Variable displacement compressor improved in a lubrication mecha

Details Variable displacement compressor improved in a lubrication mecha Variable displacement compressor improved in a lubrication mecha

1998-09-15

2000-08-08

Yuen, Henry C.

Pumps

Expansible chamber type

Having pumping chamber pressure responsive distributor

4172222, 184 617, F04B 3910, F04B 5310

Patent

active

06099276&

ABSTRACT:
A variable displacement compressor controls a discharge displacement by changing an inclination of a swash plate (5) depending on a pressure differential between a crank chamber (3) and a suction chamber (13) thereby to change a piston stroke. A first communication passage (18) establishes communication between the crank chamber and the suction chamber. A first orifice (19) is provided in the first communication passage. A second communication passage (20) establishes communication between a discharge chamber (14) and the crank chamber. A pressure control valve (21) open/close controls the second communication passage so as to adjust a pressure in the crank chamber. A third communication passage (22) establishes communication between the discharge chamber and the crank chamber, bypassing the second communication passage. A second orifice (23) is provided in the third communication passage.

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