PERFORMANCE AND THEORY OF THE HYDRAULIC ACTUATORS FOR AUTOMOTIVE ACTIVE SAFETY

CONTROL SYSTEM

WANG Huiyi  YU Liangyao  SONG Jian

(State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084)

Abstract: The hydraulic actuators applied in the automotive active safety system, including anti-lock braking system, traction control system, electronics stability program, active suspension, 4-wheel steering system, are introduced. The hydraulic actuator used in the most advanced active safety system currently installed in the luxury cars is analyzed. The hydraulic actuator used in the electronics stability program (ESP) is required to have high speed to response the demand in 10 ms. The high responsibility, the parameters of the structure, the parameters of the vehicle system must be considered roundly. The method of modelling and simulating the hydraulic actuators for the automotive anti-lock braking system applied by the authors is introduced. This method can also be applied to other automotive active safety systems. Finally, the expectation of the actuator for the future active safety system is presented.

Key words: Hydraulic actuator of automobile Electronics stability program Modulating valve

CLC No: TH137

国家自然科学基金资助项目(50575120). Received 20060911, received in revised form 20070607