Hitachi, Ltd.

Hitachi Automotive Engineering Co., Ltd.

Toshio Sudo

Yukio Takahashi

Isao Hayase

Masaru Ito

Kunihiko Takao

Takashi Yokoyama

Kenji Tojo

Atsuo Kishi

Yasushi Muramoto

Masao Mizukami

Kenichi Kawashima

Atsushi Suginuma

Kosaku Sayo

Toshikazu Ito

Akira Tezuka

Hideo Usui

Kenji Emi

Kiyosi Yamamoto

Masahiro Moritaka

A variable displacement swash plate type compressor is suitable for use as a refrigerant compressor for automobile air conditioner. The compressor includes pistons, an oscillating member for driving the piston, a rotating member for oscillating the oscillating member, a plate member for imparting a rotational force to the rotating member, and a main shaft connected to the plate member. A member, having a spherical or cylindrical surface portion and a flat surface portion, is provided between the rotating member and the plate member in such a manner that it is slidably in contact with both of the rotating member and the plate member. Also, movement of the oscillating member is defined by contact of the oscillating member with a stationary member. Consequently, it is possible to provide a variable displacement swash plate type compressor which assures reliable capacity control at a high-speed rotation and which vibrates and wears less. Furthermore, it is possible to prevent application of a thrust load to the drive shaft.

Variable displacement compressor

A variable-displacement compressor includes a wobble member for driving a pistons, and a rotation member for wobbling the wobbling member, a first support portion for supporting a wobbling member in such a manner that the angle of wobbling of the wobbling member is variable, and a second support portion for supporting said rotation member in such a manner that the angle of tilt of said rotation member relative to a main shaft is variable. With this construction, unbalanced inertia forces can be reduced greatly, thereby providing the variable-displacement compressor which produces less vibrations and noises.

Balanced variable-displacement compressor

A variable displacement compressor comprises a housing forming a crank chamber, a shaft, expansible chambers including pistons, a swash plate connected to the shaft so as to be smoothly changeable in inclination against the shaft and driven to rotate, a wobble plate rotatable on the swash plate, a rotation preventing mechanism including a shoe member slidable in an axial direction, and a pressure control valve which is provided in a refrigerant passage from a suction port of the compressor to the expansible chamber to control the pressure of refrigerant to be sucked responsive to the suction pressure and both to the suction pressure and to the discharge pressure when the discharge pressure is high. The refrigerant passage has a sharply bent portion for separating lubrication oil from a refrigerant flowing therein and communicates with the crank chamber to discharge blow-by gas therefrom.

Variable displacement wobble plate compressor with capacity control valve

In a swash plate type compressor, a partition plate member is located in a high pressure chamber of the compressor housing and divides the high pressure chamber into a plurality of small rooms which are communicated in series through a hole formed on the partition member. Each small room in the high pressure chamber and the partition member hole serves to reduce the resonant sound among the noise in a car or the like where the compressor is utilized.

Swash plate type compressor

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Katsuta, Japan

Toshio Sudo