Four-wheel steering system for motor vehicle

Details Four-wheel steering system for motor vehicle Four-wheel steering system for motor vehicle

1988-04-29

1990-09-04

Mitchell, David M.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

280 91, B62D 504

Patent

active

049536524

ABSTRACT:
A four-wheel steering system for motor vehicle including a front wheel steering mechanism for steering front wheels in response to a steering wheel, a rear wheel steering mechanism in accordance with the movement of the front wheels, control unit having driving condition detecting means for detecting a vehicle driving condition and controlling the rear wheel steering mechanism, fail judging section for judging a failure of the control unit and producing a failure signal, and fail-safe control unit for controlling the rear wheel steering mechanism in a manner different from a control under a normal operation of the control unit when the control unit is in an unusual condition, and the fail judging section and/or the fail-safe control unit being provided with a plurality of actuating mechanism wherein each of the actuating mechanism can actuate the fail judging section and the fail-safe control unit independently to position the rear wheels at a neutral position.

REFERENCES:
patent: 4572316 (1986-02-01), Kanazawa et al.
patent: 4740002 (1988-04-01), Miyoshi
patent: 4782907 (1988-11-01), Morishita et al.

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