Variable displacement wobble plate type compressor with wobble a

Details Variable displacement wobble plate type compressor with wobble a Variable displacement wobble plate type compressor with wobble a

1987-04-20

1988-03-15

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417270, F04B 4900, F04B 176

Patent

active

047309865

ABSTRACT:
A variable displacement wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for refrigerant before compression, a discharge chamber for refrigerant after compression, suction, and compression, and discharge cylinder bores, pistons reciprocated by the wobble plate within the cylinder bores for compressing the refrigerant, a crankcase with a crank chamber to receive therein a drive and a wobble plate mechanism mounted about a drive shaft connectable to a rotary drive source, i.e., a vehicle engine, connected to the pistons to cause reciprocating motion of the pistons and capable of changing the wobble angle thereof, a first communication passageway providing a fluid communication between the crankcase chamber and the discharge chamber, a first control valve for closing and opening the first passageway in response to a change in a fluid pressure indicative of a refrigerating load change, a second communication passageway for permitting adjustable evacuation of a blowby gas from the crankcase chamber to the suction chamber, and a second control valve changing an extent of opening of the second communication passageway in response to an electrical signal or signals indicating a change in a physical value relative to the air-conditioning circuit and the vehicle as well as in response to a change in a fluid pressure level in the crankcase chamber.

REFERENCES:
patent: 4674957 (1987-06-01), Ohta et al.
patent: 4685866 (1987-04-01), Takenaka et al.
patent: 4688997 (1987-07-01), Suzuki et al.

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