Control system for adjustable damping force

A control system for an adjustable damping force, comprising:

• a damper provided on a suspension apparatus of a vehicle;
• a damper speed sensor detecting speed of the damper;
• a moving condition sensor detecting moving condition of the vehicle;
• and
• a control unit determining target damping force in accordance with the moving condition, determining control parameter based the damper speed 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.