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:
Aug. 04, 2015
Filed:
Jan. 05, 2010
Peter J. Dix, Naperville, IL (US);
Garth H. Bulgrien, Ephrata, PA (US);
Robert C. Prasse, Chicago, IL (US);
Cecil A. Weeramantry, Darien, IL (US);
Haibo Guo, Naperville, IL (US);
Peter J. Dix, Naperville, IL (US);
Garth H. Bulgrien, Ephrata, PA (US);
Robert C. Prasse, Chicago, IL (US);
Cecil A. Weeramantry, Darien, IL (US);
Haibo Guo, Naperville, IL (US);
CNH Industrial America LLC, New Holland, PA (US);
Abstract
The method of estimating and controlling driveline torque in a continuously variable hydro-mechanical transmission uses pressure data and other metrics of a hydrostatic power unit of the transmission in lieu of actual driveline torque data. A mechanical efficiency of the transmission is determined as a function of whether the power unit is operating in a power generation or regeneration mode, and the torque output of the power unit is estimated from that and other hydrostatic parameters. This is used to estimate a torque output of a planetary power unit of the transmission, and the torque on an output member of the driveline is then estimated using that value, and appropriate corrective action taken.