HYDRAULIC SYSTEM FOR CONSTRUCTION EQUIPMENT

Title:

HYDRAULIC SYSTEM FOR CONSTRUCTION EQUIPMENT

Document Type and Number:

WIPO Patent Application WO/2014/157946

Kind Code:

A1

Abstract:

The present invention relates to a hydraulic system for construction equipment and, more specifically, to a hydraulic system of which an actuator is controlled by a pump/motor. The hydraulic system for construction equipment according to the present invention includes logic valves respectively provided to first and second hydraulic lines provided to the actuator. In addition, when the actuator must be operated in a state in which the operation of the actuator is stopped by the closing of the logic values, a pressure difference can be resolved by increasing the pressure in the pump/motor and logic value sections in advance even if a load is applied to the actuator, and thus the actuator can implement a desired operation without being affected by the load. That is, operation controllability of the actuator can be improved.

Inventors:

AN MIN HA (KR)
JUNG WOO YONG (KR)
CHO YONG LAK (KR)
SEO A REUM (KR)
JANG DAL SIK (KR)
LIM KWANG HO (KR)

Application Number:

PCT/KR2014/002562

Publication Date:

October 02, 2014

Filing Date:

March 26, 2014

Export Citation:

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Assignee:

DOOSAN INFRACORE CO LTD (KR)

International Classes:

F15B13/02; E02F9/22

Foreign References:

KR100790364B1	2008-01-02
KR20120072731A	2012-07-04
JP2011231823A	2011-11-17
JP2002174202A	2002-06-21
JP2010101446A	2010-05-06

Other References: