Fail safe device for rear-wheel steering system

Details Fail safe device for rear-wheel steering system Fail safe device for rear-wheel steering system

1996-07-08

1998-09-22

Hurley, Kevin

Motor vehicles

Steering gear

Power assist alarms or disablers

180445, B62D 530

Patent

active

058101080

ABSTRACT:
A fail safe device for a rear-wheel steering system prevents an abrupt return of a rear-wheel into a neutral position when the rear-wheel steering system malfunctions during vehicle operation to prevent an overshoot. A rear-wheel is steered by a DC motor according to a vehicle speed. A malfunction sensor senses rear-wheel steering system malfunction. A controller controls a back-electromotive force to be applied to the DC motor. The back-electromotive force is generated by revolution of the DC motor based on a signal which is sensed by the malfunction sensor when the rear-wheel is returned to a neutral position. Switching means applies the back-electromotive force to terminals which are positioned around the DC motor.

REFERENCES:
patent: 5027276 (1991-06-01), Morishita et al.
patent: 5448480 (1995-09-01), Rauner et al.
patent: 5552684 (1996-09-01), Wada et al.

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