Patent ID: 6505704
Filing Date: 2003-01-14
Classification: B60T,B62D

Abstract:
An electric power steering system, comprising:a torque detection unit for sensing a manual steering torque applied to a steering wheel of a vehicle and detecting a braking power difference torque representing a difference in braking powers between left and right driving wheels of the vehicle; an anti-lock brake system (ABS) electronic control unit for outputting an ABS operational signal which provides information on a sharp braking of the vehicle; an electric power steering control unit for generating a motor current in response to the manual steering torque provided from the torque detection unit and, if the ABS operational signal is provided, outputting a modulated motor current obtained by increasing or decreasing the motor current based on the braking power difference torque; and an electric power steering motor, which operates based on the modulated motor current provided from the electric power steering control unit, for reducing unnecessary movements of the steering wheel caused by a difference in road surface frictional forces of left and right driving wheels of the vehicle.