Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Kabushiki Kaisha Toyota Jidoshokki

Kabushiki Kaisha Toyoda Jidosokki

Masaru Hamasaki

Masaki Ota

Hisakazu Kobayashi

Youichi Okadome

Masayoshi Hori

Satoshi Koumura

Yasunori Makino

Tetsuhiko Fukanuma

Shigeyuki Hidaka

Kazushige Murao

Hiroyuki Nagai

Masato Yoneda

A seal cap is formed of an elastically deformable material and includes a cap portion that closes a passage port, a grip portion that can be grasped, and a joining portion which integrally joins the cap portion and the grip portion. The joining portion has a bolt insertion portion through which a stud bolt can be inserted. The grip portion is formed on a side of the bolt insertion portion that corresponds to the cap portion. The joining portion is formed between the bolt insertion portion and the cap portion and is provided with a cut which communicates with the bolt insertion portion. The cut allows the cap portion to be bent and deformed by the contact between the cap portion and the stud bolt during pulling out of the seal cap from a connection portion.

Seal cap

A variable displacement compressor compresses gas supplied from an evaporator of an external refrigerant circuit and discharges the compressed gas to the refrigerant circuit. A check valve is located between the compressor suction chamber and the evaporator. The check valve prevents gas flow from the suction chamber to the evaporator. When the compressor is stopped, a displacement control valve increases the pressure in a crank chamber of the compressor to move a swash plate to a minimum inclination position. The pressure in the suction chamber is increased by gas supplied from the crank chamber. Closing the check valve accelerates a pressure increase in the suction chamber. When the pressure in the suction chamber is increased, the control valve limits a further pressure increase in the crank chamber. As a result, the force that decreases the inclination of the swash plate is limited.

Device and method for controlling displacement of variable displacement compressor

A variable capacity single-headed piston type refrigerant compressor provided with an aluminum-made cam plate rotating with an axial drive shaft to cause reciprocation of a plurality of single-headed pistons within respective cylinder bores, the cam plate further axially moving in parallel with the drive shaft to adjustably change its angle of inclination with respect to a reference plane perpendicular to the axis of rotation of the drive shaft to thereby adjustably vary the capacity of the compressor, the cam plate being further provided with a weight made of iron system material and generating a centrifugal force on the cam plate during the rotation of the cam plate to thereby produce a moment M2 counteracting an unfavorable moment M1 acting on the cam plate due to the high-speed reciprocation of the pistons.

Variable capacity refrigerant compressor with an aluminum cam plate means

A variable displacement compressor includes a simplified hinge mechanism located between a rotary support and a swash plate. The hinge mechanism includes a swing arm extending from the swash plate and a pair of support arms extending from the rotary support such that the swing arm is placed between the support arms. A guide pin is attached to the swing arm. The guide pin has end portions engaging with guide holes of the support arms. Washers are located between the swing arm and the support arms to prevent the swing arm from directly contacting the support arms.

Variable displacement compressor

A variable type compressor has a housing that houses a crank chamber and rotatably supports a drive shaft. Part of the housing is constituted by a cylinder block. Cylinder bores extend through the housing about the drive shaft. A piston is accommodated in each cylinder bore. A discharge chamber is defined in the housing and connected to the crank chamber by a pressurizing passage. An inclinable cam plate is supported on the drive shaft. The reciprocation of each piston draws refrigerant gas into the associated cylinder bore from a suction chamber and discharges the refrigerant gas into the discharge chamber through a discharge port. The displacement and the discharge of refrigerant gas is controlled by altering the inclination of the cam plate. A collection compartment is provided to receive the refrigerant gas discharged from the cylinder bores. Oil is separated from the refrigerant gas in the collection compartment. The inlet of the pressurizing passage is connected with the collection compartment to supply the separated oil to the crank chamber.

A compressor having an oil separator at a shell portion of a housing of the compressor. The oil separator is constructed by a front part 61 integral to a front housing 11 and a rear part 62 integral to a cylinder block 12. The oil separator has an oil separation chamber 1 formed between the front and the rear parts 61 and 62. The oil separator is formed integrally with oil separating passageway forming plates 67 and 68 which partially divide the separation chamber 63 to create a serpentine shaped passageway 66 which extends from an inlet 64a to an outlet 65 of the separation chamber. The passageway 66 is in communication with the crank chamber 15 via a oil return passageway 69 at a location adjacent its outlet.

Swash-plate compressor having a capacity control valve on the oil return

A variable capacity swash-plate-type refrigerant compressor incorporating therein single-headed pistons reciprocating in the cylinder bores to compress refrigerant gas, a drive shaft rotatably supported and driven by an external drive source, a swash-plate element mounted around the drive shaft and rotated by the drive shaft so that the rotation of the swash-plate element causing the reciprocation of the single-headed pistons, and a hinge mechanism arranged between the drive shaft and the swash-plate element to permit the swash-plate element to change its angle of inclination with respect to the axis of rotation of the drive shaft to thereby adjustably change the delivery capacity of the compressor, the swash-plate element being constituted by a swash-plate-body member made of an aluminum alloy material and functioning as a sliding contact member cooperating with the single-headed pistons via shoes, and a guide-bracket member made of an iron based material and functioning as a hinge mechanism forming member. The swash-plate-body member and the guide-bracket member are connected together by press-fitting and prevented, by a rotation-preventing unit, from being relatively rotated against one another.

