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.:

US 10851892 B1

Date of Patent:

Dec. 01, 2020

Filed:

Jun. 12, 2017

Method of estimating torque in a continuously variable transmission

Applicant:

Perkins Engines Company Limited, Peterborough, GB;

Inventor:

Michael Beyer, Chillocothe, IL (US);

Assignee:

Perkins Engines Company Limited, Peterborough, GB;

Attorney:

Miller, Matthias & Hull

Primary Examiner:

Edwin A Young

Int. Cl.

CPC ...

F16H 61/66 (2006.01); F16H 61/468 (2010.01); F16H 61/472 (2010.01); F16H 63/50 (2006.01); F16H 59/70 (2006.01); F16H 37/08 (2006.01); F16H 59/36 (2006.01);

U.S. Cl.

CPC ...

F16H 61/468 (2013.01); F16H 61/472 (2013.01); F16H 61/66 (2013.01); F16H 63/50 (2013.01); F16H 2037/0886 (2013.01); F16H 2059/363 (2013.01); F16H 2059/704 (2013.01); F16H 2200/2007 (2013.01);

Abstract

A method is provided for estimating input torque and output torque in a continuously variable transmission having a variator. The method comprising the steps of determining () a transmission Input and/or output speed, calculating () the speed of each of a plurality of transmission components by reflecting the transmission input and/or output speed through the transmission to each of the plurality of transmission components, and calculating () the speed rate of change of each of the plurality of transmission components. The inertia torque of each of the plurality of transmission components is calculated () based upon its respective speed rate of change and a predetermined component inertia value (). The method further comprises the steps of determining () a motor torque of the variator, and calculating () a transmission input torque and transmission output torque by reflecting the motor torque of the variator through the transmission to the transmission input and output. The calculated transmission Input and output torque values are adjusted () to account for the calculated inertia torque values of those of the plurality of transmission components which lie between the variator and the transmission input, and the variator and the transmission output, respectively.

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