Suspension control device

Land vehicles – Wheeled – Running gear

Patent

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Details

36442405, B60G 17015

Patent

active

053758722

ABSTRACT:
In a suspension control device, vertical acceleration detecting means detects an acceleration of a vehicle body in a vertical direction. A spring constant and damping force changing means for the suspensions of the vehicle body is provided. A vertical acceleration differential value measuring means measures the differential value of an output signal of the vertical acceleration detecting means which is larger than a predetermined level. A vertical acceleration period measuring means measures the magnitude and period of vibration of the output signal of the vertical acceleration detecting means. A first damping force and spring constant holding and setting means estimates a frequency of vibration of the vehicle body from the output signal of the vertical acceleration differential value measuring means, operating on the frequency thus estimated. A second damping force and spring constant holding and setting means operates on the frequency of vibration of the vehicle body which is obtained from the output signal of the vertical acceleration period measuring means. A spring constant and damping force changing control unit which, in accordance with the outputs of the first and second damping force and spring constant holding and setting means, changes the outputs of the spring constant and damping force changing means to desired levels simultaneously for the front and rear wheels, and maintains the outputs thus changed for a predetermined period of time.

REFERENCES:
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patent: 5173858 (1992-12-01), Wada et al.
patent: 5175687 (1992-12-01), Tsutsumi et al.
patent: 5189614 (1993-02-01), Mitsuoka et al.

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