A Novel Braking Control Strategy for Hybrid Electric Buses Based on Vehicle Mass and Road Slope Estimation

Chinese Journal of Mechanical Engineering

Original Article

Jinzhao Liu¹  Huawei Liang²  Liang Li³  Zijun Liu³  Shuo Cheng³  Qiong Wu⁴ 

[1] Beijing Forestry University, 100091, Beijing, China;Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 230088, Hefei, China;State Key Laboratory of Automotive Safety and Energy, Tsinghua University, 100084, Beijing, China;University of Science and Technology, 230026, Hefei, China;Institute of Applied Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 230088, Hefei, China;

关键词: Hybrid electric bus;    Vehicle mass estimation;    Road slope estimation;    Braking control strategy;    Regenerative braking;   

DOI  :  10.1186/s10033-022-00823-z

 received in 2022-11-10, accepted in 2022-11-17,  发布年份 2022

来源: Springer

【 摘 要 】

Proper braking force distribution strategies can improve both stability and economy performance of hybrid electric vehicles, which is prominently proved by many studies. To achieve better dynamic stable performance and higher energy recovery efficiency, an effective braking control strategy for hybrid electric buses (HEB) based on vehicle mass and road slope estimation is proposed in this paper. Firstly, the road slope and the vehicle mass are estimated by a hybrid algorithm of extended Kalman filter (EKF) and recursive least square (RLS). Secondly, the total braking torque of HEB is calculated by the sliding mode controller (SMC), which uses the information of brake intensity, whole vehicle mass, and road slope. Finally, comprehensively considering driver's braking intention and regulations of the Economic Commission for Europe (ECE), the optimal proportional relationship between regenerative braking and pneumatic braking is obtained. Furthermore, related simulations and experiments are carried out on the hardware-in-the-loop test bench. Results show that the proposed strategy can effectively improve the braking performance and increase the recovered energy through precise control of the braking torque.

【 授权许可】

CC BY   
© The Author(s) 2022

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