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US 6,615,581 B2Granted
Hydraulic oil flow controller for construction machine
AssigneeKomatsu Ltd.
InventorYasuhiro Kusuyama
Life of this patent
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AssigneeKomatsu Ltd.
InventorYasuhiro Kusuyama
Estimating the term…
A hydraulic oil flow controller for a construction machine comprises an operating valve 6 for supplying hydraulic oil discharged from hydraulic pimps 1 and 2 to an attachment, an attachment operating unit 11 for transmitting a pilot signal corresponding to the manipulated variable of the operating valve 6 and a solenoid control valve 12 for changing the flow characteristics of the pilot signal in accordance with a command from a controller 19. An increase and/or decrease signal is sent to the solenoid control valve 12 through the controller 19 from a monitor device 18 so that the flow of the hydraulic oil supplied to the actuator of the attachment is increased and/or decreased. Accordingly, a coefficient of fluctuation of the flow relative to a coefficient of fluctuation of the manipulated variable can be decreased in the work of the attachment of a hydraulic shovel and the operation efficiency upon operation of the attachment can be improved.
A hydraulic oil flow controller for a construction machine comprising an operating valve for supplying hydraulic oil from hydraulic pumps, to the actuator of an attachment of;
A hydraulic oil flow controller for a construction machine comprising an operating valve for supplying hydraulic oil from hydraulic pumps to the actuator of an attachment of an attachment operating unit for transmitting a pilot signal corresponding to a manipulated variable to the operating valve and a solenoid control valve for changing the flow characteristics of the pilot signal in accordance with a command from a controller, wherein an increase and/or decrease signal is sent to the solenoid control valve through the controller from a monitor device so that the flow of the hydraulic oil supplied to the actuator of the attachment is increased and/or decreased and the flow determined by the increase and/or decrease signal is displayed on a monitor screen, further comprising;
A hydraulic oil flow controller for a construction machine comprising an operating valve for supplying hydraulic oil from hydraulic pumps to the actuator of an attachment of an attachment operating unit for transmitting a pilot signal corresponding to a manipulated variable to the operating valve and a solenoid control valve for changing the flow characteristics of the pilot signal in accordance with a command from a controller, wherein an increase and/or decrease signal is sent to the solenoid control valve through the controller from a monitor device so that the flow of the hydraulic oil supplied to the actuator of the attachment is increased and/or decreased and the flow determined by the increase and/or decrease signal is displayed on a monitor screen, wherein the increase and/or decrease signal is transmitted to the controller by an increase and/or decrease switch provided on the monitor screen or in the vicinity of the monitor screen, and further comprising;
Dependencies are inferred from the claim text.