WORK MACHINE - HITACHI CONSTRUCTION MACH CO

Title:

WORK MACHINE

Document Type and Number:

WIPO Patent Application WO/2020/194732

Kind Code:

A1

Abstract:

A work machine is provided with which it is possible to drive an actuator faster and more accurately by accurately supplying a target flow rate to the actuator regardless of load fluctuation when a vehicle body is autonomously controlled by instruction input from a controller, while ensuring high operability when an operator performs manual operation.　The controller controls a plurality of auxiliary flow rate control devices so that, when deactivation of a region limit control function is indicated, the supply flow rate from a hydraulic pump to a plurality of direction control valves varies according to the load fluctuation of a plurality of hydraulic actuators, and when activation of the region limit control function is indicated, the controller controls the plurality of auxiliary flow rate control devices so that the supply flow rate from the hydraulic pump to the plurality of direction control valves does not vary according to the load fluctuation of the plurality of hydraulic actuators.

Inventors:

KUMAGAI KENTO (JP)
IMURA SHINYA (JP)
SUGIYAMA GENROKU (JP)
KODAKA KATSUAKI (JP)
TSURUGA YASUTAKA (JP)
CHIBA TAKAAKI (JP)

Application Number:

PCT/JP2019/013839

Publication Date:

October 01, 2020

Filing Date:

March 28, 2019

Export Citation:

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Assignee:

HITACHI CONSTRUCTION MACH CO (JP)

International Classes:

E02F9/22

Foreign References:

JP2018080510A	2018-05-24
JPS564911B2	1981-02-02
JP3056254B2	2000-06-26
JP2005121155A	2005-05-12
JPH0813547A	1996-01-16
JPH06159309A	1994-06-07
JP2016061387A	2016-04-25
US20090159302A1	2009-06-25
JP3056254B2	2000-06-26
JPS564911B2	1981-02-02

Other References: