Control system for a vane type variable displacement pump

Details Control system for a vane type variable displacement pump Control system for a vane type variable displacement pump

1983-12-13

1985-07-30

Vrablik, John J.

Rotary expansible chamber devices

With changeable working chamber magnitude

Spring or fluid biased movable member

418 27, 418 30, 417220, F04C 200, F04C 1504

Patent

active

045318980

ABSTRACT:
There is provided a control device for a vane type variable displacement pump. The control device eliminates the need of a hydraulic cylinder to control the eccentricity of a cam ring of the vane pump. A pressure difference between a second chamber and a high pressure side of the pump first chamber on a low-pressure side of the vane pump is utilized to determine the eccentricity of the cam ring. A regulator valve is connected to the first chamber and with the second chamber in order to allow or prevent communication between the two chambers. A spring is also provided to always force the cam ring in a direction so as to make the eccentricity of the cam ring larger.

REFERENCES:
patent: 2823614 (1958-02-01), Lapsley
patent: 2878755 (1959-03-01), O'Conner et al.
patent: 2894458 (1959-07-01), Hallman
patent: 3238884 (1966-03-01), Wright
patent: 3743445 (1973-07-01), Dworak et al.

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