• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2019, Vol. 55 ›› Issue (22): 21-32.doi: 10.3901/JME.2019.22.021

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Configuration, Parameter Matching and Energy Efficiency Analysis of the Layered Coupled Electric Drive Applied for Vehicles

CHEN Xianbao1,2, SHU Hongyu1,2, SONG Yitong1,2, ZHANG Fusen1,2   

  1. 1. State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044;
    2. School of Automotive Engineering, Chongqing University, Chongqing 400044
  • Received:2019-08-26 Revised:2019-11-16 Online:2019-11-20 Published:2020-02-29

Abstract: Anovel vehicle layered coupled electric drive configuration is proposed, which is composed of the front and rear axle torque coupling in the upper layer and the dual-motor speed coupling in the electric wheel in the lower layer. The configuration and working modes of the layered coupled electric drive are described in detail. Based on the dynamic performance indexes and cycle conditions, the peak/common power demand of the vehicle is statistically analyzed, and then the peak/rated performance of the layered coupled electric drive is determined. Based on the mode switching strategy with the best energy efficiency, the equivalent MAP characteristics of the vehicle with the layered coupled electric drive are obtained. The vehicle efficiency performance of the layered coupled electric drive and conventional single motor hub drive are compared and analyzed. The analysis results show that the proposed layered coupled electric drive configuration can effectively broaden the vehicle's efficient operating region, realize the wide range of torque-speed efficient driving, and evidently improve the vehicle economy.

Key words: vehicle layered coupled electric drive, wide-domain efficient, dual-motor electric wheel, torque coupling, speed coupling, peak/common power requirements of the vehicle

CLC Number: