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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 9695575 B1

PDFFull Text
Date of Patent:
Jul. 04, 2017

Filed:

Oct. 31, 2014

Work vehicle and method of controlling same

Applicant:

Komatsu Ltd., Tokyo, JP;

Inventors:

Shunsuke Miyamoto, Atsugi, JP;

Yasunori Ohkura, Kawasaki, JP;

Assignee:

KOMATSU LTD., Tokyo, JP;

Attorney:

Global IP Counselors, LLP

Primary Examiner:

Redhwan K Mawari

Assistant Examiner:

Anshul Sood

Int. Cl.
CPC ...
E02F 9/20 (2006.01); B60K 6/365 (2007.10); B60K 6/445 (2007.10); B60K 6/52 (2007.10); B60L 11/14 (2006.01); B60W 10/02 (2006.01); B60W 10/08 (2006.01); B60W 10/10 (2012.01); B60W 20/00 (2016.01); F16H 3/72 (2006.01); F16H 61/02 (2006.01); E02F 9/22 (2006.01); E02F 3/28 (2006.01); E02F 3/42 (2006.01); F16H 37/10 (2006.01);
U.S. Cl.
CPC ...
E02F 9/2079 (2013.01); B60K 6/365 (2013.01); B60K 6/445 (2013.01); B60K 6/52 (2013.01); B60L 11/14 (2013.01); B60W 10/02 (2013.01); B60W 10/08 (2013.01); B60W 10/10 (2013.01); B60W 20/00 (2013.01); E02F 3/283 (2013.01); E02F 3/422 (2013.01); E02F 9/2066 (2013.01); E02F 9/2075 (2013.01); E02F 9/2292 (2013.01); E02F 9/2296 (2013.01); F16H 3/727 (2013.01); F16H 3/728 (2013.01); F16H 61/0246 (2013.01); F16H 2037/104 (2013.01); F16H 2200/2035 (2013.01); Y02T 10/6239 (2013.01); Y02T 10/6265 (2013.01);
Abstract

A controller includes a neutral control determination unit, a forward-reverse clutch control unit, and a commanded torque setting unit. The neutral control determination unit executes quasi-neutral control when a quasi-neutral control determination condition is satisfied. The quasi-neutral control determination condition includes cases where the forward-reverse operation member is in the neutral position. The forward-reverse clutch control unit keeps the forward-travel clutch or the reverse-travel clutch engaged during the quasi-neutral control. During quasi-neutral control, the commanded torque setting unit determines a commanded torque sent to the motor so that a neutral state is set where the output torque from the power transmission device to the travel device is kept at a prescribed value regardless of the drive power output from the engine.

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