Abstract
KEYWORDS - hybrid brake control, Integrated-Electro-Hydraulic Brake System, gear shifting dynamic conditions, braking force distribution, motor torque control
ABSTRACT -
The control under dynamic conditions when hydraulic brake and regenerate break switch mutually is the key technical issue about electric vehicle hybrid brake system. In this study a coordination control system under dynamic conditions has been proposed, including brake force distribution strategy and motor torque control algorithm. According to different braking intensity, the brake force distribution module is divided into emergency braking strategy and conventional braking strategy. Motor torque control algorithm has fixed the distribution results under gear-shifting dynamic condition, which has fast and accurate response, thus the response of whole hybrid system has been improved. A novel design of I-EHB with failure-safe, accurate pressure control and a novel 4-valve ESC system control are presented. A HIL test with Carsim/Simulink was built to verify the proposed hybrid brake control algorithm.