Title:
HYDRAULIC CONTROL DEVICE AND HYDRAULIC CONTROL METHOD FOR CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2017/094985
Kind Code:
A1
Abstract:
A hydraulic control device for a construction machine comprises: an accumulator which stores high-pressure hydraulic fluid discharged from a boom cylinder for operating a boom of a construction machine; a hydraulic motor which is connected to the accumulator and is driven by the high-pressure hydraulic fluid; a pressure sensor for measuring the pressure of the accumulator; and a control unit which is connected to the accumulator and the hydraulic motor so as to control the operations thereof, and has a determining unit for determining the failure or not of the hydraulic motor by receiving the pressure value of the accumulator and the number of rotations of the hydraulic motor when the compressed hydraulic fluid is supplied to the hydraulic motor from the accumulator.
Inventors:
JOO CHOON-SHIK (KR)
Application Number:
PCT/KR2016/005791
Publication Date:
June 08, 2017
Filing Date:
June 01, 2016
Export Citation:
Assignee:
DOOSAN INFRACORE CO LTD (KR)
International Classes:
E02F9/22; E02F9/20; E02F9/24; E02F9/26
Domestic Patent References:
| WO2014208796A1 | 2014-12-31 |
Foreign References:
| KR20150110597A | 2015-10-02 | |||
| KR20140063721A | 2014-05-27 | |||
| KR20120080645A | 2012-07-17 | |||
| KR20140135690A | 2014-11-26 |
Attorney, Agent or Firm:
PARK, Pil-jin et al. (KR)
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