Suspension control apparatus

A suspension control apparatus, comprising:

• a vehicle behavior detection unit configured to detect a behavior of a vehicle;
• a damping force adjustable shock absorber provided between two members of the vehicle, the two members being configured to move relative to each other;
• and
• a controller configured to execute control so that a damping force of the damping force adjustable shock absorber is adjusted based on a detection result obtained by the vehicle behavior detection unit,
• wherein the damping force adjustable shock absorber includes:
• a cylinder which sealingly contains functional fluid having a fluid property to be changed by an electric field or a magnetic field;
• a piston which is inserted into the cylinder to be slidable;
• a piston rod which is coupled to the piston, and extends to an outside of the cylinder;
• and
• an electrode which is provided in a portion at which a flow of the functional fluid is generated by the slide of the piston in the cylinder, and is configured to apply the electric field or the magnetic field to the functional fluid, and
• wherein the controller includes:
• a target voltage value setting unit configured to obtain a target voltage value to be applied to the electrode based on the detection result obtained by the vehicle behavior detection unit;
• a temperature estimation unit configured to detect or estimate temperature of the functional fluid;
• and
• a target voltage value correction unit configured to change the target voltage value so that a piston speed is adjusted based on a value obtained by the temperature estimation unit and
• wherein, when the temperature of the functional fluid is lower than a predetermined value, the target voltage value is corrected to be decreased so that the piston speed is increased.