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A Pressure-Coordinated Control for Vehicle Electro-Hydraulic Braking Systems

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Listed:
  • Yang Yang

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

  • Guangzheng Li

    (State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
    College of Mechanical Engineering, Chongqing University, Chongqing 400044, China)

  • Quanrang Zhang

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

Abstract

The characteristics of electro-hydraulic braking systems have a direct influence on the fuel consumption, emissions, brake safety, and ride comfort of hybrid electric vehicles. In order to realize efficient energy recovery for ensuring braking safety and considering that the existing electro-hydraulic braking pressure control systems have control complexity disadvantages and functional limitations, this study considers the front and rear dual-motor-driven hybrid electric vehicle as the prototype and based on antilock brake system (ABS) hardware, proposes a new braking pressure coordinated control system with electro-hydraulic braking function and developed a corresponding control strategy in order to realize efficient energy recovery and ensure braking safety, while considering the disadvantages of control complexity and functional limitations of existing electro-hydraulic system. The system satisfies the pressure coordinated control requirements of conventional braking, regenerative braking, and ABS braking. The vehicle dynamics model based on braking control strategy and pressure coordinated control system is established, and thereafter, the performance simulation of the vehicle-based pressure coordinated control system under typical braking conditions is carried out to validate the performance of the proposed system and control strategy. The simulation results show that the braking energy recovery rates under three different conditions—variable braking intensity, constant braking intensity and integrated braking model—are 66%, 55% and 47%. The battery state of charge (SOC) recovery rates are 0.37%, 0.31% and 0.36%. This proves that the motor can recover the reduced energy of the vehicle during braking and provide an appropriate braking force. It realizes the ABS control function and has good dynamic response and braking pressure control accuracy. The simulation results illustrate the effectiveness and feasibility of the program which lays the foundation for further design and optimization of the new regenerative braking system.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2336-:d:167764
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    Citations

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    Cited by:

    1. 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.
    2. Yuqi Fan & Junpeng Shao & Guitao Sun & Xuan Shao, 2020. "Proportional–Integral–Derivative Controller Design Using an Advanced Lévy-Flight Salp Swarm Algorithm for Hydraulic Systems," Energies, MDPI, vol. 13(2), pages 1-20, January.

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