Patent ID: 6751539
Filing Date: 2004-06-15
Classification: B62D

Abstract:
A vehicle steering control system for use with a steering mechanism of steer-by-wire type, the steering mechanism including a first steering unit that is handed by a driver and a second steering unit that steers steered road wheels with the aid of a steering actuator, the first and second steering units being mechanically unconnected,the vehicle steering control system comprising: a steering reaction force actuator that generates a steering reaction force that is to be applied to the first steering unit in accordance with a steered movement of the steered road wheels; an input detecting section that detects an input applied to the steering actuator; an output detecting section that detects an output issued from the steering actuator; a road surface disturbance estimating section that estimates a disturbance of road surface based on both the detected input and output of the steering actuator; a steering reaction force calculating section that, based on the estimated disturbance of road surface, calculates a steering reaction force which is to be applied to the first steering unit; and a steering reaction force control section that instructs the steering reaction force actuator to generate a steering reaction force in accordance with the calculated steering reaction force.