Title: A multi-closed loop pressure control in electro-hydraulic brake system for electric vehicle

Authors: Qiping Chen; Haiyang Tong; Haoyu Sun; Zongyu Lv; Chagen Luo; Chengping Zhong

Addresses: Key Laboratory of Conveyance and Equipment, Ministry of Education, East China Jiaotong University, Nanchang 330013, China ' Key Laboratory of Conveyance and Equipment, Ministry of Education, East China Jiaotong University, Nanchang 330013, China ' Key Laboratory of Conveyance and Equipment, Ministry of Education, East China Jiaotong University, Nanchang 330013, China ' Key Laboratory of Conveyance and Equipment, Ministry of Education, East China Jiaotong University, Nanchang 330013, China ' Nanchang Automotive Institute of Intelligence and New Energy, Tongji University, Nanchang 330052, China ' Jiangling Motors Co., Ltd., Nanchang 330000, China

Abstract: To validate and further improve the performance of pressure-building of an electro-hydraulic brake (EHB) system for electric vehicle, a simplified EHB framework based on permanent magnet synchronous motor (PMSM) is proposed in this paper. Except for the control logic, the hydraulic brake actuator in the proposed EHB system is analysed and modelled in AMESim. Then, the output characteristics of the hydraulic brake actuator model are studied and analysed, which prove the validity of the actuator model established in AMESim. Then, the hydraulic brake actuator based on the PMSM is analysed and modelled in Simulink. Then, according to the models of the hydraulic actuator, a multi-closed loop pressure control strategy is proposed and is applied in the co-simulation based on AMESim and Simulink. The research and simulation results show that the average pressure of the front and rear brake wheel cylinders can reach the target within 0.2 s, and the PMSM output rotate speed tracks the target well. The multi-closed loop pressure control strategy proposed in this paper shows a faster response in pressure-building, which can be regarded as a significant advantage of electro-hydraulic brake system.

Keywords: multi-closed loop; pressure control; electro-hydraulic brake system; electric vehicle.

DOI: 10.1504/IJEHV.2023.134374

International Journal of Electric and Hybrid Vehicles, 2023 Vol.15 No.3, pp.272 - 291

Received: 31 Mar 2022
Accepted: 15 Jun 2022
Published online: 19 Oct 2023 *

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