Global Patent Index - EP 1033489 A2

EP 1033489 A2 2000-09-06 - Displacement control valve for variable displacement type compressors

Title (en)

Displacement control valve for variable displacement type compressors

Title (de)

Kontrollventil für variable Verdrängungskompressoren

Title (fr)

Soupape de contrôle pour compresseurs à capacité variable


EP 1033489 A2 (EN)


EP 00104150 A


JP 5249499 A

Abstract (en)

A control valve for a variable displacement type compressor includes a movable body (43) supported by the housing (38) such that the movable body (43) moves in the housing (38). The movable body (43) includes a first valve hole (46) that forms part of a bleed passage (30). A first valve body (41) adjusts the opening of the first valve hole (46). The first valve body (41) abuts against the movable body (43) such that the first valve hole (46) is closed. A second valve hole (49) extends in the housing (38) and forms part of a supply passage (31). A second valve body (48) adjusts the opening of the second valve hole (49). The second valve body (48) is movable integrally with the movable body (43). When the movable body (43) is located at an initial position, the second valve body (48) closes the second valve hole (49). However, when the first valve body (41) separates the movable body (43) from the initial position while abutting against the movable body (43), the second valve body (48) is moved to open the second valve hole (49). In this control valve, the first valve hole (46) and the second valve hole (49) are never open at the same time. Furthermore, the control valve controls the compressor displacement with high accuracy and an responsiveness. <IMAGE>

IPC 1-7 (main, further and additional classification)

F04B 27/18

IPC 8 full level (invention and additional information)

F04B 49/00 (2006.01); F04B 27/14 (2006.01); F04B 27/18 (2006.01)

CPC (invention and additional information)

F04B 27/1804 (2013.01); F04B 2027/1813 (2013.01); F04B 2027/1827 (2013.01); F04B 2027/1831 (2013.01); F04B 2027/1854 (2013.01); F04B 2027/1859 (2013.01)

Citation (applicant)

JP H0599136 A 19930420 - SANDEN CORP

Designated contracting state (EPC)


DOCDB simple family

EP 1033489 A2 20000906; EP 1033489 A3 20010110; JP 2000249050 A 20000912; JP 3750397 B2 20060301