Control valve unit with independently operable valve mechanisms

Details Control valve unit with independently operable valve mechanisms Control valve unit with independently operable valve mechanisms

1997-07-30

2000-01-04

Freay, Charles G.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

F04B 126

Patent

active

060103124

ABSTRACT:
A control valve in a variable displacement compressor is disclosed. The compressor adjusts the discharge displacement based on control of the inclination of a swash plate located in a crank chamber. The compressor includes a supply passage for connecting a discharge chamber with the crank chamber to supply the gas from the discharge chamber to the crank chamber and a bleeding passage for connecting the crank chamber with a suction chamber to release the gas from the crank chamber to the suction chamber. The control valve includes a first valve mechanism for selectively opening and closing the supply passage, a second valve mechanism for adjusting the flow rate of the gas released from the crank chamber to the suction chamber through the bleeding passage, and a solenoid mechanism for actuating the first valve mechanism and the second valve mechanism. The first valve mechanism and the second valve mechanism operate independently. The first valve mechanism, the second valve mechanism and the solenoid mechanism are retained in a single housing.

REFERENCES:
patent: 4606705 (1986-08-01), Parekh
patent: 5145326 (1992-09-01), Kimura et al.
patent: 5173032 (1992-12-01), Taguchi et al.
patent: 5332365 (1994-07-01), Taguchi
patent: 5586870 (1996-12-01), Kawaguchi et al.
patent: 5702235 (1997-12-01), Hirota et al.
patent: 5785502 (1998-07-01), Ota et al.
patent: 5842835 (1998-12-01), Kawaguchi et al.

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