Control method for electric power steering apparatus for vehicle

Claim 1

A control system for an electric power steering apparatus for a vehicle, said control system comprising: a torque sensor which is used to detect a steering torque resulting from a steering operation performed by a driver; a target value setting means for setting a predetermined target value relating to a power steering control of said steering apparatus; and a primary delay system setting means including: a first comparator means for comparing said detected steering torque with said predetermined target value, an arithmetic amplifier including an amplifier with a gain (F1), said gain being varied in accordance with the speed of the vehicle, a second comparator means for comparing an output (P0) of said first comparator with an output of said amplifier, an integrating means (26) for integrating an output of said second comparator means and generating said integrated output as an output of said arithmetic amplifier, and a third comparator means (30,28) for comparing said output of said integrating means with signals relating to mechanical and electrical compensation delay of said steering torque to generate a control signal transmitted to a motor means of said control system for preventing oversteering of said vehicle.