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Patent Searching and Data


Title:
CONSTRUCTION MACHINE AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/010634
Kind Code:
A1
Abstract:
A construction machine, according to an embodiment of the present invention, including a boom comprises: an engine for generating power; a main pump driven by means of the engine so as to discharge working fluid; a working fluid tank for storing the working fluid to be discharged by the main pump; a boom cylinder which raises and lowers the boom, and which is divided into a head side and a rod side; a regeneration line connected to the head side of the boom cylinder so that the working fluid discharged from the head side of the boom cylinder moves therein; a regeneration motor operated with working fluid, having moved through the regeneration line, so as to support the engine; an accumulator connected to the regeneration line so as to accumulate the working fluid discharged from the boom cylinder; a boom regeneration valve for opening and closing the regeneration line; and a main control valve for controlling the supply, to the boom cylinder, of the working fluid discharged by the main pump, and discharging, to the working fluid tank, some of the working fluid discharged from the head side of the boom cylinder during a lowering operation of the boom.

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Inventors:
KANG BYUNGIL (KR)
Application Number:
PCT/KR2020/008805
Publication Date:
January 21, 2021
Filing Date:
July 06, 2020
Export Citation:
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Assignee:
DOOSAN INFRACORE CO LTD (KR)
International Classes:
E02F9/22
Foreign References:
KR20110029634A2011-03-23
KR20180051496A2018-05-16
JPH06341131A1994-12-13
KR20150018573A2015-02-23
US20080110165A12008-05-15
Attorney, Agent or Firm:
WETHEPEOPLE IP & LAW FIRM (KR)
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