ELECTRIC POWER STEERING APPARATUS

摘要

In an electric power steering apparatus (1), steering torque (T) of a steering wheel (2) is detected by a torque sensor (22) and a motor (10) for generating steering assist power is controlled so that the steering assist power is generated according to a basic assist torque corresponding to the detected steering torque (T). A correspondence relationship between the detected steering torque (T) and the basic assist torque is set such that an assist gradient that is a rate of change of the basic assist torque to the steering torque (T) varies according to variation of the steering torque (T). A correction amount of a basic assist current is varied according to the variation of the assist gradient.