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Regenerative Braking Compensatory Control Strategy Considering CVT Power Loss for Hybrid Electric Vehicles

Author

Listed:
  • Yang Yang

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

  • Xiaolong He

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

  • Yi Zhang

    (Department of Mechanical Engineering, University of Michigan-Dearborn, Dearborn, MI 48128, USA)

  • Datong Qin

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

Abstract

Hybrid electric vehicles (HEV) equipped with continuously variable transmission (CVT) adjust the motor operating point continuously to achieve the optimal motor operating efficiency during regenerative braking. Traditional control strategies consider the CVT efficiency as constant, while the CVT efficiency varies in different operating conditions. In order to reflect the transmission efficiency more accurately during regenerative braking, the CVT theoretical torque loss model is firstly established which then leads to the battery–front motor–CVT joint operating efficiency model. The joint operating efficiency model indicates that the system efficiency is influenced by input speed, input torque, CVT speed ratio, and battery SOC (state of charge). The compensatory strategy for the front motor barking force is proposed to make full use of its braking power and the CVT speed ratio control strategy is modified to maintain the optimal operating efficiency of the system. The simulations are performed under three typical braking conditions and UDDS, NYCC, US06 respectively, the results show that the modified control strategy increases the front motor braking power and improves the system operating efficiency.

Suggested Citation

  • Yang Yang & Xiaolong He & Yi Zhang & Datong Qin, 2018. "Regenerative Braking Compensatory Control Strategy Considering CVT Power Loss for Hybrid Electric Vehicles," Energies, MDPI, vol. 11(3), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:497-:d:133534
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    References listed on IDEAS

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    1. Guoqing Xu & Weimin Li & Kun Xu & Zhibin Song, 2011. "An Intelligent Regenerative Braking Strategy for Electric Vehicles," Energies, MDPI, vol. 4(9), pages 1-17, September.
    2. Li, Liang & Wang, Xiangyu & Xiong, Rui & He, Kai & Li, Xujian, 2016. "AMT downshifting strategy design of HEV during regenerative braking process for energy conservation," Applied Energy, Elsevier, vol. 183(C), pages 914-925.
    3. Li, Liang & Li, Xujian & Wang, Xiangyu & Song, Jian & He, Kai & Li, Chenfeng, 2016. "Analysis of downshift’s improvement to energy efficiency of an electric vehicle during regenerative braking," Applied Energy, Elsevier, vol. 176(C), pages 125-137.
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    Cited by:

    1. Yang, Chao & Sun, Tonglin & Wang, Weida & Li, Ying & Zhang, Yuhang & Zha, Mingjun, 2024. "Regenerative braking system development and perspectives for electric vehicles: An overview," Renewable and Sustainable Energy Reviews, Elsevier, vol. 198(C).
    2. Nena Apostolidou & Nick Papanikolaou, 2018. "Energy Saving Estimation of Athens Trolleybuses Considering Regenerative Braking and Improved Control Scheme," Resources, MDPI, vol. 7(3), pages 1-18, July.
    3. Yang Yang & Qiang He & Yongzheng Chen & Chunyun Fu, 2020. "Efficiency Optimization and Control Strategy of Regenerative Braking System with Dual Motor," Energies, MDPI, vol. 13(3), pages 1-21, February.
    4. Hyung-jin Do & Se-hoon Oh, 2022. "CVT for a Small Electric Vehicle Using Centrifugal Belt Pulley," Energies, MDPI, vol. 15(23), pages 1-15, November.
    5. Hu, Jianjun & Mei, Bo & Peng, Hang & Guo, Zihan, 2019. "Discretely variable speed ratio control strategy for continuously variable transmission system considering hydraulic energy loss," Energy, Elsevier, vol. 180(C), pages 714-727.

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