Patent ID: 7617032

Claim:
A control system for an adjustable damping force, comprising: a damper provided on a suspension apparatus of a vehicle; a damper displacement sensor detecting displacement of the damper; a moving condition sensor detecting moving condition of the vehicle, wherein the moving condition is at least a lateral acceleration; and a control unit determining target damping force in accordance with the moving condition, determining control parameter based on a damper speed calculated on the basis of the damper displacement and the target damping force by using a map, and outputting the control parameter so as to adjust damping force of the damper, wherein the map is set so as to satisfy following conditions to thereby perform stable control of the damping force when the damper speed is not more than a predetermined value: when the damper speed is constant value and is not more than the predetermined value, the control parameter is increased with gradient A as the target damping force is increased; when the damper speed is constant value and is more than the predetermined value, the control parameter is increased with gradient B as the target damping force is increased, wherein the gradient A is larger than the gradient B; and when the target damping force is constant, the control parameter is decreased as the damper speed is increased.