发明名称 |
PRESSURE-CONTROL-TYPE INDEPENDENT FLOW CONTROL HYDRAULIC SYSTEM FOR EXCAVATOR |
摘要 |
An independent flow rate controlling hydraulic system for pressure control of an excavator, in which a hydraulic system of the excavator can be variably controlled via independent flow rate control. The hydraulic system includes a plurality of actuators which actuate a working apparatus, a pressure control-type hydraulic pump which feeds working fluid to the actuator, first and second electronic proportional control valves which are disposed at a piston-side inlet flow path and a load-side inlet flow path connected from the hydraulic pump to the actuators, third and fourth electronic proportional control valves which are disposed at a piston-side outlet flow path and a load-side outlet flow path connected from the actuators to a hydraulic tank, and a control unit which variably controls areas of the flow paths by controlling the first, second, third and fourth electronic proportional control valves depending on an amount by which a joystick is manipulated. |
申请公布号 |
EP2857602(A4) |
申请公布日期 |
2016.02.17 |
申请号 |
EP20130797627 |
申请日期 |
2013.05.27 |
申请人 |
HYUNDAI HEAVY INDUSTRIES CO., LTD. |
发明人 |
CHOI, LIM-GOOK;SHIN, DONG-BIN;PARK, TAE-SUNG;LEE, JONG-CHAN |
分类号 |
E02F9/22;E02F3/43;F15B11/00;F15B13/044 |
主分类号 |
E02F9/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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