Patent ID: 7905499

Claim:
A stabilizer system for a vehicle comprising: a stabilizer bar connected to left and right wheels at respective opposite ends thereof; an actuator which has an electric motor and which changes, owing to motor force generated by the electric motor, stiffness of the stabilizer bar with respect to roll of a body of the vehicle according to an operational position of the actuator; a control device including: a motor-force-direction•power-amount determining portion which determines a motor-force generating direction that is a direction of generation of the motor force to be generated by the electric motor and a supply power amount to the electric motor corresponding to a magnitude of the motor force; and an actuator-operation control portion which controls an operation of the actuator on the basis of the motor-force generating direction and the supply power amount; and a target-operational-position determining portion which determines a target operational position of the actuator, wherein the motor-force-direction•power-amount determining portion determines the motor-force generating direction and the supply power amount on the basis of a supply-power-component sum that is a sum of (a): a displacement-amount-dependent supply-power component determined depending upon a displacement amount of the operational position of the actuator with respect to a neutral position; and (b) a deviation-dependent supply-power component based on operational-position deviation which is deviation of the operational position with respect to the target operational position, wherein the actuator-operation control portion controls the operation of the actuator on the basis of the target operational position, and wherein that the motor-force-direction•power-amount determining portion includes a power-amount limit section which limits the supply power amount when the supply-power-component sum becomes a value that is closer to the displacement-amount-dependent supply-power component than a prescribed threshold in a specific situation, in which a direction of generation of the motor force based on the displacement-amount-dependent supply-power component and a direction of generation of the motor force based on the deviation-dependent supply-power component differ from each other.