A New Type of Automotive Braking Actuator for Decentralized Electro-hydraulic Braking System  

作　　者：Liang-Xu Ma Liang-Yao Yu Zhi-Zhong Wang Jian Song 

机构地区：[1]State Key Laboratory of Automotive Safety and Energy,Tsinghua University

出　　处：《Journal of Harbin Institute of Technology(New Series)》2014年第1期1-6,共6页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National High Technology R&D Program of China(Grant No.2012AA111204 and 2012AA110903);National Key Basic Research Program of China(Grant No.2011CB711205);Free Research Project of State Key Laboratory of Automotive Safety and Energy(Grant No.zz2011-052)

摘　　要：This paper presents a new type of automotive braking actuator for a kind of brake-by-wire system called decentralized electro-hydraulic braking system( DEHB) to replace the traditional automobile braking system. The actuator of this system is driven by an electrical motor instead of the conventional vacuum booster to make the brake pressure be linearity controlled quickly. Therefore,the system has the advantages of quick response speed,good control performance and simple structure. Firstly,an overview of the actuator and the whole DEHB system is shown. Secondly,the possibility of this new kind of actuator working for the system is ensured based on some braking theories. Thirdly,the appropriate dynamic simulations are done to get some results to show the relations of different parameters and the effect of braking. Eventually,the proper parameters are determined to build a test bench which shows that DEHB system can achieve the maximum pressure of 13 MPa within 100 ms after parametric optimization,and meanwhile,the actuator is able to reduce pressure quickly after maintaining high pressure. All of the bench test results can meet with the design requirements and real demand of vehicle and this actuator may improve vehicle braking effect in the future. Besides,this actuator can be widely applied to the regenerative braking system because of its linear braking performance.This paper presents a new type of automotive braking actuator for a kind of brake-by-wire system called decentralized electro-hydraulic braking system （DEHB） to replace the traditional automobile braking system. The actuator of this system is driven by an electrical motor instead of the conventional vacuum booster to make the brake pressure be linearity controlled quickly. Therefore, the system has the advantages of quick response speed, good control performance and simple structure. Firstly, an overview of the actuator and the whole DEHB system is shown. Secondly, the possibility of this new kind of actuator working for the system is ensured based on some braking theories. Thirdly, the appropriate dynamic simulations are done to get some results to show the relations of different parameters and the effect of braking. Eventually, the proper parameters are determined to build a test bench which shows that DEHB system can achieve the maximum pressure of 13 MPa within 100 ms after parametric optimization, and meanwhile, the actuator is able to reduce pressure quickly after maintaining high pressure. All of the bench test results can meet with the design requirements and real demand of vehicle and this actuator may improve vehicle braking effect in the future. Besides, this actuator can be widely applied to the regenerative braking system because of its linear braking performance.

关 键 词：vehicle BRAKE-BY-WIRE DECENTRALIZED ELECTRO-HYDRAULIC BRAKING system BRAKING ACTUATOR 

分 类 号：U463.5[机械工程—车辆工程]