The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 1990
Filed:
Apr. 29, 1988
Hiroshi Ohmura, Higashihiroshima, JP;
Takashi Nakashima, Hiroshima, JP;
Takeshi Murai, Hatsukaichi, JP;
Mazda Motor Corporation, Hiroshima, JP;
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.