Electric power steering controller with failure detecting functi

Details Electric power steering controller with failure detecting functi Electric power steering controller with failure detecting functi

1995-08-11

1997-07-29

Martin, David S.

Electricity: motive power systems

Limitation of motor load, current, torque or force

318432, 318489, 180446, H02K 1732

Patent

active

056524870

ABSTRACT:
In a electric power steering controller, an output signal of motor driving direction discrimination means is compared with a driving direction discrimination processing result to detect a failure of the motor driving direction discriminator in accordance with the comparison result, so as to prevent the runaway of a motor supplying steering force to a steering wheel.
The following are included: a motor for supplying a steering force to a steering wheel, a steering torque detector for detecting the steering force from the steering wheel, a motor control for drive-controlling the motor rightward or leftward in accordance with the output of the steering torque detector, a motor driving direction discrimination means for outputting a motor right- or left-direction discriminating signal in accordance with the value of the output of the steering torque discriminator, and a microcomputer 8 for determining the vicinity of a neutral point of steering torque and judging whether the motor driving direction discriminator or has failed in accordance with a judgment result of a signal output from the motor driving direction discriminator when the vicinity of the neutral point is discriminated.

REFERENCES:
patent: 4573545 (1986-03-01), Kalns
patent: 4621327 (1986-11-01), Dolph et al.
patent: 4736810 (1988-04-01), Morishita et al.
patent: 4754830 (1988-07-01), Morishita et al.
patent: 4842087 (1989-06-01), Morishita et al.
patent: 4896735 (1990-01-01), Morishita et al.

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