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Torque Coordination Control of an Electro-Hydraulic Composite Brake System During Mode Switching Based on Braking Intention

Author

Listed:
  • Yang Yang

    (State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China
    School of Automotive Engineering, Chongqing University, Chongqing 400044, China)

  • Yundong He

    (School of Automotive Engineering, Chongqing University, Chongqing 400044, China)

  • Zhong Yang

    (Chongqing Changan Automobile Co., Ltd., Chongqing 400023, China)

  • Chunyun Fu

    (State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China
    School of Automotive Engineering, Chongqing University, Chongqing 400044, China)

  • Zhipeng Cong

    (School of Automotive Engineering, Chongqing University, Chongqing 400044, China)

Abstract

The electro-hydraulic composite braking system of a pure electric vehicle can select different braking modes according to braking conditions. However, the differences in dynamic response characteristics between the motor braking system (MBS) and hydraulic braking system (HBS) cause total braking torque to fluctuate significantly during mode switching, resulting in jerking of the vehicle and affecting ride comfort. In this paper, torque coordination control during mode switching is studied for a four-wheel-drive pure electric vehicle with a dual motor. After the dynamic analysis of braking, a braking force distribution control strategy is developed based on the I-curve, and the boundary conditions of mode switching are determined. A novel combined pressure control algorithm, which contains a PID (proportional-integral-derivative) and fuzzy controller, is used to control the brake pressure of each wheel cylinder, to realize precise control of the hydraulic brake torque. Then, a novel torque coordination control strategy is proposed based on brake pedal stroke and its change rate, to modify the target hydraulic braking torque and reflect the driver’s braking intention. Meanwhile, motor braking torque is used to compensate for the insufficient braking torque caused by HBS, so as to realize a smooth transition between the braking modes. Simulation results show that the proposed coordination control strategy can effectively reduce torque fluctuation and vehicle jerk during mode switching.

Suggested Citation

  • Yang Yang & Yundong He & Zhong Yang & Chunyun Fu & Zhipeng Cong, 2020. "Torque Coordination Control of an Electro-Hydraulic Composite Brake System During Mode Switching Based on Braking Intention," Energies, MDPI, vol. 13(8), pages 1-19, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:8:p:2031-:d:347623
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    References listed on IDEAS

    as
    1. Yang Yang & Chao Wang & Quanrang Zhang & Xiaolong He, 2017. "Torque Coordination Control during Braking Mode Switch for a Plug-in Hybrid Electric Vehicle," Energies, MDPI, vol. 10(11), pages 1-16, October.
    2. Qiu, Chengqun & Wang, Guolin & Meng, Mingyu & Shen, Yujie, 2018. "A novel control strategy of regenerative braking system for electric vehicles under safety critical driving situations," Energy, Elsevier, vol. 149(C), pages 329-340.
    3. Wu, Jian & Wang, Xiangyu & Li, Liang & Qin, Cun'an & Du, Yongchang, 2018. "Hierarchical control strategy with battery aging consideration for hybrid electric vehicle regenerative braking control," Energy, Elsevier, vol. 145(C), pages 301-312.
    4. Yang Yang & Guangzheng Li & Quanrang Zhang, 2018. "A Pressure-Coordinated Control for Vehicle Electro-Hydraulic Braking Systems," Energies, MDPI, vol. 11(9), pages 1-21, September.
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    Cited by:

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    2. He, Qiang & Yang, Yang & Luo, Chang & Zhai, Jun & Luo, Ronghua & Fu, Chunyun, 2022. "Energy recovery strategy optimization of dual-motor drive electric vehicle based on braking safety and efficient recovery," Energy, Elsevier, vol. 248(C).
    3. Marian Janusz Łopatka & Karol Cieślik & Piotr Krogul & Tomasz Muszyński & Mirosław Przybysz & Arkadiusz Rubiec & Kacper Spadło, 2023. "Research on Terrain Mobility of UGV with Hydrostatic Wheel Drive and Slip Control Systems," Energies, MDPI, vol. 16(19), pages 1-22, October.
    4. Zhang, Junjiang & Yang, Yang & Hu, Minghui & Yang, Zhong & Fu, Chunyun, 2021. "Longitudinal–vertical comprehensive control for four-wheel drive pure electric vehicle considering energy recovery and ride comfort," Energy, Elsevier, vol. 236(C).

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