Front and rear wheel steering system for motor vehicles

Details Front and rear wheel steering system for motor vehicles Front and rear wheel steering system for motor vehicles

1991-12-02

1993-06-15

Hill, Mitchell J.

Motor vehicles

Compensating devices

36442405, B62D 714

Patent

active

052190358

ABSTRACT:
A front and rear wheel steering system for a motor vehicle with steerable front and rear road wheels includes a front wheel steering mechanism for steering the front road wheels in response to a steering action effected by a steering wheel of the motor vehicle, a neutral positioning mechanism for normally urging the rear road wheels under a resilient force to a steering neutral position, a rear wheel steering mechanism having an electric motor for steering the rear road wheels out of the steering neutral position, and a controller for controlling an electric current supplied to the electric motor depending on the steering action of the steering wheel. The controller reduces the electric current supplied to the electric motor and subsequently holds the reduced electric current while the motor vehicle is at rest and no steering action is effected by the steering wheel. Preferably, the controller controls the electric current supplied to the electric motor to reach a value which enables the electric motor to produce an output force smaller than the resilient force produced by the neutral positioning mechanism.

REFERENCES:
patent: 4939653 (1990-07-01), Tsurumiya et al.
patent: 5083627 (1992-01-01), Kawamoto et al.
patent: 5119302 (1992-06-01), Abe et al.

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