Variable damping characteristics shock absorber

Details Variable damping characteristics shock absorber Variable damping characteristics shock absorber

1989-11-22

1991-10-08

Bertsch, Richard A.

Land vehicles

Wheeled

Running gear

188299, 280709, B60G 1700, B60G 1708, F16F 950

Patent

active

050548093

ABSTRACT:
A variable damping characteristics shock absorber includes a piezoelectric unit which serves as a sensor for detecting piston stroke and an actuator for adjusting stiffness of a flow restriction valve and thus for adjusting the damping characteristics of the shock absorber. The shock absorber includes a pair of flow restriction valves, in which one of valve is active in response to a piston bounding stroke for generating damping force by restricting the fluid flow and the other is active in response to a piston rebounding stroke for generating a damping force by restricting fluid flow. The piezoelectric unit is disposed between two valves in such a manner that it may monitor piston strokes both in the bounding and rebounding stroke directions and adjust stiffness of both of the flow restriction valves.

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