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:
Mar. 04, 1997
Filed:
May. 19, 1995
Eric E Braun, Neenah, WI (US);
Duane R Pillar, Oshkosh, WI (US);
Curtis Halgrimson, Valley City, ND (US);
Other;
Abstract
A full-time all wheel steering system is provided whereby the rear wheel angle is determined by the front wheel angle and a relational curve, polynomial equation or set of tabulated values. The front wheel angle is measured and the desired rear wheel angle is calculated by a programmable controller. If the desired rear wheel angle is not sufficiently close to the actual rear wheel angle, the controller means sends a signal which results in adjustment of the rear wheel angle. The desired rear wheel angle may be a function of the vehicle speed as well as the front wheel angle. A dead band may be employed which maintains the rear wheels in a straight ahead position when the front wheel angle does not exceed the dead band value. The maximum rear wheel cramp angle may also be controlled as a function of vehicle speed. The system is applicable to passenger cars, trucks and tractor-trailer rigs.