Abstract: A slant plate compressor with a variable displacement mechanism including a driving mechanism having a drive shaft is disclosed. The compressor includes a compressor housing having a cylinder block. A plurality of peripherally located cylinders are formed through the cylinder block. A piston is slidably fitted in each of the cylinders and is reciprocated by the driving mechanism. An inner end of the drive shaft is rotatably supported in the cylinder block by bearing which is fixedly disposed within a central bore formed through the cylinder block. Both rearward and radial forces acting on the drive shaft are effectively received and compensated for by the bearing without providing an axial position adjusting element, such as, a washer having the various thicknesses for adjusting an axial position of the drive shaft.

Abstract: A slant plate type compressor, such as a wobble plate type compressor, with a variable displacement mechanism for use in a refrigeration circuit is disclosed. Two passageways communicate between the crank chamber and the suction chamber in the cylinder block. A bellows is disposed in a first passageway and controls communication between the crank chamber and the suction chamber in the first passageway. The bellows operates in accordance with the crank chamber pressure. A control valve is disposed in the second passageway and controls communication between the crank chamber and the suction chamber in the second passageway in response to signal from an external sensor. This configuration enables the compressor to be operated at maximum capacity when the refrigeration circuit is turned on until the temperature in the passenger compartment of a car reaches a desired temperature without input from the pressure in the crank chamber.