Variable displacement compressor

Details Variable displacement compressor Variable displacement compressor

1999-03-26

2000-12-26

Thorpe, Timothy S.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

137 51, 137 56, F04B 126, G05D 1310

Patent

active

061649260

ABSTRACT:
A variable displacement compressor having a pressurizing passage, which extends through a cylinder block. The pressurizing passage connects a discharge chamber and a crank chamber. A valve is arranged in the pressurizing passage. A drive shaft rotates and produces centrifugal force that causes the valve to open the pressurizing passage. The pressure of the crank chamber is increased when the rotation of the drive shaft is accelerated thereby opening the pressurizing passage with the valve. This moves a swash plate such that its inclination, relative to a plane perpendicular to the drive shaft, decreases. As a result, the compressor shifts from a maximum displacement state to a minimum displacement state, which improves the acceleration performance of an engine connected to the compressor. Furthermore, the displacement of the compressor in the minimum displacement state is 50% of that in the maximum displacement state. This prevents an excessive decrease in the cooling capability of the compressor.

REFERENCES:
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patent: 4285311 (1981-08-01), Iio
patent: 4606705 (1986-08-01), Parekh
patent: 4872814 (1989-10-01), Skinner et al.
patent: 5071321 (1991-12-01), Skinner et al.
patent: 5362211 (1994-11-01), Iizuka et al.
patent: 5417552 (1995-05-01), Kayukawa
patent: 5842834 (1998-12-01), Kawaguchi et al.
patent: 5842835 (1998-12-01), Kawaguchi et al.

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