Patent ID: 7322438

Claim:
An electrically driven power steering control apparatus for a vehicle that gives a steering assist torque to a steering mechanism including an electrically driven motor by supplying electric power to the electrically driven motor based on a speed of the vehicle and a steering operation of said driver, the apparatus comprising: tiredness detecting means for detecting tiredness of said driver; driving control means for restricting an operation of said electrically driven motor based on said tiredness detected by said tiredness detecting means; motor current calculating means for calculating a fundamental motor current to be supplied to said electrically driven motor based on said vehicle speed and a steering force of a driver's steering operation; motor current gain calculating means for calculating a gain of said fundamental motor current based on said tiredness; and corrected motor current calculating means for calculating a corrected motor current based on said calculated fundamental motor current and said calculated gain, wherein said gain calculated by said motor current gain calculating means is adapted to decrease with increasing tiredness of the driver so as to suppress said corrected motor current, thereby restricting the operation of said electrically driven motor.