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|1. (WO2018048291) SYSTEM FOR CONTROLLING CONSTRUCTION MACHINERY AND METHOD FOR CONTROLLING CONSTRUCTION MACHINERY|
|Applicants:||DOOSAN INFRACORE CO., LTD.
|Title:||SYSTEM FOR CONTROLLING CONSTRUCTION MACHINERY AND METHOD FOR CONTROLLING CONSTRUCTION MACHINERY|
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.