Abstract: Variable displacement compressors 30 may include a rotor 7 that is press-formed from a plate W. The rotor 7 is fixedly mounted on a drive shaft 6 and is coupled to a swash plate 8 via a hinge device 20. The hinge device 20 preferably permits the swash plate 8 to rotate with the rotor 7 as well as the drive shaft 6 and also may permit the swash plate 8 to change its inclination angle relative to the rotor 7 as well as the drive shaft 6. The swash plate 8 may be coupled to a piston(s) 11 that reciprocates within a cylinder bore(s) 2a.

Abstract: A swash plate type compressor including; a rotary drive shaft having an axis of rotation; a swash plate supported by the drive shaft such that the swash plate is inclined or tiltable with respect to a plane perpendicular to the axis of rotation of the shaft; a housing which supports the drive shaft such that the drive shaft is rotatable and axially immovable relative to the housing, which has a plurality of cylinder bores which are located at respective circumferential portions radially spaced from the axis of rotation of the drive shaft and which extend in a direction parallel to the drive shaft; a plurality of pistons each including a head portion slidably engaging a corresponding one of the cylinder bores, and an engaging portion engaging a radially outer portion of opposite surfaces of the swash plate, each piston being reciprocated by the swash plate rotated with the drive shaft; and a plurality of shoes each of which is disposed between one of the opposite surfaces of the swash plate and the engaging po

Abstract: A variable displacement compressor 10 includes a wall 1a that seals a cylinder bore 14, and is integrally formed with a cylinder block 1. A rear plate 5 having a plate-like shape is fastened via a gasket 6 to a location that extends to the inner rear side of a wall 1a. Suction valves 40 and discharge valves 44 are disposed within the wall 1a.

Abstract: A compressor includes a housing, a compression mechanism, a rotary unit and a sliding bearing. The compression mechanism compresses refrigerant in the housing. The rotary unit drives the compression mechanism. The sliding bearing is supported in the housing while rotatably supporting the rotary unit. The sliding bearing has a base member, porous metal layer and fluoro resin layer. The surface of the base member is coated with the porous metal layer having solid lubricating performance. The surface is coated with the fluoro resin layer through the porous metal layer.

Abstract: A method of producing a shoe for a swash plate type compressor, said shoe being disposed between a swash plate and a piston of said swash plate type compressor, the method comprising: a forming step of forming a steel blank into a shoe product including an end product shoe and a pre size-adjusted shoe; and a nitriding step of effecting a nitriding treatment on said shoe product; and wherein a quenching treatment is not effected after said forming step.

Abstract: variable displacement compressor has a drive shaft extending through a crank chamber. A lug plate is integrally fixed to the drive shaft. A drive plate is connected to and driven by the lug plate by a hinge mechanism. The drive plate inclines with respect to the drive shaft to vary the displacement of the compressor. The hinge mechanism has a linear guide on the lug plate and a pin projecting from the drive plate toward the lug plate. A bearing surface engages the pin. The pin has an axis that intersects an axis of the guide. The axis of the pin is parallel to the axis of the drive shaft when the compressor operates with a maximum load.

Abstract: A compressor is provided in which the arrangement and the position of a spring chamber, in which a coil spring biasing a main shaft is accommodated, are designed and the various designs of the compressor is possible.

Abstract: A cam plate of a variable displacement compressor is easily manufactured. The compressor includes a lug plate fixed to a drive shaft, a cam plate supported in an inclinable manner by the drive shaft, and a hinge mechanism connecting the lug plate and the cam plate. The cam plate includes a disk engaged with a piston and a joint formed separately from the disk and fixed to the disk. The joint forms the hinge mechanism. At least one of the joint and the disk is press-formed.

Abstract: A displacement control apparatus is used for a variable displacement compressor. The compressor is driven by an internal combustion engine. The compressor has an inclining swash plate and a piston, which is reciprocated by the swash plate. The stroke of the piston is changed in accordance with the inclination angle of the swash plate. The displacement of the compressor is changed between a minimum displacement and a maximum displacement in accordance with the stroke of the piston. The apparatus includes an actuator coupled to the swash plate. The actuator is actuated by exhaust pressure or intake pressure from the engine. A controller changes the inclination angle of the swash plate by actuating the actuator.

Abstract: A control apparatus that promptly increases the displacement of a compressor after the compressor is started while liquefied refrigerant is lingering in an external circuit. The control apparatus includes a restricting passage. The restricting passage is located in a first pressure introduction passage, through which the pressure of the first pressure monitoring point flows to the control valve. The restricting passage decreases the pressure of refrigerant that flows through the passage. When the compressor is started while liquefied refrigerant is lingering in the external circuit and the pressure of the first pressure monitoring point is abruptly increased, the restricting passage reduces the increase of the pressure that is detected by the control valve. Therefore, the displacement of the compressor is promptly increased.

Abstract: An air-conditioning apparatus having a refrigerant circuit including a condenser, a pressure reducing device, an evaporator, and a variable displacement compressor. The air-conditioning apparatus has a torque detecting device and an external information detecting device. The torque detecting device directly or indirectly detects the reaction torque acting on the compressor, and the external information detecting device detects various external information other than the torque. The air-conditioning apparatus further has a control device for determining a target torque in accordance with the external information provided by the external information detecting device. The control device executes a feedback control program for controlling the displacement of the compressor such that the torque detected by the torque detecting device approaches the target torque.

