Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Kabushiki Kaisha Toyota Jidoshokki

Other

Denso Corporation

Idemitsu Kosan Company, Limited

Eagle Industry Co., Ltd.

Ryo Matsubara

Masaki Ota

Ken Suitou

Taku Adaniya

Masahiro Kawaguchi

Kazuya Kimura

Satoshi Umemura

Tomoji Tarutani

Hirotaka Kurakake

Kenta Nishimura

Tetsuhiko Fukanuma

Masanori Sonobe

Hiroyuki Yoshida

Yuji Hashimoto

Hiroshi Kubo

Yoshikazu Fukutani

Masakazu Murase

Tatsuya Hirose

Noriyuki Shintoku

Kazuhiko Minami

Yoshio Kimoto

Hideharu Yamashita

Kazuhito Miyagawa

Kouji Watanabe

Yuki Yokoi

Naoki Nishimura

Toshiro Fujii

Takayuki Kato

Masato Kaneko

Keigo Shirafuji

Naoya Yokomachi

Hiroshi Fukasaku

Tatsuya Koide

Yasuharu Odachi

Kazuhiro Kuroki

Akinobu Kanai

Hiroyuki Nakaima

Kazuki Najima

Toshinori Kanzaki

Hideki Higashidozono

Fuminobu Enokijima

Michiyasu Nosaka

Seiji Katayama

Izuru Shimizu

Hirohito Hayashi

Yasutane Hijikata

Tomohiro Wakita

Kengo Sakakibara

Shigeo Fukushima

Shintaro Miura

Naoki Koeda

Shoichi Ieoka

So Nakajima

Mutsumi Yoshino

Shingo Kumazawa

Kitaru Iwata

Ai Saeki

Toru Onishi

Hiroyuki Nishinosono

Shinya Miura

Takahisa Ban

Yuki Morikage

Masatoshi Hiramatsu

Yasuhiro Tabe

Kenichi Kadoguchi

Norihisa Tamada

Masashi Nakamori

Nakahara Nobuo

The lubricating oil composition for a refrigerator of the present invention is used with a refrigerant containing carbon dioxide, and contains a base oil (A) containing a polyoxyalkylene glycol as a major component, and an alcohol (B) having at least one hydroxy group, in which a total number of the hydroxy group and an ether bond is from 2 to 3 (provided that the number of an ether bond may be 0).

Lubricating oil composition for refrigerator, composition for refrigerator, lubricating method, and refrigerator

A variable displacement type swash plate compressor includes a housing having therein a suction chamber, a discharge chamber, a control pressure chamber, a shaft hole, and cylinder bores. The compressor further has a drive shaft, a swash plate, an inclination angle changing mechanism, pistons, introduction passages, and a valve mechanism. The valve mechanism includes a valve element is disposed in a passage connecting the control pressure chamber and the suction chamber. The valve element is integrally rotatable with the drive shaft and axially movable by a pressure difference across the valve element. An opening of the residual gas bypass passage is changed by the axial movement of the valve element. The valve element selectively connects and disconnects the introduction passages with the residual gas bypass passage.

Variable displacement type swash plate compressor

An oil separation member has a partition member that partitions between a discharge chamber and a discharge passage. A circular ring portion is provided in the partition member in a manner extending toward the discharge passage. An introduction hole that communicates the discharge chamber and the discharge passage with each other is formed in the circular ring portion. The introduction hole extends in a tangential direction to the circular ring portion.

Compressor having oil separator

A swash plate type variable displacement compressor includes a collection and supply mechanism. The collection and supply mechanism has collection passages, supply passages, an annular space, an inlet port, and an outlet port. The inlet port is communicable with a working collection passage of the collection passages. The outlet port is communicable with a working supply passage of the supply passages. When the inclination angle of the swash plate is maximum, residual refrigerant gas in a compression chamber of collection phase is collected through the working collection passage and the collected refrigerant gas is supplied to a compression chamber of supply phase. On the other hand, when the inclination angle is less than the maximum, residual refrigerant gas is supplied no more into the supply-phase compression chamber.

