Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1997-03-26
1998-11-24
Nguyen, Hoang
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60459, F16D 3102
Patent
active
058392793
ABSTRACT:
A hydraulic actuator operation controller is shown to make it possible to easily change the operation speeds of a hydraulic actuator for a control input of an operating instrument. A signal input from a control input detection device for detecting the control input of an operating lever is converted according to a logical function by a signal conversion unit. The signal conversion unit increases or decreases the signal in magnitude and outputs the converted signal to a pump control device. The pump control device outputs an instruction to a capacity change device such as an electromagnetic proportional control valve connected to a hydraulic pump. The converted signal is also provided to a valve control device for outputting an instruction to a valve opening-degree control device such as electromagnetic proportional control valves connected to a control valve.
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Patent Abstract of Japan, Publication No. 02125032A, May 1990.
Hasuike Makoto
Moriya Naoyuki
Murota Isao
Nguyen Hoang
Shin Caterpillar Mitsubishi Ltd.
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