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:
Jun. 20, 2006
Filed:
Nov. 20, 2002
Kazuo Hara, Kanagawa, JP;
Kazuo Hara, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
In a variable ratio steering system of a vehicle with a variable steering ratio mechanism varying a steering ratio R of steering wheel angle θto road wheel steer angle θat steered road wheels, a vehicle speed sensor, and a steering angle sensor, a steering ratio control unit controls the steering ratio according to a fixed steering ratio characteristic when the steering wheel angle θis less than or equal to a predetermined angle θsubstantially corresponding to a neutral position of a steering wheel. Conversely when the steering wheel angle θis greater than the predetermined angle θsubstantially corresponding to the neutral position of the steering wheel, the steering ratio control unit controls the steering ratio according to a vehicle-speed dependent steering ratio characteristic that a steering angle versus road wheel steer angle characteristic varies depending on a vehicle speed value.