Apparatus and method for operating fluid displacement apparatus

Details Apparatus and method for operating fluid displacement apparatus Apparatus and method for operating fluid displacement apparatus

1998-09-08

2000-08-15

Yuen, Henry C.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417270, F04B 126, F04B 4903

Patent

active

061026700

ABSTRACT:
A variable fluid displacement apparatus includes a plate which is located in a crank chamber and is tiltably connected to a drive shaft so as to vary the variable slant angle responsive to a pressure differential between the crank chamber and a suction chamber. A first communication path communicates the crank chamber with a discharge chamber to control pressure within the crank chamber. A first valve device opens and closes a first opening area in the first communication path to adjust the pressure level. A second valve device closes a second communication path, which communicates the crank chamber with the suction chamber. A second opening area in the second communication path is closed when a pressure difference between the crank chamber and the suction chamber falls below a predetermined value. Thus, a variable displacement compressor obtains a desired compression capacity after the variable displacement compressor commences operation.

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patent: 5318410 (1994-06-01), Kawamura et al.
patent: 5785502 (1998-07-01), Ota et al.

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