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1. (WO2018048291) SYSTEM FOR CONTROLLING CONSTRUCTION MACHINERY AND METHOD FOR CONTROLLING CONSTRUCTION MACHINERY

Pub. No.:    WO/2018/048291    International Application No.:    PCT/KR2017/010012
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Wed Sep 13 01:59:59 CEST 2017
IPC: E02F 9/22
F15B 13/02
Applicants: DOOSAN INFRACORE CO., LTD.
두산인프라코어 주식회사
Inventors: KIM, Chang-mook
김창묵
JUNG, Woo-yong
정우용
AHN, Hyeon-sik
안현식
KIM, Ki-yong
김기용
Title: SYSTEM FOR CONTROLLING CONSTRUCTION MACHINERY AND METHOD FOR CONTROLLING CONSTRUCTION MACHINERY
Abstract:
A system for controlling construction machinery comprises: a hydraulic pump; first and second actuators respectively connected to the hydraulic pump through first and second parallel lines; first and second control valves for respectively controlling operations of the first and second actuators according to the displacement of spools provided therein; first and second spool displacement adjustment valves for supplying, to each of the spools, pilot signal pressures for controlling displacement of the spools in the first and second control valves, according to an inputted control signal; and a control valve control unit for outputting the control signal to the first and second spool displacement adjustment valves according to an operation signal of a worker, limiting a maximum allowable value of an operation signal for the first actuator to a value selected by the worker when an operation signal for a combined operation of the first and second actuators is received, and performing adjustment such that a spool displacement of the second control valve is limited according to the limited operation signal for the first actuator.