Method and device for rear-wheel steering of automotive vehicle

Details Method and device for rear-wheel steering of automotive vehicle Method and device for rear-wheel steering of automotive vehicle

1989-02-09

1991-05-14

Bertsch, Richard A.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

36442405, 280 91, B62D 714

Patent

active

050148010

ABSTRACT:
In an automotive four-wheel steering system having a control unit for operating in response to various sensors associated with the front-wheel and rear-wheel steering systems to control the steering of the rear wheels. The control unit includes a first sensor for detecting front-wheel steering force or front-wheel assist (power) steering force, or cornering force occurring in the front wheels, a second sensor for detecting front-wheel steering speed, and a sensor abnormality determination device for operating, when a difference occurs between the values detected by the first sensor and the direction of the front-wheel steering speed detected by the second sensor, to indicate that an abnormality has occurred in either of the first or second sensors. Thus fail-safe operation is assured.

REFERENCES:
patent: 4660671 (1987-09-01), Behr et al.
patent: 4779693 (1988-10-01), Takahashi et al.
patent: 4782907 (1988-11-01), Morishita
patent: 4869335 (1989-09-01), Takahashi

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