Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Kabushiki Kaisha Toyota Jidoshokki

Akira Nakamoto

Shinichi Suzuki

Masakazu Obayashi

Naofumi Kimura

Toshiro Fujii

Hayato Ikeda

Hisato Kawamura

Kazuhiro Nomura

Kazuya Kimura

Hiroyuki Gennami

Satoshi Koumura

Masahiro Kawaguchi

Masaki Ota

Taku Adaniya

Naoya Yokomachi

Takahiro Suzuki

Satoshi Umemura

Jun Hasegawa

Noriyuki Shintoku

Akinobu Kanai

Takanori Okabe

Hideo Mori

Takeshi Kawata

Hiroshi Tanaka

Junichi Toyama

Hirouki Gennami

A compressor has a pulley for transmitting torque from an external drive source to a rotary shaft to drive a compression mechanism. The pulley has a pulley body. The compressor has a mass body located in a range that is radially inward of the outer circumference of the pulley. The mass body swings about an axis that is spaced from the rotation axis of the pulley body by a predetermined distance and is substantially parallel to the rotation axis of the pulley body.

Compressor and pulley for compressor

A mechanism for attenuating torsional vibration in a compressor is described. The compressor includes a swash plate secured to a drive shaft and pistons coupled to the swash plate. Compression of refrigerant gas by the pistons generates torsional vibrations of the drive shaft. The rear end of the drive shaft is coupled to a damper for attenuating torsional vibrations. The damper includes a frictional plate secured to the rear end of the drive shaft, a weight rotatably fitted about the drive shaft, and a coil spring. The coil spring elastically presses the weight against the frictional plate and elastically couples the weight with the drive shaft. When the drive shaft torsionally vibrates, the weight contacts the frictional plate and is vibrated about the axis of the drive shaft by the coil spring. As a result, energy of the torsional vibrations is consumed and the vibrations are attenuated. Further embodiments show similar dampers attached to the exterior of the compressor.

Torsional vibration attenuating structure in compressor

A compressor having a rotating member, which includes a drive shaft and a swash plate. A piston compresses gas and torsionally vibrates the rotating member. A damper is coupled to the shaft to reduce torsional vibrations of the rotating member. The natural frequency of the damper is substantially equal to that of the rotating member. The damper includes a metal pin coupled to the shaft, a weight coupled to the rotating member, and a rubberlike body arranged between the shaft and the weight. The pin functions as a spring acting in the direction of the torsional vibrations and has a spring constant that remains substantially the same within the operating temperature range of the compressor. The weight is vibrated torsionally with the rotating member by the pin to offset the torsional vibrations of the rotating member. The natural frequency of the damper is determined mainly by the mass of the weight and the spring constant of the pin. The rubberlike body absorbs the torsional vibrations of the rotating member and has a spring constant smaller than that of the pin such that the natural frequency of the damper is substantially unaffected by the rubberlike body.

Compressor

A compressor includes front and rear cylinder blocks, a drive shaft rotatably supported by the cylinder blocks, a swash plate mounted on the drive shaft, a plurality of cylinder bores defined in the cylinder blocks and located around the drive shaft, and a plurality of pistons respectively disposed in the cylinder bores. The pistons reciprocate by converting rotation of the drive shaft with the swash plate. A plurality of compression chambers are defined in the cylinder bores for compressing the gas supplied to the cylinder bores in accordance with the reciprocating movement of the pistons. Each compression chamber has dead volume defined by a space having a predetermined volume when the associated piston is at top dead center in each cylinder bore. A reference capacity is defined by the capacity when the piston is at a bottom dead center of the cylinder bore that has the smallest dead volume. The largest dead volume is greater than the minimum dead volume by approximately four percent of the reference capacity.

Multiple piston swash plate type of compressor including different dead

A compressor includes a drive shaft rotatably supported by a housing, a swash plate supported on the drive shaft, a plurality of cylinder bores defined in the housing, a plurality of pistons positioned in associated cylinder bores and a clutch. The clutch engaged and disengaged by a solenoid. A dynamic damper is positioned on the rear side of the drive shaft. The dynamic damper includes an elastic portion made of rubber and a mass portion made of metal. In another embodiment, the mass portion of the dynamic damper has a plurality of radially extending projections. In a further embodiment, the dynamic damper has a ring shape and is fixed to the armature of the clutch.

Vibration torsion system damper for a shaft of a compressor

A compressor that is constructed for reduced vibration during operation includes a cylinder having at least three cylinder bores, pistons being respectively positioned in the cylinder bores, structure for reciprocating the pistons; and structure for defining a dead volume between each of the pistons and cylinder bores. The dead volumes are divided into at least two groups, which include a large dead volume group and a small dead volume group, and wherein the large dead volume group includes at least two cylinder bores, whereby vibration is reduced during operation.

Piston-type compressor with reduced vibration

A compressor has a swash plate supported on a drive shaft for an integral rotation. The swash plate is coupled to a plurality of pistons reciprocally moveable in a cylinder block to compress gas therein. Reaction force of the compressed gas applied to the piston and causing axial load acting on the swash plate and the drive shaft is buffered by buffer structure. The buffer structure comprises a first bearing interposed between a first surface of the swash plate and the cylinder block. The buffer structure has a second bearing interposed between a second surface of the swash plate and the cylinder block. One of the bearings is arranged to be flexibly deformable to absorb the axial load while the other bearing is arranged to be rigid to receive the axial load and transmit the axial load to the cylinder block.

