Hydraulic regenerative braking system in electrical vehicle

ZHOU Ling-xiao， NING Xiao-bin， XIE Wei-dong
（Institute of Vehicle Engineering， Zhejiang University of Technology， Hangzhou 310014， China）

Abstract： Aiming at solving the problems of the short drive range and improve efficiency of recovering braking energy in electrical vehicle，a constant pressure hydraulic regenerative braking system with flywheel was established after comparing several hydraulic regenerative braking schemes. An experiment was undertaken by using the displacement of pump/motor as variables. The correlation between displacement of pump/motor and efficiency of energy recovering was explored. After that braking and ECE-15 driving condition simulation based on AMEsim was investigated，correlation between displacement of pump/motor and efficiency of energy recovering was evaluated. The results indicate that driving range of electrical has been increased by 25% and the service life of batteries is prolonged because depth of discharge is decreased.
Key words： electrical vehicle； regenerative braking system； experiment； AMEsim