Control valve for a pump with variable displacement volume

Details Control valve for a pump with variable displacement volume Control valve for a pump with variable displacement volume

1987-03-06

1988-04-12

Smith, Leonard E.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417274, 418 26, F04B 4908

Patent

active

047370785

ABSTRACT:
A control valve for a variable displacement pump is improved so that the levelling of the pressure fluctuations of the pump is better and quicker. For this purpose an additional control piston portion on the control piston of the control valve is used. Corresponding to the deflection of the control piston the constriction cross-section set by the control piston portion between the supply connected to the pump pressure line and a passage leading to the control space of the variable pump is varied so that the pressure rise in the control space of the pump and also the pressure drop is accelerated.

REFERENCES:
patent: 4035105 (1977-07-01), Dantlgraber

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