CONTROL METHOD FOR HYDRAULIC SYSTEM OF CONSTRUCTION MACHINERY

The present invention relates to a method for controlling a hydraulic system of construction machinery. The method for controlling a hydraulic system of construction machinery according to the present invention comprises an engine RPM estimating step (S160) of outputting a predicted virtual engine R...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	THO, YONG HO, JUNG, WOO YONG
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR DREDGING FIXED CONSTRUCTIONS FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS FOUNDATIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS HYDRAULIC ENGINEERING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING SOIL SHIFTING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	The present invention relates to a method for controlling a hydraulic system of construction machinery. The method for controlling a hydraulic system of construction machinery according to the present invention comprises an engine RPM estimating step (S160) of outputting a predicted virtual engine RPM value before an actual engine RPM is inputted by predicting: a variable rated engine RPM which is greater than a standard rated engine RPM and varying within a smaller range than a high idle engine RPM relative to the standard rated engine RPM; and a virtual engine RPM to be inputted later. Therefore, it is possible to have a pump torque margin in the initial stages when a work load is applied, and a drop in engine RPM remarkably lower than the rated engine RPM can be prevented even when the engine RPM is lowered by the work load.