A new braking force distribution strategy for electric vehicle based on regenerative braking strength continuity
来源期刊：中南大学学报(英文版)2013年第12期
论文作者：LIAN Yu-feng(廉宇峰) TIAN Yan-tao(田彦涛) HU Lei-lei(胡蕾蕾) YIN Cheng(尹诚)
文章页码：3481 - 3489
Key words：braking force distribution; regenerative braking; electric vehicle; four-wheel drive; regenerative braking strength continuity
Abstract: Regenerative braking was the process of converting the kinetic energy and potential energy, which were stored in the vehicle body when vehicle braked or went downhill, into electrical energy and storing it into battery. The problem on how to distribute braking forces of front wheel and rear wheel for electric vehicles with four-wheel drive was more complex than that for electric vehicles with front-wheel drive or rear-wheel drive. In this work, the frictional braking forces distribution curve of front wheel and rear wheel is determined by optimizing the braking force distribution curve of hydraulic proportional-adjustable valve, and then the safety brake range is obtained correspondingly. A new braking force distribution strategy based on regenerative braking strength continuity is proposed to solve the braking force distribution problem for electric vehicles with four-wheel drive. Highway fuel economy test (HWFET) driving condition is used to provide the speed signals, the braking force equations of front wheel and rear wheel are expressed with linear equations. The feasibility, effectiveness, and practicality of the new braking force distribution strategy based on regenerative braking strength continuity are verified by regenerative braking strength simulation curve and braking force distribution simulation curves of front wheel and rear wheel. The proposed strategy is simple in structure, easy to be implemented and worthy being spread.
LIAN Yu-feng(廉宇峰)1, 2, TIAN Yan-tao(田彦涛)1, 3, HU Lei-lei(胡蕾蕾)1, YIN Cheng(尹诚)4
(1. College of Communication Engineering, Jilin University, Changchun 130025, China;
2. School of Electrical and Electronic Engineering, Changchun University of Technology, Changchun 130012, China;
3. Key Laboratory of Bionics Engineering of Ministry of Education(Jilin University), Changchun 130025, China;
4. Qiming Information Technology Co., Ltd, Changchun 130122, China)
Abstract:Regenerative braking was the process of converting the kinetic energy and potential energy, which were stored in the vehicle body when vehicle braked or went downhill, into electrical energy and storing it into battery. The problem on how to distribute braking forces of front wheel and rear wheel for electric vehicles with four-wheel drive was more complex than that for electric vehicles with front-wheel drive or rear-wheel drive. In this work, the frictional braking forces distribution curve of front wheel and rear wheel is determined by optimizing the braking force distribution curve of hydraulic proportional-adjustable valve, and then the safety brake range is obtained correspondingly. A new braking force distribution strategy based on regenerative braking strength continuity is proposed to solve the braking force distribution problem for electric vehicles with four-wheel drive. Highway fuel economy test (HWFET) driving condition is used to provide the speed signals, the braking force equations of front wheel and rear wheel are expressed with linear equations. The feasibility, effectiveness, and practicality of the new braking force distribution strategy based on regenerative braking strength continuity are verified by regenerative braking strength simulation curve and braking force distribution simulation curves of front wheel and rear wheel. The proposed strategy is simple in structure, easy to be implemented and worthy being spread.
Key words:braking force distribution; regenerative braking; electric vehicle; four-wheel drive; regenerative braking strength continuity
