Hydraulic circuit for a variable displacement pump

Details Hydraulic circuit for a variable displacement pump Hydraulic circuit for a variable displacement pump

1981-07-24

1983-12-20

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

60452, 417218, F16H 3946

Patent

active

044209371

ABSTRACT:
A hydraulic circuit for a so called feathering control of a variable displacement pump in which displacement of the variable displacement pump is controlled to a minimum when every actuator in a system is not in operation thereby keeping a power loss to a minimum. The hydraulic circuit includes a jet flow sensor for detecting a dynamic pressure of fluid. The jet flow sensor is disposed in a circuit for connecting a system pressure line to a reservoir and is adapted to convert static pressure of the fluid to dynamic pressure thereof. This detected dynamic pressure is introduced into a servo mechanism for the variable displacement pump for effecting feathering control.

REFERENCES:
patent: 2431094 (1947-11-01), Tucker
patent: 2892312 (1959-06-01), Allen et al.
patent: 3486334 (1969-12-01), Miller
patent: 3777492 (1973-12-01), Boydell et al.
patent: 3871178 (1975-03-01), Tominaga

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