| 摘要 |
An electric power steering apparatus has a torque sensor which, if the torsion of a torsion bar is within a predetermined angle, linearly outputs a detection signal converted by a first conversion ratio with respect to the torsion, and if the torsion has exceeded the predetermined angle and is within a limit angle, the torsion sensor outputs a detection signal converted by a second conversion ratio which is lower than the first conversion ratio. Further, if the detection signal has exceeded an upper threshold or dropped below a lower threshold, which thresholds being set outside the range of the detection signal outputted from the torsion sensor in its normal state in which the torsion of the torsion bar is within the limit angle, a determination is made that an abnormality has occurred in the torsion sensor.
|