Swash plate type compressor with bearing assembly

The surface of a central section of a spiral element formed on a stationary or a movable scroll unit of a scroll type compressor is determined through the steps of locating an outer wall surface changing point G in a first polar coordinate system X, Y having a first origin O, drawing a circle Cs with its center at the first origin O and with a diameter corresponding to the orbital radius e of the orbiting motion of the movable scroll unit, locating a contact point P at a desired contact angle .beta. on the circle Cs, drawing a straight line m passing through the contact point P and the first origin O, drawing a straight line I passing the outer wall surface changing point G and inclined at a predetermined angle .alpha. to the X-axis, determining the intersection point C of the straight lines m and I, and determining a section of the contact curve in a second polar coordinate system having its second origin at the intersection point C by determining a smooth curve interconnecting the outer wall surface changing point G and the contact point P, and smoothly merging into an outer curve at the outer surface changing point G. The compression clearance formed between the scroll elements can be substantially reduced to zero at the final stage of a compression cycle so that the compression efficiency can be improved, the vibration and noise are reduced, and that the operation reliability can be improved.

Method of determining the shape of spiral elements for scroll type

A capacity control arrangement controlling the capacity of a variable capacity wobble plate type compressor of a car air-conditioner driven by an engine of the car employs an engine load sensor, a compressor discharge pressure sensor, a car speed sensor, a compressor crankcase chamber pressure sensor, a miscellaneous air-conditioning data sensor, and a central processing unit to calculate and adjust a duty ratio value at which a solenoid-operated capacity control valve of the compressor is electrically driven. The adjustment of the duty ratio is carried out in such a manner when the engine load exceeds a predetermined value, the solenoid-operated capacity control valve first takes a fully open position to establish the lowest compressor capacity for an adjusted short period of time, and subsequently, takes a reduced opening position to maintain the lowest compressor capacity for as long as the engine load exceeds the predetermined value.

Capacity control arrangement for a variable capacity wobble plate type

A variable wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for a refrigerant before compression, a discharge chamber for a compressed refrigerant, compressing cylinder bores, pistons reciprocated by the wobble plate within the cylinder bores for compressing the refrigerant, a crankcase having a chamber to receive therein a drive and a wobble plate mechanism connected to the pistons to cause the reciprocating motion of the pistons and capable of changing the wobble angle thereof, a first passageway closably opened so as to apply a high discharge gas pressure of the discharge chamber to the drive and wobble plate mechanism within the crankcase chamber, a solenoid-operated plunger valve for controlling an introduction of a high pressure refrigerant gas from the discharge chamber into a high pressure chamber arranged in a part of the first passageway in response to a change in a cooling load, and a second passageway providing a fluid communication between the crankcase chamber and the suction chamber, a spool valve urged by a spring toward a first position opening the second passageway to thereby permit evacuation of a high pressure gas from the crankcase chamber to the suction chamber while the solenoid-operated plunger valve stops the introduction of the high pressure refrigerant gas into the high pressure chamber of the first passageway, and moved toward a second position closing the second passageway in association with the operation of the solenoid valve for operating the first passageway and introducing the high pressure refrigerant into the high pressure chamber.

Variable displacement wobble plate type compressor with a solenoid

A method for controlling the displacement changing mechanism of a variable displacement wobble plate type compressor arranged in a car air-conditioning circuit is carried out in a manner such that, when the operating condition of the compressor is stable and when hunting of a controlled variable of the air-conditioner, i.e., hunting of a temperature at the outlet end of an evaporator of the air-conditioning circuit, occurs, a manipulated variable to be given to the displacement changing mechanism to cause a change in the controlled variable is reduced so that hunting of the controlled variable is suppressed and the controlled variable reaches a desired value.

Method for controlling a displacement changing mechanism of a variable

A method for controlling the compressor displacement of a variable displacement wobble plate type compressor having a solenoid-operated control valve unit for controlling the pressure level of a crankcase chamber of the compressor by controlling the duty ratio of an electric pulsive current to energize the solenoid-operated control valve unit, the frequency of the electric pulsive current being set and maintained at a low frequency, such as a frequency equal to or less than 1.0 Hz.

Method for controlling displacement of a variable displacement wobble

A variable wobble plate type compressor with a variable angle non-rotary wobble plate, having a suction chamber for a refrigerant before compression, a discharge chamber for a compressed refrigerant, compressing cylinder bores, pistons reciprocated by the wobble plate within the cylinder bores for compressing the refrigerant, a crankcase having a chamber to receive therein a drive and a wobble plate mechanism, connected to the pistons to cause the reciprocating motion of the pistons and capable of changing the wobble angle thereof, a first passageway closably opened so as to apply a high discharge gas pressure of the discharge chamber to the drive and wobble plate mechanism within the crankcase chamber, a solenoid valve for closing and opening the first passageway in response to a change in a cooling load, and a second passageway providing a fluid communication between the crankcase chamber and the suction chamber, a spool valve urged by a spring toward a first position opening the second passageway thereby permitting evacuation of a high pressure gas from the crankcase chamber to the suction chamber while the solenoid valve is closing the first passageway, and moved toward a second position closing the second passageway in association with the operation of the solenoid valve for opening the first passageway.

Growing community of inventors

Kariya, Japan

Akira Nakamoto