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EP0186908A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Shock absorber controller

Assignee: Toyota Motor Corp
•
Filing: 1985-12-27
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Granted: —
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Expires: 2005-12-27
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Abstract

Abstract This invention relates to a shock absorber controller for a shock absorber of a rear wheel of a vehicle having a suspension between a vehicle body and the wheel. The controller detects the protrusions or sinkings of a road surface by measuring the distance between the vehicle body and a front wheel. If the detected protrusion or sinking is larger than the predetermined value, the damping force of rear shock absorber is immediately decreased. In the case of protrusion, the damping force of the shortened side of rear shock absorber is decreased, and in the case of sinking the damping force of the stretched side is decreased. Moreover, the alteration means to change the damping force to a plurality of phases in accordance with the condition of the road surface is available in addition to the restoring means. It is effective to install the aforementioned equipment in the left and right sides of a vehicle body respectively, having a suspension between a vehicle body and the rear wheel. The controller detects the distance between the vehicle body and a front wheel, and judges if the front wheel is rising or sinking to decrease the damping force of shock absorber of rear wheel to stretching side or shrinking side in accordance with the degree of the rising and sinking of the front wheel.

Inventors

  • 👤 Ken Asami
  • 👤 Kaoru Ohashi
  • 👤 Toshio Onuma
  • 👤 Shuuichi Buma

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 16:11
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/44; F16F9/46; F16F9/466; F16F9/467; F16F9/468; B; B60; B60G; B60G17/00; B60G17/015; B60G17/0152; B60G17/016; B60G17/0165

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 176 words
A shock absorber controller for a shock absorber of a rear suspension of a vehicle having a suspension between a vehicle body and a rear;wheel, comprising: front vehicle height detection means for generating a height signal indicating the distance between the vehicle body and a front wheel; rising judgment means for generating a rising signal indicating the vehicle is getting over a protrusion of larger scale which exceeds a predetermined range, on the basis of said front vehicle height signal; sinking judgment means for generating a sinking signal indicating the vehicle is failing in a sinking of larger scale which exceeds another predetermined range, on the basis of said front vehicle height signal; damping force alteration means for altering a damping force of the stretching side and the shortening side of the rear shock absorber; and control means for controlling said damping force alteration means to decrease said damping force of the shortening side in accordance with said rising signal and to decrease said damping force of the stretching side in accordance with said sinking signal.
Claim 2
Dependent Claim 176 words
A shock absorber controller for a shock absorber of a rear suspension of a vehicle having a suspension between a vehicle body and a rear;wheel, comprising: front vehicle height detection means for generating a height signal indicating the distance between the vehicle body and a front wheel; rising judgment means for generating a rising signal indicating the vehicle is getting over a protrusion of larger scale which exceeds a predetermined range, on the basis of said front vehicle height signal; sinking judgment means for generating a sinking signal indicating the vehicle is failing in a sinking of larger scale which exceeds another predetermined range, on the basis of said front vehicle height signal; damping force alteration means for altering a damping force of the stretching side and the shortening side of the rear shock absorber; and control means for controlling said damping force alteration means to decrease said damping force of the shortening side in accordance with said rising signal and to decrease said damping force of the stretching side in accordance with said sinking signal.
Claim 3
Dependent Claim 71 words
A shock absorber controller as claimed in claim 1 wherein the sock absorber controller further comprises; restoring means for changing the damping force of the shortening side to the original condition after a predetermined time interval has elapsed since said rising signal is generated, and for changing the damping force of the stretching side to the original condition after another predetermined time interval has elapsed since said sinking signal is generated.
Claim 4
Dependent Claim 49 words
A shock absorber controller as claimed in claim 1, wherein the shock absorber controller comprises the front vehicle height detection means, the rising judgment means, the sinking judgment means, and the damping force alteration means for each of the right side and the left side of the vehicle body.
Claim 5
Dependent Claim 76 words
A shock absorber controller as claimed in claim 1, wherein said rising judgment means and said sinking judgment means generate a plurality of the rising and the sinking signals respectively in accordance with the said front vehicle height signal, and said control means decrease the damping force of the shortening side and the stretching side of the rear shock absorber to a plurality of phases in accordance with said plurality of the rising and sinking signals.

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