze Wang: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, Heilongjiang, China
Jiuyu Du: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China

Energies, 2019, vol. 12, issue 6, 1-16

Abstract: All-wheel drive is an important technical direction for the future development of pure electric vehicles. 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, proposes a dynamic allocation method to realize the torque distribution of electric vehicle all-wheel drive power system, and analyzes and verifies the adaptability of this optimization algorithm in different urban passenger vehicle working cycles. 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% and 5.69%, respectively, compared with the average distribution method under the China urban passenger driving cycle and the Harbin urban passenger driving cycle.

Keywords: electric vehicle; all-wheel drive; dynamic planning; torque distribution; drive efficiency; drive efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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