Failsafe electrohydraulic control system for variable displaceme

Details Failsafe electrohydraulic control system for variable displaceme Failsafe electrohydraulic control system for variable displaceme

1987-04-29

1989-04-25

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Servo-motor having externally operated control valve sets...

60445, 60449, 60451, 60452, 417218, 7386153, 7386234, F16H 3946, F04B 4906, G01L 310, G01F 100

Patent

active

048235520

ABSTRACT:
An electrohydraulic system for control of a variable output pump includes a microprocessor-based controller receiving inputs from condition sensors coupled to the pump and command inputs from a remote master controller. The controller supplies outputs to an electrohydraulic valve for metering hydraulic fluid to a pump control port and thereby controlling pump operation in any one of a number of preselected and prestored pump control modes. A hydromechanical valve is connected in parallel with the electrohydraulic valve for controlling pump operation in the event of electrical malfunction or failure. Circuitry connected between the pump condition sensors and the control computer prevents aliasing errors due to mismatch between the computer sampling frequency and pump speed. A pump torque sensor measures pump input shaft torque.

REFERENCES:
patent: 2889780 (1959-06-01), Binford
patent: 2999482 (1961-09-01), Bower
patent: 3545265 (1970-12-01), McIlraith et al.
patent: 4199942 (1980-04-01), Kasper
patent: 4293284 (1981-10-01), Carlson et al.
patent: 4297899 (1981-11-01), Blaney et al.
patent: 4335867 (1982-06-01), Bihlmaier
patent: 4347748 (1982-09-01), Pierson
patent: 4401009 (1983-08-01), Zeuner et al.
patent: 4432703 (1984-02-01), Beutler et al.
patent: 4459860 (1984-07-01), Walters
patent: 4496289 (1985-01-01), Heiser et al.
patent: 4502109 (1985-02-01), Delmedge et al.
patent: 4510750 (1985-04-01), Izumi et al.
patent: 4520674 (1985-06-01), Canada et al.
patent: 4520681 (1985-06-01), Moore et al.
patent: 4525068 (1985-06-01), Mannava et al.
patent: 4561250 (1985-12-01), Aoyagi et al.
patent: 4581699 (1986-04-01), Delmedge et al.
patent: 4586330 (1986-05-01), Watanabe et al.
patent: 4590806 (1986-05-01), Lutton et al.
patent: 4602515 (1986-07-01), Eichenlaub
patent: 4651045 (1987-03-01), Wagner
patent: 4655689 (1987-04-01), Westveer et al.
patent: 4683746 (1987-08-01), Cullingford et al.
patent: 4685063 (1987-08-01), Weihrich et al.
patent: 4714005 (1987-12-01), Leemhuis
Yeaple, F. Fluid Power Design Handbook, New York, New York: Marcel Dekker, Inc. (1984), p. 124.

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