CONTROL DEVICE FOR HYDRAULIC MACHINE

Title:

CONTROL DEVICE FOR HYDRAULIC MACHINE

Document Type and Number:

WIPO Patent Application WO/2018/190295

Kind Code:

A1

Abstract:

When a hydraulic machine such as an excavating revolving work machine works in an environment in which the engine output is reduced, such as in a low-pressure atmosphere at a high altitude, there is a problem in that noise is generated when the engine rotation speed is increased to compensate for insufficient engine torque; therefore, there is a demand for a configuration that is capable of handling an environment in which the engine output is reduced, without generating noise. On the basis of the detection of a state quantity related to an environment in which the engine output is reduced, this control device for a hydraulic machine corrects a control output value, which is applied to an electromagnetic proportional valve used for load-sensing valve control in a load-sensing pump control system. When an engine-speed-sensing pump control system is employed, a control output value generated on the basis of the detection of the actual engine reduction is combined with a control output value from the load-sensing pump control system.

Inventors:

SHIROUZU TAKAYUKI (JP)
MATSUYAMA HIROSHI (JP)
ITANI MASAHIRO (JP)

Application Number:

PCT/JP2018/014920

Publication Date:

October 18, 2018

Filing Date:

April 09, 2018

Export Citation:

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Assignee:

YANMAR CO LTD (JP)

International Classes:

F15B11/00; E02F9/22; F02D29/04

Domestic Patent References:

WO2012050136A1

2012-04-19

Foreign References:

JP2012241742A	2012-12-10
JP2004132197A	2004-04-30
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Other References: