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:
Jan. 22, 2002
Filed:
Aug. 31, 2000
Mitsuru Enomoto, Tokyo, JP;
Ryoe Watanabe, Tokyo, JP;
Hino Motors, Ltd., Tokyo, JP;
Abstract
There is provided a rear front wheel steering control system for a rear two-axle vehicle, which can steer rear front wheels by means of relatively small sized rear front wheel steering device, and thereby can start a vehicle smoothly. Front wheel steering device and rear front wheel steering device are driven by an engine. A controller controls the engine, and also controls the rear front wheel steering device so as to steer rear front wheels in the same direction as that of front wheels based on the detection outputs of the front steering angle sensor of the front wheel and the vehicle speed sensor. When the vehicle speed sensor detects a vehicle speed lower than a first reference value, and a difference in steering angle between a target steering angle based on the steering angle of the front wheel and an actually-measured steering angle of the rear front wheel is larger than a second reference value, the controller increases the rotational speed of the engine to a third reference value. Also, when the difference in steering angle becomes smaller than the second reference value or when a predetermined time has elapsed, the controller returns the rotational speed of the engine to the original value.