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Title:
WORKING VEHICLE AND HYDRAULIC CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2018/055696
Kind Code:
A1
Abstract:
This working vehicle is provided with: a discharge oil passage (10) through which hydraulic oil discharged by a first hydraulic pump (2) to drive a bucket flows; a discharge oil passage (11) through which hydraulic oil discharged by a second hydraulic pump to drive an arm flows; a flow dividing and combining valve (13) for switching between a flow combining position at which the discharge oil passage (10) and the discharge oil passage (11) are in communication with each other and a flow dividing position at which the discharge oil passage (10) and the discharge oil passage (11) are separated. In the working vehicle, when either the pump pressure of the first hydraulic pump (2) or the pump pressure of the second hydraulic pump (3) is brought to a predetermined value by excavation work, the flow dividing and combining valve (13) is switched from the flow combining position to the flow dividing position. In the working vehicle, when the pump pressure of the first hydraulic pump (2) is higher than or equal to the predetermined value, the first hydraulic pump (2) and the second hydraulic pump (3) are controlled so that the amount of hydraulic oil discharged by the first hydraulic pump (2) will be greater than the amount of hydraulic oil discharged by the second hydraulic pump (3).

Inventors:
KOUNO KIICHIROU (JP)
MORI TADASHI (JP)
Application Number:
PCT/JP2016/077849
Publication Date:
March 29, 2018
Filing Date:
September 21, 2016
Export Citation:
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Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
F15B11/02; E02F9/22
Domestic Patent References:
WO2006123704A12006-11-23
WO2005047709A12005-05-26
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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