Control device for slanting plate type variable capacity pump

Details Control device for slanting plate type variable capacity pump Control device for slanting plate type variable capacity pump

1998-04-15

2000-04-25

Moulis, Thomas N.

Pumps

Condition responsive control of drive transmission or pump...

Having condition responsive pumped fluid control

417 20, 417218, F04B 4900

Patent

active

060537078

ABSTRACT:
A control device is herein disclosed which comprises a drive piston 12p for changing the position of a slanting plate in a variable capacity pump 11, an electromagnetic proportional valve 13 for driving the drive piston, and a position detector 14 for detecting a position of the slanting plate. The control device performs a flow rate control of operating oil by controlling the electromagnetic proportional valve in accordance with a difference between a flow rate instruction value Fr for the operating oil and a position detection value from the position detector so as to change the position of the slanting plate. The control device further includes a pressure detector 18 for detecting a pressure of the operating oil supplied to an injection cylinder 10, and correcting means for correcting the flow rate instruction value on the basis of a pressure detection value from the pressure detector to output a corrected flow rate instruction value.

REFERENCES:
patent: 4932840 (1990-06-01), Takeuchi et al.
patent: 5219584 (1993-06-01), Itsuzi et al.
patent: 5443782 (1995-08-01), Nakamura et al.

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