Variable capacity swash-plate-type refrigerant compressor

Variable displacement compressor having a muffler and a capacity control

A variable displacement compressor used in air conditioners is provided with a tilting swash plate to vary its displacement. A drive shaft extends through a boss of the swash plate. A hole is defined in the boss by a pair of intersecting conical walls. The position of the swash plate is restricted by the contact between the walls of the hole and the drive shaft. The walls of the hole also allow the swash plate to incline without interference. A bearing element is arranged at a central angled section defined in the walls of the hole. The bearing element is located at a position that is opposite from a hinge mechanism with respect to the drive shaft. A concave seat is provided in the boss at this position to receive the bearing element. The bearing element includes a cylindrical surface engaging the outer surface of the drive shaft.

Compressor with bearing between the drive shaft and the swash-plate boss

A variable-capacity swash-plate operated single-headed piston type compressor including a crank chamber having a capacity large enough for receiving a drive shaft, a rotor, a swash plate and shoes engaging between the swash plate and single headed pistons and provided with an open mouth for directly receiving a refrigerant gas returning from an external refrigerating system, a suction passageway for providing a fluid communication between the crank chamber and a suction chamber from which the refrigerant gas is sucked into respective cylinder bores so as to be compressed by the single headed pistons, and a capacity control valve provided with a bellows element for adjustably changing the cross sectional area of the suction passageway in response to a change in a pressure prevailing in the suction passageway.

Variable capacity refrigerant compressor

A swash plate is mounted on a drive shaft in a crank chamber. The swash plate rotates integrally with the drive shaft and changes its inclination angle based on the pressure in the crank chamber. Pistons are provided in cylinder bores and coupled to the swash plate. The rotation of the swash plate is converted into reciprocation of each piston in the associated cylinder bore. The pistons'reciprocation draws the gas from a suction chamber into the compression chamber. The gas is compressed and discharged into the discharge chamber. A lug plate that integrally rotates with the drive shaft is mounted on the drive shaft. The lug plate has a receptacle. The receptacle has a pair of side walls that are spaced apart. The swash plate has an arm extending perpendicular to the swash plate. The arm has a distal end surface extending perpendicular to the axis of the drive shaft. The head slides along the receptacle and receives a load from the swash plate.

A reciprocating piston type compressor for compressing refrigerant gas for an automobile air conditioning system is provided with a cylinder block assembly which includes a plurality of cylinder bores, a swash plate chamber and an oiler channel which extends along the one of the end walls of the swash plate chamber. When the refrigerant gas, which flows rotationally in the swash plate chamber due the rotating swash plate, contacts the oiler channel, the lubricating oil mist, in the refrigerant gas flow in the swash plate chamber induced by the rotation of the swash plate, is separated from the refrigerant gas and the separated lubricating oil is introduced into the bearing means by the oiler channel.

Reciprocating piston variable displacement type compressor improved to

A variable displacement type compressor having a rotary shaft, a swash plate with a through hole into which the rotary shaft is inserted for inclining movement of the swash plate, a lug plate mounted on the rotary shaft, a hinge mechanism between the lug plate and the swash plate for guiding the inclining movement of the swash plate. The displacement of the compressor varies by adjusting the inclined angle of the swash plate. The swash plate is connected through the hinge mechanism to the rotary shaft on two points and directly contacts the rotary shaft at a single contact point located on the inner periphery of the through hole.

Swash plate type variable displacement compressor

A variable displacement compressor that varies its displacement by altering the inclination of a swash plate. A drive shaft is supported rotatably within a housing. A rotor is fixed to the drive shaft. A swash plate is mounted on the drive shaft and adapted to slide and incline with respect to the shaft. A hinge mechanism operably connects the swash plate to the rotor. A plurality of pistons, each accommodated in one of the bores and coupled to the swash plate, are reciprocated in the bore by the rotation of the swash plate. The hinge mechanism includes a guide pin that projects from the swash plate and includes a joint. A support arm projects from the rotor. The support arm includes a receptacle which accommodates the joint and extends toward the drive shaft. A bushing is accommodated within the receptacle and slides along a wall of the receptacle. The bushing is provided with an interior space to accommodate the joint. The interior space allows the joint to pivot therein when the inclination of the swash plate is altered. The bushing is provided with a slit to permit the interior space to be temporarily enlarged when attaching the bushing to the joint.

Growing community of inventors

Kariya, Japan

Masaru Hamasaki