Shock absorber having controlled damping force characteristics f

Details Shock absorber having controlled damping force characteristics f Shock absorber having controlled damping force characteristics f

1994-01-12

1995-03-21

Chin, Gary

Boots, shoes, and leggings

280707, B60G 1706

Patent

active

054002451

ABSTRACT:
A suspension system of a vehicle for calculating a product of the absolute speed zs of the sprung member and the relative speed zs-zu between the sprung member and the unsprung member and for controlling the damping force characteristic of the shock absorber to be higher if that product is more than the predetermined value and to be lower if the product is less than that value. An insensible range is formed for restricting switching of the damping force characteristic when .vertline.zs.vertline. and .vertline.zs-zu.vertline. are less than the predetermined value .delta.z, .delta.r, so that the damping force characteristic of the shock absorber is kept lower if .vertline.zs.vertline.>.delta.z and .vertline.zs-zu.vertline. or .vertline.zs-zu.vertline.<.delta.r and it is kept higher if .vertline.zs.vertline.>.delta.z and .vertline.zs-zu.vertline. or .vertline.zs-zu.vertline.<.delta.r. Through the above structure, unnecessary switching of the damping force characteristic of the shock absorber can be prevented without lowering the riding comfort and running stability. Also, a sensor for detecting oscillation frequency is not required, resulting in lesser cost.

REFERENCES:
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patent: 4936425 (1990-06-01), Boone et al.
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patent: 4949989 (1990-08-01), Kakizaki et al.
patent: 5056811 (1991-10-01), Fukunaga et al.
patent: 5060919 (1991-10-01), Takano et al.

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