Patent ID: 6176494
Filing Date: 2001-01-23
Classification: B60G

Abstract:
A suspension control system, comprising:a shock absorber to be interposed between a body of a vehicle and an axle, wherein the shock absorber is capable of generating a damping force;a road surface condition detecting system to generate a signal corresponding to road surface conditions;an extraction device to extract from the signal that is generated by the road surface condition detecting system, a high-frequency vibration component corresponding to a first road surface condition, and a low-frequency vibration corresponding to a second road surface condition; anda control system to send a signal to the shock absorber to generate the damping force in response to each of said high-frequency and low-frequency vibration components when a respective level of said high-frequency and low-frequency vibration components exceeds a predetermined respective value, wherein(i) when vehicle speed is below a certain level, and the respective level of each of said high-frequency and low-frequency vibration components simultaneously exceeds its predetermined respective value, the control system is to send a signal to the shock absorber to generate the damping force in response to the high-frequency vibration component; and(ii) when the vehicle speed is at or above the certain level, and the respective level of each of said high-frequency and low-frequency vibration components simultaneously exceeds its predetermined respective value, the control system is to send a signal to the shock absorber to generate the damping force in response to the low-frequency vibration component.