Swash plate type variable displacement compressor

A displacement control valve includes an electromagnetic solenoid, a drive force transmitting body actuated, and a pressure sensitive portion having a pressure sensitive body that selectively extends and contracts in the movement direction of the drive force transmitting body in correspondence with pressure in a pressure sensitive chamber. A first valve body is arranged in the pressure sensitive body to adjust the cross-sectional area of an outlet passage. A second valve body is connected to the drive force transmitting body to adjust the cross-sectional area of a supply passage. The pressure sensitive body is movable in the movement direction of the drive force transmitting body in the pressure sensitive chamber. The pressure sensitive chamber is configured to communicate with the control pressure chamber. The pressure sensitive body is urged by the pressure in the control pressure chamber in the direction in which the first valve body closes.

Displacement control valve

A variable displacement type compressor has a supply passage for supplying refrigerant gas to a pressure control chamber, a release passage for releasing the refrigerant gas from the pressure control chamber, a first control valve for controlling the amount of the refrigerant gas flowing through the supply passage, a check valve provided between the first control valve and the pressure control chamber and preventing the refrigerant gas from flowing from the pressure control chamber to the first control valve by closing the supply passage and a second control valve for adjusting a cross-sectional area of the release passage from minimum to maximum. The second control valve has a back pressure chamber communicating with the supply passage, a valve chamber forming a part of the release passage and communicating with a suction-pressure region, a valve hole forming a part of the release passage and communicating with the valve chamber and a spool having a valve portion located in the valve chamber. When a pressure in the back pressure chamber increases, the valve portion decreases the degree of opening of the valve hole.

Variable displacement type compressor with displacement control mechanism

A variable displacement type compressor in which a discharge-pressure region, a suction-pressure region and a pressure control chamber are defined, has a tiltable swash plate and a piston reciprocated by the swash plate in the pressure control chamber. The inclination angle of the swash plate and the piston stroke are changed by adjustment of pressure in the pressure control chamber thereby to control the displacement of the compressor. The compressor further comprises a supply passage for supplying refrigerant gas from the discharge-pressure region to the pressure control chamber, a release passage for releasing the refrigerant gas from the pressure control chamber to the suction-pressure region, a first control valve for adjusting a cross-sectional area of the supply passage from the discharge-pressure region to the pressure control chamber and a second control valve for adjusting cross-sectional area of the release passage. The second control valve includes a valve body for opening and closing the release passage whose cross-sectional area is set minimum when the valve body is located at the closed position and a valve spring for urging the valve body in a direction to open the release passage. When the second control valve is closed, pressure in the supply passage downstream the first control valve acts on the valve body in a direction to close the release passage and pressure in the suction-pressure region acts on the valve body in a direction to open the release passage.

In a control system of a variable displacement compressor, a pressure sensing means mechanically detects at least one pressure in the refrigerant circuit. A varying means varies a reference value for positioning a valve body. A pressure detector electrically detects the pressure detected by the pressure sensing means in the refrigerant circuit and/or physical quantity which correlates with the detected pressure. A calculator calculates a maximum value of urging force applied to the valve body by the varying means toward an increasing side of the displacement of the compressor. The urging force applied to the valve body is controlled not to exceed the maximum value toward the increasing side of the displacement. The displacement of the compressor is maximized by the pressure sensing means under the pressure for calculating the maximum value when the varying means applies urging force of the maximum value to the valve body.

Control system for variable displacement compressor

A compressor torque estimate device is used for a variable displacement compressor whose displacement is variable based on a compressor control signal for estimating a compressor torque of the compressor. The compressor torque estimate device includes a torque calculator and a corrector. The torque calculator calculates a torque required for driving the compressor based on the compressor control signal, thereby obtaining a calculated torque. The corrector corrects the calculated torque by a procedure of first-order lag, thereby obtaining a corrected torque. The corrector also estimates the corrected torque to be the compressor torque.

