| 摘要 |
PURPOSE:To make it possible to realize a desired spring motion, by successively obtaining control amounts for changing the damping force of a shock absorber from a preset pattern of displacement of the spring section of a suspension unit after the suspended section reaches its most extended and retracted positions. CONSTITUTION:The damping force may be changed by a inflow control valve 10 for controlling the amount of oil 8 flowing into a spherical gas chamber 5 in a hydraulic suspension unit 1 composed of a cylinder section 6 and disposed between a vehicle body 2 and an suspension arm 4 which follows up the vertical motion of a vehicle wheel 3. An electronic control circuit 30 control the inflow control valve 10 in accordance with output signals from an acceleration sensor 20 for detecting the vertical acceleration of the vehicle body 2 and a suspended part relative sped and displacement sensor 21. That is, a pattern of displacement of the suspended section with which the suspended section is returned to its most extended or retracted position to its neutral position, is set, and a required flow rate is obtained from the above-mentioned pattern in order to control the opening degree of the control valve f10 after the suspended section reaches its most extended position.
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