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:
Nov. 14, 1995
Filed:
Feb. 05, 1993
Mizuho Sugiyama, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An electric control apparatus for a four-wheel steering system of an automotive vehicle having a front wheel steering mechanism for a set of dirigible front road wheels and a rear wheel steering mechanism for a set of dirigible rear road wheels, which includes a yaw rate sensor arranged to detect an actual yaw rate of the vehicle for producing a detection signal indicative of the actual yaw rate, and a microcomputer programmed to determine a target steering angle of the rear road wheels in proportion to a high-frequency component of the actual yaw rate for producing a control signal indicative of the target steering angle and to apply the control signal to an electrically operated actuator of the rear wheel steering mechanism so that the rear road wheels are steered at the target steering angle.