Actively controlled suspension system for automotive vehicles with vehicular speed dependent variable damping characteristics

摘要

A suspension control system introduces capability of automatically adjusting sensibility of attitude change depending upon a vehicular speed with maintaining capability of manual adjustment of the sensibility for the vehicular attitude change. The actively controlled suspension system employs a pressure control valve (1 which is operable in response to a control signal and controls fluid pressure in the fluid chamber of a hydraulic cylinder (11) as a replacement of the conventional hydraulic shock absorber. The pressure control valve is associated with a controller (30) which detects bounding and rebounding acceleration and stroke speed in bounding and rebounding motion for detecting vehicular attitude change and deriving a control signal to operate the pressure control valve to suppress attitude change. The controller is response to a vehicle speed indicative parameter for adjusting sensitivity of attitude change and whereby adjusting suspension control characteristics.