Patent ID: 7543823

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 elastic force to be exhibited by the stabilizer bar, as a result of control of an operation of the electric motor; and a control device which controls the operation of the electric motor; wherein the control device includes an operation-mode changing portion which changes an operation mode of the electric motor that depends on a motor-phase-connecting formation and a power-supply status of the electric motor, on the basis of at least one of a vehicle running state and a road surface condition; wherein the operation-mode changing portion includes a vehicle-speed-dependent determining portion which determines the operation mode of the electric motor to be changed, on the basis of a running speed of the vehicle as the vehicle running state, and wherein the vehicle-speed-dependent determining portion determines the operation mode of the electric motor to be a free mode, wherein the motor-phase-connecting formation is a formation in which electric power is inhibited from being supplied to phases of the electric motor, when the running speed of the vehicle is smaller than a predetermined threshold speed.