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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 10370823 B1

PDFFull Text
Date of Patent:
Aug. 06, 2019

Filed:

Dec. 17, 2014

Work vehicle and method of controlling work vehicle

Applicant:

Komatsu Ltd., Tokyo, JP;

Inventors:

Shunsuke Miyamoto, Atsugi, JP;

Masao Yoshizawa, Hiratsuka, JP;

Yasuo Fujiwara, Hiratsuka, JP;

Assignee:

KOMATSU LTD., Tokyo, JP;

Attorney:

Global IP Counselors, LLP

Primary Examiner:

Charles A Fox

Assistant Examiner:

Ryan P Dodd

Int. Cl.
CPC ...
B60K 6/445 (2007.10); B60K 6/365 (2007.10); E02F 9/20 (2006.01); B60W 10/06 (2006.01); B60W 10/08 (2006.01); B60W 10/10 (2012.01); F16H 59/18 (2006.01); F16H 3/44 (2006.01); F16H 3/72 (2006.01); B60K 6/387 (2007.10); B60W 30/182 (2012.01); B60W 20/30 (2016.01); B60W 20/00 (2016.01); E02F 9/22 (2006.01); F16H 37/10 (2006.01); E02F 3/28 (2006.01); B60K 6/38 (2007.10); F16H 61/66 (2006.01);
U.S. Cl.
CPC ...
E02F 9/2079 (2013.01); B60K 6/387 (2013.01); B60K 6/445 (2013.01); B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 10/10 (2013.01); B60W 20/30 (2013.01); B60W 30/182 (2013.01); E02F 9/202 (2013.01); E02F 9/2004 (2013.01); E02F 9/2075 (2013.01); F16H 3/44 (2013.01); F16H 3/728 (2013.01); F16H 59/18 (2013.01); B60K 6/365 (2013.01); B60K 2006/381 (2013.01); B60W 20/00 (2013.01); B60W 2300/17 (2013.01); B60W 2510/0638 (2013.01); B60W 2520/10 (2013.01); B60W 2710/0644 (2013.01); B60Y 2200/415 (2013.01); B60Y 2300/70 (2013.01); B60Y 2400/73 (2013.01); E02F 3/283 (2013.01); E02F 9/2066 (2013.01); E02F 9/2292 (2013.01); E02F 9/2296 (2013.01); F16H 2037/101 (2013.01); F16H 2061/6601 (2013.01); F16H 2061/6602 (2013.01); F16H 2200/2007 (2013.01); F16H 2200/2041 (2013.01); Y02T 10/6239 (2013.01); Y10S 903/903 (2013.01);
Abstract

A power transmission device of a work vehicle includes a mode switching mechanism configured to switch a drive power transmission route to one mode of at least two modes. A second mode is used in a range with the higher transmission speed ratio than a first mode. A controller increases the rotation speed of the engine from a first rotation speed for the engine corresponding to a first vehicle speed when the vehicle speed is within a range greater than the first vehicle speed where the transmission speed ratio reaches a predetermined first value that is less than the maximum value of the transmission speed ratio obtainable by the power transmission device. When the transmission route is in the second mode, the first value is greater than a second value of the transmission speed ratio at which the rotation speeds of the first motor and the second motor are equal.

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