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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 9625033 B1

PDFFull Text
Date of Patent:
Apr. 18, 2017

Filed:

Jun. 18, 2014

Work vehicle

Applicant:

Komatsu Ltd., Tokyo, JP;

Inventors:

Makoto Naito, Komatsu, JP;

Shinichi Naito, Yuuki, JP;

Assignee:

KOMATSU LTD., Tokyo, JP;

Attorney:

Global IP Counselors, LLP

Primary Examiner:

Dirk Wright

Int. Cl.
CPC ...
F16H 61/00 (2006.01); F16H 61/16 (2006.01); F16H 59/64 (2006.01); F16H 61/02 (2006.01); F16H 61/686 (2006.01); E02F 9/22 (2006.01); E02F 9/20 (2006.01); F16H 3/46 (2006.01);
U.S. Cl.
CPC ...
F16H 61/16 (2013.01); F16H 59/64 (2013.01); F16H 61/02 (2013.01); F16H 61/686 (2013.01); B60W 2710/1083 (2013.01); E02F 9/202 (2013.01); E02F 9/226 (2013.01); E02F 9/2253 (2013.01); F16H 3/46 (2013.01); F16H 2200/2005 (2013.01);
Abstract

A hydraulic oil supply circuit of a work vehicle is configured to supply hydraulic oil to a transmission. A hydraulic oil warming circuit is configured to warm up the hydraulic oil. A control unit is configured to control the transmission, the hydraulic oil supply circuit, and the hydraulic oil warming circuit. The transmission includes a hydraulic clutch and a clutch control valve. The clutch control valve is configured to control the pressure of the hydraulic oil supplied to the hydraulic clutch according to a command from the control unit. When the control unit determines that the temperature of the hydraulic oil is low, it is configured to output a warming up command for operation of a warming up function. The hydraulic oil warming circuit is configured to warm up the hydraulic oil by causing a pressure loss in a flow path for the hydraulic oil.

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