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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 9580889 B1

PDFFull Text
Date of Patent:
Feb. 28, 2017

Filed:

Sep. 19, 2013

Work vehicle

Applicant:

Komatsu Ltd., Tokyo, JP;

Inventor:

Kazuki Kure, Kishiwada, JP;

Assignee:

KOMATSU LTD., Tokyo, JP;

Attorney:

Drinker Biddle & Reath LLP

Primary Examiner:

John Walters

Assistant Examiner:

James Triggs

Int. Cl.
CPC ...
E02F 9/22 (2006.01); F02D 29/02 (2006.01); F01P 5/04 (2006.01); E02F 9/20 (2006.01); F01P 1/06 (2006.01); F15B 11/08 (2006.01); F02D 29/04 (2006.01); E02F 3/76 (2006.01); F02N 11/08 (2006.01); F01P 11/06 (2006.01); E02F 9/08 (2006.01);
U.S. Cl.
CPC ...
E02F 9/226 (2013.01); E02F 9/0891 (2013.01); E02F 9/2066 (2013.01); E02F 9/2246 (2013.01); E02F 9/2292 (2013.01); E02F 9/2296 (2013.01); F01P 1/06 (2013.01); F01P 5/04 (2013.01); F01P 5/043 (2013.01); F02D 29/02 (2013.01); F15B 11/08 (2013.01); E02F 3/7604 (2013.01); E02F 3/7609 (2013.01); E02F 9/0866 (2013.01); F01P 2011/063 (2013.01); F02D 29/04 (2013.01); F02N 11/0818 (2013.01); F15B 2211/66 (2013.01);
Abstract

A work vehicle of the present invention includes an engine, a cooling core, a fan, a hydraulic drive unit, and an idle reduction execution unit. The cooling core is mounted in the work vehicle. The fan is configured to blow air to the cooling core and to be capable of making regular and reverse rotations. The hydraulic drive unit is configured to drive the fan by driving the engine. The idle reduction execution unit is configured to stop the engine based on a state of rotation of the fan caused by the hydraulic drive unit and based on an idle state. The idle reduction execution unit stops the engine on a condition that the fan makes regular rotation and the idle state has continued for a predetermined time, and does not stop the engine on a condition that the fan makes reverse rotation.

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