Patent ID: 8855859
Filing Date: 2014-10-07
Classification: B62D

Abstract:
1. A vehicle steering system, comprising: a steered wheel driving mechanism that is configured to steer a tire of a vehicle; a steering angle detecting unit that is configured to detect a steering angle of a steering member; a reaction force actuator that is configured to apply a steering reaction force to the steering member; an assist actuator that is configured to drive the steered wheel driving mechanism; a yaw angle detecting unit that is configured to detect a yaw angle of a vehicle body; and a reaction force actuator control unit that is configured to set the steering reaction force as a function of the steering angle detected by the steering angle detecting unit, and that is configured to control the reaction force actuator such that the reaction force actuator generates the set steering reaction force, wherein: the reaction force actuator control unit computes a turning amount of the vehicle body based on a change in the yaw angle of the vehicle body, which is detected by the yaw angle detecting unit, when the computed turning amount is larger than or equal to a reference angle, the reaction force actuator control unit causes the reaction force actuator to increase the steering reaction force that is applied to the steering member, the reaction force actuator control unit causes the reaction force actuator to reduce the increased steering reaction force with a lapse of time from when it is determined that the yaw angle exceeds a reference value, and the reaction force actuator control unit causes the reaction force actuator to stop the increase in the steering reaction force when the vehicle is directed in a straight direction.