(19)
(11) EP 0 404 357 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.03.1991 Bulletin 1991/11

(43) Date of publication A2:
27.12.1990 Bulletin 1990/52

(21) Application number: 90305660.4

(22) Date of filing: 24.05.1990
(51) International Patent Classification (IPC)5: F02M 51/08, F02M 61/08, F02M 67/12
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 21.06.1989 US 369509

(71) Applicant: GENERAL MOTORS CORPORATION
Detroit Michigan 48202 (US)

(72) Inventors:
  • De Nagel, Stephen Francis
    Warren, Michigan 48093 (US)
  • Pawlak, Andrzej Marian
    Troy, Michigan 48098 (US)
  • Klomp, Edward Daniel
    Mount Clemens, Michigan 48043 (US)

(74) Representative: Denton, Michael John et al
Patent Section 1st Floor Gideon House 28 Chapel Street
Luton Bedfordshire LU1 2SE
Luton Bedfordshire LU1 2SE (GB)


(56) References cited: : 
   
       


    (54) Injector


    (57) A solenoid-actuated valve assembly (10) has first and second valve members (18,24), first and second valve seats (26,28), a solenoid coil (40), a first permanent magnet armature (32) effective, when the coil (40) is energized with a positive current, to permit displacement of the first valve member (18) from the first valve seat (28); and a second permanent magnet armature (44) effective, when the coil (40) is energized with a negative current, to displace the second valve member (24) from the second valve seat (26). The first armature (32) is further effective, when the coil (40) is energized with a negative current, to bias the first valve member (18) into engagement with the first valve seat (28), and said second armature (44) is further effective, when the coil (40) is energized with a positive current, to bias the second valve member (24) into engagement with the second valve seat (26).







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