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. 26, 2012
Filed:
Oct. 21, 2008
Brian D. Kuras, Metamora, IL (US);
Michael G. Cronin, Peoria, IL (US);
Frank Anthony Demarco, East Peoria, IL (US);
Tyler Bowman, Peoria, IL (US);
Brian D. Kuras, Metamora, IL (US);
Michael G. Cronin, Peoria, IL (US);
Frank Anthony DeMarco, East Peoria, IL (US);
Tyler Bowman, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A system and method for variator control employs positively directed electronic make-up and flushing relief valves for more precise torque control of a hydraulic variator, especially during torque reversal, as well as improved cold weather operation. This can improve machine response during periods of severe torque change. The ability to more tightly control variator torque allows more precise torque management algorithms for power control and engine matching purposes. Moreover, the ability to positively control venting of the hydraulic circuit for purposes of fluid cooling allows for more consistent machine response regardless of ambient temperature.