Active suspension system and pressure control valve therefor

Details Active suspension system and pressure control valve therefor Active suspension system and pressure control valve therefor

1990-03-27

1991-09-17

Bertsch, Richard A.

Land vehicles

Wheeled

Running gear

280840, 280709, 188299, B60G 1708

Patent

active

050488619

ABSTRACT:
A pressure control valve unit to be employed in an active suspension system includes a valve member movable between a pressure increasing mode position, a pressure decreasing mode position and a pressure holding mode position for adjusting fluid pressure in a working chamber of an active cylinder disposed between a vehicular body and a suspension member rotatably supporting a road wheel. The valve member is further movable to a pressure relieving position in response to a pressure in the working chamber higher than a predetermined value. The valve member at the pressure relieving position establishes fluid communication between the working chamber and a drain line for draining pressurized fluid in the working chamber at a draining rate higher than that in said pressure decreasing mode position.

REFERENCES:
patent: 4702490 (1987-10-01), Yamaguchi et al.
patent: 4801115 (1989-01-01), Heard
patent: 4801155 (1989-01-01), Fukushima et al.
patent: 4848790 (1989-07-01), Fukunaga et al.
patent: 4865348 (1989-09-01), Hano et al.
patent: 4903983 (1990-02-01), Fukushima et al.

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