Abstract: According to the structure for damping the pulsations of discharge pressure of a compressor of the present invention, in the annular discharge chamber 28 divided on the outer circumferential side in the rear housing 5, two bulkhead sections 35 are extended from positions on both sides of the outlet 23 in the circumferential direction in such a manner that they are separate from each other. The end portion of each bulkhead section 35 is extended to halfway between the first discharge port section 20 and the second discharge port section 21. The flow path from the first discharge port section 20 to the outlet 23 is directed to the opposite side to the outlet 23 and then turned back to the outlet 23. Therefore, the length of the flow path from the first discharge port section 20 to the outlet 23 becomes relatively long.

Abstract: A compressor includes a cylinder block having a cylinder bore. A valve plate assembly is located between the cylinder block and a rear housing. The valve plate assembly includes a plurality of plates. The rear housing is connected with the cylinder block through the valve plate assembly. A pair of pins engage all the plates to determine the position of the valve plate assembly relative to at least one of the cylinder block and the rear housing.

Abstract: The object of the present invention is to offer a structure of a suction valve enough to prevent a noise or clatter caused by vibrations of a suction valve in a variable displacement compressor having pistons. The suction valve is a bendable flexible valve composed of flexible portions, and of a closing portion placed adjoining to the flexible portions to form a free end to close a suction port. The lengths of the flexible portions of the suction valve are nearly equal, but the widths of the flexible portions of the suction valve are different each other.

Abstract: A swash plate 20 made of an aluminum-based material is allowed to be inclined in the axial direction of a rotary shaft 18 and to rotate integrally with the rotary shaft 18 due to the engagement between guide holes 251 formed in the support arms 25 made of an iron-based material and heads 231 of to-be-guided pins 23 made of an iron-based material. The inclination of the swash plate 20 is guided based upon a slide guide relationship between the guide holes 251 and the to-be-guided pins 23 and upon a slide support action of the rotary shaft 18. The inclination-limiting protuberances 191 integrally formed on the rotary support member 19 made of the iron-based material come into contact with the to-be-guided pins 23. The swash plate 20 is inclined at a maximum angle in a state where the inclination-limiting protuberances 191 come into contact with the to-be-guided pins 23.

Abstract: A control valve used for a variable displacement compressor comprises a valve housing, a valve chamber defined in the valve housing, a valve body. The valve body is located in the valve chamber. A pressure sensing chamber is defined in the valve housing. A movable wall is located in the sensing chamber to divide a first pressure chamber and a second pressure chamber. The movable wall moves in accordance with the pressure difference between the first pressure chamber and the second pressure chamber. A rod transmits the movement of the movable wall to the valve body. The pressure directed in the vicinity of the end portion of the rod is the same type pressure directed in the first pressure chamber or in the second pressure chamber. An actuator determines the target pressure difference between the two pressure chambers. This permits the displacement of the compressor to be quickly changed.

Abstract: A variable displacement compressor includes a bleed passage for releasing gas from a crank chamber to a suction chamber and a supply passage for supplying gas from a discharge chamber to the crank chamber. A control valve includes an outlet valve mechanism located in the bleed passage and an inlet valve mechanism located in the supply passage. When the inlet valve mechanism is in the open state, the outlet valve mechanism is in the closed state. An outlet valve body of the outlet valve mechanism has a communication passage. When the outlet valve mechanism is in the closed state, the communication passage is opened to communicate the crank chamber with the suction chamber. Therefore, when the compressor is operating at the minimum displacement, a gas circuit is positively formed within the compressor, and atomized lubricant in refrigerant gas positively lubricates the moving parts of the compressor.

Abstract: Variable displacement compressor may include a swash plate inclinably coupled to a drive shaft. A piston may be disposed within a cylinder bore and an end portion of the piston may be connected to a peripheral edge of the swash plate by a shoe. The piston preferably reciprocates within the cylinder bore in order to compress a refrigerant in response to rotation of the inclined swash plate. The inclination angle of the swash plate can be changed to change the compressor output discharge capacity. A rotor is preferably coupled to the drive shaft so that the rotor rotates together with the rotating drive shaft. A hinge mechanism connects the swash plate with the rotor by means of a guide on a rotary disk of the rotor. The hinge mechanism transmits torque from the drive shaft to the swash plate regardless of the inclination angle of the swash plate.

Abstract: A piston includes an engaging portion for engaging with a piston drive mechanism for reciprocating the piston, a hollow head portion with an opening at its one end, and a disc-shaped end plate for closing the opening of the hollow head portion. The piston further includes a central axial protrusion extending in the axial direction. The protrusion is formed integrally with the hollow head portion. The end plate is connected to the central axial protrusion of the hollow head portion. The end plate also has a protrusion protruding towards the central axial protrusion of the hollow head. One of the protrusions has a fitting hole to which the other is press-fitted, thereby connecting the hollow head portion to the end plate to close the opening of the hollow head portion. A diameter of the disc-shaped end plate is smaller than an outer diameter of the cylindrical hollow head portion.

Abstract: The present invention discloses a method for installing pistons in cylinder bores formed in a cylinder block of a compressor. The piston on one end of the cylinder block and a positioning jig on the other end of the cylinder block are arranged. The positioning jig is inserted into the cylinder bore such that part of the positioning jig protrudes from the cylinder bores toward the piston. The protruding part of the positioning jig is engaged with the piston to determine the position of the piston. The piston is inserted into the cylinder bore while maintaining the engagement between the jig and the piston. The positioning jig is removed from the cylinder bore. This facilitate automation of installation of pistons in cylinder bores.