Compressor torque estimate device, engine controller and method of estimating compressor torque

A control valve controls the displacement of a variable displacement compressor. The control valve includes a first valve body for adjusting the pressure in a crank chamber, a pressure sensing member, which is displaced in accordance with the pressure difference between two pressure points located in a refrigerant circuit to move the first valve body, an electromagnetic actuator for urging the pressure sensing member, and a second valve body, which is operably coupled to the pressure sensing member. The second valve body adjusts the opening degree of a discharge passage of the refrigerant circuit in accordance with the displacement of the pressure sensing member. Therefore, compared to a case where the first and second valve bodies are independently arranged in the compressor, the number of parts are reduced, which reduces the manufacturing cost.

Control valve of variable displacement compressor with pressure sensing member

A variable displacement type compressor circulates a refrigerant in an air conditioning circuit. The compressor has a compression mechanism and a displacement controller. The compression mechanism compresses and discharges the refrigerant. The displacement controller controls the discharge amount of the refrigerant of the compressor. The displacement controller further includes a normal control means and a protective control means. The normal control means controls the displacement based on a cooling load. The protective control means controls the displacement based on the value in connection with the rotational speed of the compressor and the actual operating information of the compressor.

Variable displacement type compressor, air conditioner with the variable displacement type compressor, and method for controlling displacement in the variable displacement type compressor

A first bleed passage and a second bleed passage each connect a crank chamber of a compressor with a suction chamber of the compressor. A first supply passage and a second supply passage each connect the crank chamber with a discharge chamber of the compressor. A first control valve adjusts the opening size of the first supply passage in response to the pressure in the suction chamber. A second control valve includes a ball valve and an electromagnetic actuator. The ball valve adjusts the opening size of the second supply passage and the opening size of the first bleed passage. The electromagnetic actuator moves the ball valve. The ball valve is moved to a first position and to a second position. At the first position, the ball valve closes the second supply passage and opens the first bleed passage. At the second position, the ball valve opens the second supply passage and closes the first bleed passage. A displacement control device, which includes the first and second control valves, readily and reliably changes the displacement of the compressor.

Displacement control device for variable displacement compressor

A control valve includes an accommodation cylinder, a coil, a stator, a plunger, and a valve body. Electromagnetic force is generated between the stator and the plunger and the plunger moves relative to the stator. The valve body adjusts the opening degree of a valve hole. A flat surface and a peripheral wall are formed in an end of the stator. The peripheral wall has a tapered cross-section with an inclined inner surface. The inclined inner surface and the flat surface define a recess. The plunger has a frustum portion. The frustum portion includes a flat distal surface and an annular inclined surface. The taper angle of the peripheral wall is equal to or less than twenty degrees. The diameter of the flat distal surface of the frustum portion is equal to or greater than eighty percent of the largest diameter of the annular inclined surface.

Control valve for variable displacement compressor

A control valve has a valve housing and a valve chamber defined in the valve housing. A valve body is accommodated in the valve chamber for adjusting the opening degree of a supply passage. A pressure sensing chamber is defined in the valve housing. The pressure at a pressure monitoring point in a refrigerant circuit is applied to the pressure sensing chamber. A bellows is located in the pressure sensing chamber. The bellows has a movable end. A transmission rod is slidably supported by the valve housing. The transmission rod includes the valve body. A support spring is located between the inner wall of the pressure sensing chamber and the movable end of the bellows. The spring supports the movable end such that the movable end can be displaced. The movable end of the bellows includes a protrusion such that the spring and the movable end of the bellows are fitted to each other.

Control valve for variable displacement type compressor

Variable displacement compressors ( ) include a displacement control valve ( ) that is in communication with a drive chamber ( ). The output displacement of the compressor varies in response to changes in pressure within the drive chamber. A controller ( ) may control the displacement control valve so that the pressure within the drive chamber is maintained within a predetermined range. Further, the predetermined range may be determined based upon one or more factors that cause fluctuations in the pressure within the drive chamber during operation of the compressor.

Variable displacement compressors and methods for controlling the same

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Kariya, Japan

Ryo Matsubara