Title:
HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2017/099265
Kind Code:
A1
Abstract:
The present invention provides a hydraulic system for a construction machine, comprising: a hydraulic actuator connected to a hydraulic pump and driven by hydraulic oil, which is discharged and supplied from the hydraulic pump and fed back to a hydraulic tank; a flow control valve provided on the movement paths of the hydraulic oil, which moves between the hydraulic pump and the hydraulic actuator and between the hydraulic actuator and the hydraulic tank, so as to control the movement of the hydraulic oil; an accumulator provided on a regeneration path, which is branched from the movement path of the hydraulic oil directed toward the hydraulic tank, and storing the hydraulic oil introduced into the regeneration path when the flow control valve is switched to a neutral position; and a boost device connected to the accumulator and, when the flow control valve is switched to the neutral position such that the hydraulic oil discharged from the hydraulic pump cannot be supplied to the hydraulic actuator, using the hydraulic oil stored in the accumulator so as to supply, to the hydraulic actuator, the shortage of hydraulic oil required because of the continuous operation of the hydraulic actuator.
Inventors:
KIM JAE HONG (KR)
LEE JAE YONG (KR)
LEE JAE YONG (KR)
Application Number:
PCT/KR2015/013360
Publication Date:
June 15, 2017
Filing Date:
December 08, 2015
Export Citation:
Assignee:
VOLVO CONSTR EQUIP AB (SE)
KIM JAE HONG (KR)
LEE JAE YONG (KR)
KIM JAE HONG (KR)
LEE JAE YONG (KR)
International Classes:
E02F9/20; E02F9/12; E02F9/22; F15B13/02
Foreign References:
| JP2015090193A | 2015-05-11 | |||
| KR20150048415A | 2015-05-07 | |||
| KR20140038437A | 2014-03-28 | |||
| JP2009510358A | 2009-03-12 | |||
| JP2002327714A | 2002-11-15 |
Attorney, Agent or Firm:
KIM, Seon-Min (KR)
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