Patent ID: 7887064
Filing Date: 2011-02-15
Classification: B60G,F16F

Abstract:
1. A suspension system for a vehicle, comprising: a suspension spring disposed between a sprung portion and an unsprung portion; an electromagnetic actuator which is disposed in parallel with the suspension spring and which includes an electric motor, the actuator applying, to the sprung portion and the unsprung portion, an actuator force that is a force in a direction in which the sprung portion and the unsprung portion are moved toward and away from each other, based on a force generated by the electric motor; and a control device which controls the actuator and which is configured to execute simultaneously (a) a vibration damping control in which the actuator force is generated as a vibration damping force for damping at least a sprung vibration and (b) a body-posture control in which the actuator force is applied as a body-posture control force for restraining at least one of roll and pitch of a body of the vehicle, wherein the control device is configured to control the actuator force generated by the actuator, based on a component sum which is a sum of (A) a vibration damping component that is the actuator force to be generated in the vibration damping control and (B) a posture control component that is the actuator force to be generated in the body-posture control, and the control device includes a posture-control-component limiting portion configured to limit the posture control component to a value not larger than a posture-control-component limit value that is a limit value of the posture control component.