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Title:
WORK VEHICLE AND OPERATION CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2017/138070
Kind Code:
A1
Abstract:
A work vehicle detects the pressure of a hydraulic fluid supplied to an arm cylinder. The work vehicle determines the operation content for the arm. The work vehicle comprises a relief valve that can set the relief pressure of the hydraulic fluid in a hydraulic circuit to a first set pressure or to a second set pressure higher than the first set pressure. With the work vehicle, the relief pressure of the relief valve is set to the first set pressure under conditions that the detected pressure is greater than or equal to a predetermined value and the operation content is determined to be excavation operations, and the relief pressure of the relief valve is set to the second set pressure when the conditions are not met.

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Inventors:
OHIGASHI KOJI (JP)
MORI KIMIHIRO (JP)
KUMAGAI KAZUKI (JP)
Application Number:
PCT/JP2016/053663
Publication Date:
August 17, 2017
Filing Date:
February 08, 2016
Export Citation:
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Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
E02F9/22
Domestic Patent References:
WO2005108797A12005-11-17
Foreign References:
JP2013053740A2013-03-21
JP2009138495A2009-06-25
JP2013245457A2013-12-09
JP2010156134A2010-07-15
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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