Semi-active suspension control system with reduced switching fre

Land vehicles – Wheeled – Running gear

Patent

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Details

Other Related Categories

280709, 280714, B60G 17015

Type

Patent

Status

active

Patent number

050887602

Description

ABSTRACT:
A suspension control system is designed to adjust suspension characteristics between hard and soft for bounding and rebounding stroke independently of each other. The system has a sensor means for monitoring speed of a vehicular body as a sprung mass for producing a vehicle body speed indicative signal, which vehicle body speed indicative signal has a variable signal polarity depending upon the direction of vibration, and a sensor means for monitoring relative speed between the vehicular body and a vehicular wheel as an unsprung mass for producing a relative speed indicative signal which also has a variable signal polarity depending upon the direction of relative movement of the vehicular body and the vehicular wheel. A control unit detects a combination of signal polarities of the vehicle body speed indicative signal and the relative speed indicative signal for adjusting damping characteristics for bounding and rebounding vibration independently of each other and depending on the detected combination.

REFERENCES:
patent: 4615420 (1986-10-01), Mourray
patent: 4726453 (1988-02-01), Obstfelder et al.
patent: 4867476 (1989-09-01), Yamanaka et al.
patent: 4909534 (1990-03-01), Fukushima et al.
patent: 4961483 (1990-10-01), Yamaoka et al.
Lizell, M., "Semi-Active Damping", IMechE, 1988, pp. 83-91.

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