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:
Feb. 22, 2011
Filed:
Jul. 14, 2008
William J. Tate, Dunlap, IL (US);
Jill Trumper, Sullivan, IL (US);
William J. Tate, Dunlap, IL (US);
Jill Trumper, Sullivan, IL (US);
Caterpillar Inc, Peoria, IL (US);
Abstract
A traction control system () for a machine () includes a driven wheel () operated by a motor that is controlled by an electronic controller (). A speed sensor () measures the speed of the driven wheel (), and communicates a wheel () speed to the electronic controller (). A travel speed sensor () measures the travel speed of the machine () and communicates it to the electronic controller (). A steering sensor () measures a displacement of the machine ()'s steering system (), and communicates a steering angle to the electronic controller (). The electronic controller () calculates a speed ratio, based on the wheel () speed and the travel speed, and an expected slip ratio, based on the steering angle. The speed ratio is corrected by application of the expected slip ratio to yield a corrected speed ratio that is indicative of a slip condition. The operation of the motor is then adjusted to address the slip condition.