Title:
LOAD SENSING FLOW CONTROL SYSTEM FOR CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2018/074628
Kind Code:
A1
Abstract:
The present invention relates to a load sensing flow control system for a construction machine and, more specifically, to a load sensing flow control system for a construction machine, which can improve the operability of an operation lever for controlling the speed of a work device mounted to a construction machine, for example, an excavator. To this end, the present invention provides a load sensing flow control system for a construction machine, wherein, when a hydraulic pump discharges an operation oil at a maximum discharge flow rate that is allowed according to the input rotational speed of a motor, a control unit determines an effective pilot signal pressure for maximally opening a spool valve, detects an operation amount of the operation lever, and controls an electronic proportional pressure reducing valve such that a pilot signal pressure is applied to the spool valve up to the effective pilot signal pressure in proportion to the operation amount of the operation lever.
Inventors:
SHIN HUNGJU (KR)
Application Number:
PCT/KR2016/011808
Publication Date:
April 26, 2018
Filing Date:
October 20, 2016
Export Citation:
Assignee:
VOLVO CONSTR EQUIP AB (SE)
SHIN HUNGJU (KR)
SHIN HUNGJU (KR)
International Classes:
E02F9/22; E02F9/20; F15B13/02
Foreign References:
| KR20150044759A | 2015-04-27 | |||
| KR20120086061A | 2012-08-02 | |||
| KR20130075661A | 2013-07-05 | |||
| KR20120070933A | 2012-07-02 | |||
| JP2006322134A | 2006-11-30 |
Attorney, Agent or Firm:
KIM, Seon-Min (KR)
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