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Automotive Engineering ›› 2020, Vol. 42 ›› Issue (11): 1506-1512.doi: 10.19562/j.chinasae.qcgc.2020.11.008

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Research on Parallel Braking Control of Distributed Four-wheel-drive Electric Vehicle

Zhu Shaopeng1, Jiang Xudong1, Wang Yanran1, Ye Xingyu1, Yu Kai1, Xu Linfeng2   

  1. 1. Power Machinery & Vehicular Engineering Institute, College of Energy Engineering,Zhejiang University,Hangzhou 310058;
    2. Shanghai Shenlong Bus Co., Ltd., Shanghai 201108
  • Received:2020-01-20 Online:2020-11-25 Published:2021-01-25

Abstract: Considering the engineering application requirements of regenerative braking system, a distributed parallel braking control strategy is proposed for distributed four-wheel-drive electric vehicle, which mainly focuses on braking safety and stability, while taking into account braking economy. The strategy adopts a hierarchical control structure, including the desired yaw moment formulation layer, the four-wheel electric braking force distribution layer and braking force constraint layer. Based on the direct yaw moment control, the designed parallel braking control strategy optimizes the braking stability of the vehicle, and comprehensively considers the constraints such as braking strength, battery SOC value, and vehicle speed to improve the braking economy. Finally, a real vehicle test is carried out to verify the effectiveness of the designed parallel braking control strategy under the conditions of right angle turn braking and single lane change braking

Key words: electric vehicle, distributed parallel braking, braking stability, braking energy recovery, real vehicle test