| 摘要 |
An electronic hydraulic system for construction equipment is provided to manipulate an electronic joystick or a remote controller and to supply the flow rate and fluid pressure of the dosage required in the actuator of the construction machinery. An electronic hydraulic system for construction equipment comprises first and second pumps(70a,70b) which supplies working fluid to the first and the second group actuator, a first hydraulic line(91) wherein the working fluid discharged from the first pump moves to the first group actuator, a second hydraulic line(97) wherein the working fluid discharged from the second pump moves to the second group actuator, a switch valve(80) which changes the direction so that the working fluid of the second hydraulic line and the first fluid pressure line join, a regenerative circuit which supplies a part of the working fluid to the actuator and reproduces it, an actuator used oil amount calculation unit which calculates a recycling flux supplied to actuator in the regeneration circuit, a swash plate controller which produces the swash plate angle of the pump, and a driving part of electronic proportion pressure reducing valve which controls the swash plate angle of the first and the second pump.
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