Patent ID: 9540035
Date: 2017-01-10
CPC Classifications: B62D

Claim:
1. A control apparatus controlling a motor of an electric power steering system including: an input shaft that is connected to a steering member configured to be turned by a driver; a column shaft that is connected to the input shaft at a position opposite to the steering member; a turning device that includes a rack and pinion mechanism converting a rotational motion of the column shaft into a reciprocating motion, and turns a wheel; and the motor that generates assist torque assisting turning of the steering member, the control apparatus comprising: a reliability computation portion that computes a reliability according to an abnormality detection state for at least one of a steering-shaft load estimation portion that estimates a steering shaft load using a weight changing portion that changes a weighting of a corresponding value from among the current corresponding value, the torque corresponding value and the rotational angle corresponding value, according to the reliability computed by the reliability computation portion, wherein the corresponding value corresponds to one sensor having a detected abnormality from among the current sensor, the torque sensor and the rotational angle sensor.