Patent ID: 6338015
Filing Date: 2002-01-08
Classification: B60T,B62D

Abstract:
A system for controlling steering of a vehicle, comprising:steering means having an actuator which steers driven wheels of the vehicle; first steering control means for controlling the actuator; first detecting means comprising a camera that images a road ahead of the vehicle for detecting a lane boundary condition of the road on which the vehicle travels; second detecting means for detecting motion of the vehicle; steering assist torque calculating means for calculating a steering assist torque necessary for holding a positional relationship between the vehicle and the lane condition; torque detecting means for detecting a steering torque manually applied to the steering means by the driver; and second steering control means for calculating a torque command to be output to the first steering control means based on the steering assist torque calculated by the steering assist torque calculating means and the detected steering torque detected by the torque detecting means to control the actuator such that the torque command decreases; wherein: the second steering control means transfers to the first steering control means an index indicative of a condition under which the steering assist torque was calculated, when the second steering control means transfers the steering assist torque to the first steering control means.