Patent ID: 6658333
Filing Date: 2003-12-02
Classification: B62D

Abstract:
A control apparatus of a power steering device for controlling a motor on the basis of a current control value calculated from a steering assist command value calculated by calculating means on the basis of a steering torque generated on a steering shaft, and a current value of a motor for applying a steering assist force to a steering mechanism,wherein a difference of a main torque signal and a sub torque signal of a torque sensor for detecting the steering torque is stored preliminarily, and the difference of the main torque signal and the sub torque signal during an operation is compared with the stored value, and at least the current control value is limited when the difference based on the comparison is a state larger than a first prescribed value and continues for a time longer than a first prescribed time, wherein an output of the current control value is stopped when the difference based on the comparison is larger than a second prescribed value which is larger than the first prescribed value and further the state continues for a time longer than a second prescribed time which is shorter than the first prescribed time.