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:
Oct. 17, 1989
Filed:
Aug. 26, 1987
Kenichi Watanabe, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A vehicle four wheel steering system including a front wheel steering mechanism for steering the front wheels in response to an operation of a manually operated steering member, a rear wheel steering mechanism for steering rear wheels in response to a steering movement of the front wheel. A control unit is provided for changing the steering ratio of the rear wheel steering angle to the front wheel steering angle in accordance with the vehicle speed. The steering ratio is further modified so that the rear wheel steering angle is added with a modification angle in the direction opposite to the direction of steering of the front wheel, the modification angle being increased in response to an increase in the side force on the vehicle.