Patent ID: 6719088
Filing Date: 2004-04-13
Classification: B62D

Abstract:
A vehicle steering apparatus comprising:an operating member; an operating actuator for generating torque which acts upon the operating member; a steering actuator; a steering gear for transmitting movement of the steering actuator to vehicle wheels so that variation in steering angle is generated; a sensor for detecting amount of operation of the operating member; a sensor for detecting amount of steering of the vehicle wheels; means for controlling the steering actuator such that the ratio between the amount of operation of the operating member and the amount of steering of the vehicle wheels is varied; means for determining behavior index value for operating corresponding to change in behavior of the vehicle caused by change in steering angle; means for storing a relationship between the amount of operation of the operating member and target behavior index value for operating; means for calculating the target behavior index value for operating from the stored relationship and the detected amount of operation; means for storing a relationship between the behavior index value for operating, the target behavior index value for operating, and target operating torque; means for calculating the target operating torque from the stored relationship, the determined behavior index value for operating, and the determined target behavior index value for operating; and means for controlling the operating actuator such that operating torque of the operating member corresponds to the target operating torque.