METHOD FOR CONTROLLING FLOW RATE OF HYDRAULIC PUMP OF CONSTRUCTION MACHINE

Title:

METHOD FOR CONTROLLING FLOW RATE OF HYDRAULIC PUMP OF CONSTRUCTION MACHINE

Document Type and Number:

WIPO Patent Application WO/2016/111392

Kind Code:

A1

Abstract:

Disclosed is a method for controlling the flow rate of a hydraulic pump in order to reduce the discharge flow rate of the hydraulic pump when the upper rotating body of an excavator rotates rapidly. The present invention relates to a method for controlling the flow rate of a hydraulic pump, and provides a method for controlling the flow rate of a hydraulic pump of a construction machine, comprising: a step of detecting the operation amount of a rotation operation lever, and the rotation pressure generated in a swing motor; a step of calculating the flow rate required for rotating, the flow rate corresponding to the operation amount of the rotation operation lever; a step of calculating a rotation acceleration first inclination value for increasing the discharge flow rate of the hydraulic pump to a certain inclination value from a rotation initiation time when the upper rotating body rotates; a step of calculating a second inclination value compensating for the first inclination value by a difference value between the detected rotation pressure value of the swing motor and the reference pressure corresponding to the set pressure of the relief valve of the swing motor; and a step of restricting the discharge flow rate of the hydraulic pump such that the increased amount of the flow rate required for rotating is restricted to the flow rate of the second inclination value.

Inventors:

KIM DONG-SOO (KR)

Application Number:

PCT/KR2015/000179

Publication Date:

July 14, 2016

Filing Date:

January 08, 2015

Export Citation:

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Assignee:

VOLVO CONSTR EQUIP AB (SE)
KIM DONG-SOO (KR)

International Classes:

E02F9/12; E02F9/20; F15B13/02

Domestic Patent References:

WO2009123134A1

2009-10-08

Foreign References:

KR20130100046A	2013-09-09
KR101164669B1	2012-07-11
JP2002265187A	2002-09-18
KR0185429B1	1999-04-01

Other References: