Four-wheel steering device for an automobile

Details Four-wheel steering device for an automobile Four-wheel steering device for an automobile

1988-12-02

1990-09-04

Marmor, Charles A.

Motor vehicles

Compensating devices

180140, 180142, B62D 506

Patent

active

049536494

ABSTRACT:
A four-wheel steering device for an automobile includes a main turning arrangement for steering main wheels, a subsidiary turning arrangement for sterring subsidiary wheels, and a control system including a motor having terminals thereon, first and second steering angle sensor arrangements for detecting first and second steering angles of the main the subsidiary wheels, respectively, and a control arrangement. The control arrangement is responsive to a state change of the first and second detected steering angles for determining the operating state of the control system. The control arrangement is operable when the control system operates normally to drive and control the motor and thereby the subsidiary turning means so as to steer the subsidiary wheels depending on the steering angle of the main wheels. The control arrangement is further operable when the control system operates abnormally to cut off the power source to the motor in order to converge the steering angle of the subsidiary wheels gradually to zero and also to short-circuit the terminals of the motor.

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