Title:
AUTOMATIC CONTROL SYSTEM AND METHOD FOR JOYSTICK CONTROL-BASED CONSTRUCTION EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2014/092355
Kind Code:
A1
Abstract:
The present invention relates to an automatic control system which controls a construction operation apparatus to which a joystick is applied and, more particularly, to an automatic control system for a joystick control-based construction equipment, including: a hydraulic pump which discharges a working fluid in a hydraulic tank so as to supply the working fluid to an actuator; an actuator which drives the construction operation apparatus using the working hydraulic pressure of the hydraulic pump; first electronic hydraulic pressure control valves which are respectively installed at the piston side inlet flow path and the rod side inlet flow path connected to the actuator from the hydraulic pump; second electronic hydraulic pressure control valves which are respectively installed at the piston side outlet flow path and the rod side outlet flow path connected to the hydraulic tank from the actuator; and a control unit which controls the first electronic hydraulic pressure control valves and the second electronic hydraulic pressure control valves connected to the actuator independent of each other. According to the present invention, a hydraulic system for construction equipment is configured as a closed center system which converts an input signal of an electric or hydraulic joystick to a speed signal for the operation apparatus and the speed of the operation equipment is controlled regardless of external load conditions. Accordingly, operator fatigue can be minimized so as to improve operation efficiency, the ability of an unskilled person to control the operation apparatus can be improved, and regular operations can be made into a pattern for the automation of the construction equipment.
Inventors:
LEE JONG CHAN (KR)
CHOI LIM GOOK (KR)
KWON YOUNG MIN (KR)
YIM JONG HYUNG (KR)
CHOI LIM GOOK (KR)
KWON YOUNG MIN (KR)
YIM JONG HYUNG (KR)
Application Number:
PCT/KR2013/010578
Publication Date:
June 19, 2014
Filing Date:
November 20, 2013
Export Citation:
Assignee:
HYUN DAI HEAVY IND CO LTD (KR)
International Classes:
E02F9/22; F15B13/02
Foreign References:
| JPH09328786A | 1997-12-22 | |||
| KR20110139344A | 2011-12-29 | |||
| JP2006242110A | 2006-09-14 | |||
| JP2000054437A | 2000-02-22 | |||
| KR20120003173A | 2012-01-10 |
Other References:
See also references of EP 2933387A4
Attorney, Agent or Firm:
KIM, In Han et al. (KR)
김인한 (KR)
김인한 (KR)
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