(19)
(11) EP 1 033 490 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.01.2001 Bulletin 2001/02

(43) Date of publication A2:
06.09.2000 Bulletin 2000/36

(21) Application number: 00104151.6

(22) Date of filing: 29.02.2000
(51) International Patent Classification (IPC)7: F04B 27/18
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 01.03.1999 JP 5249599

(71) Applicant: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
Aichi-ken (JP)

(72) Inventors:
  • Ota, Masaki
    Kariya-shi, Aichi-ken (JP)
  • Suitou, Ken
    Kariya-shi, Aichi-ken (JP)
  • Matsubara, Ryo
    Kariya-shi, Aichi-ken (JP)
  • Kurakake, Hirotaka
    Kariya-shi, Aichi-ken (JP)
  • Adaniya, Taku
    Kariya-shi, Aichi-ken (JP)

(74) Representative: Pellmann, Hans-Bernd, Dipl.-Ing. et al
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4-6
80336 München
80336 München (DE)

   


(54) Control valve for variable displacement compressor


(57) A displacement control valve for controlling the amount of gas flowing through a bleed passage (27A, 27B) of a compressor to adjust pressure in a crank chamber (5) of the compressor. The control valve includes a housing (60), a pressure sensitive member, or diaphragm (57), which is arranged in the housing (60), and an actuator (54) extending from the diaphragm (57) and arranged in the housing (60). A valve body (51) is formed integrally with the distal end of the actuator (54). A pressure receiving body (53) is provided at the proximal end of the actuator (54). The diaphragm (57) drives the actuator (54) in accordance with a suction pressure. The pressure receiving body (53) urges the diaphragm (57) in a single direction in accordance with a discharge pressure. The diameter (or cross-sectional are) of the actuator (54) decreases in a stepped-like manner in the axial direction. This simplifies manufacture and of the actuator (54) and facilitates assembly.






Search report