Hydraulic system of excavator, excavator, and method for controlling excavator

A hydraulic system of an excavator includes a work state determination unit and a valve control unit. When it is determined that a work state of working equipment is a heavy excavation state, the valve control unit controls a first boom operation valve, a first arm operation valve, a first bucket op...

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Hauptverfasser: Sumino, Wataru, Nagura, Shinobu, Hishinuma, Yuichi
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creator Sumino, Wataru
Nagura, Shinobu
Hishinuma, Yuichi
description A hydraulic system of an excavator includes a work state determination unit and a valve control unit. When it is determined that a work state of working equipment is a heavy excavation state, the valve control unit controls a first boom operation valve, a first arm operation valve, a first bucket operation valve, a second boom operation valve, a second arm operation valve, and a second bucket operation valve such that passing of hydraulic oil from a first hydraulic pump to a boom cylinder is restricted, hydraulic oil is supplied from a second hydraulic pump to a boom cylinder, hydraulic oil is supplied from both the first hydraulic pump and the second hydraulic pump to an arm cylinder, and hydraulic oil is supplied from one or both of the first hydraulic pump and the second hydraulic pump to a bucket cylinder.
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subjects DREDGING
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
title Hydraulic system of excavator, excavator, and method for controlling excavator
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