(19)
(11) EP 0 263 495 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.06.1989 Bulletin 1989/26

(43) Date of publication A2:
13.04.1988 Bulletin 1988/15

(21) Application number: 87114594.2

(22) Date of filing: 06.10.1987
(51) International Patent Classification (IPC)4: F02M 7/12
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 06.10.1986 JP 153598/86

(71) Applicant: MIKUNI KOGYO KABUSHIKI KAISHA
Chiyoda-ku Tokyo (JP)

(72) Inventors:
  • Sekiya, Mitsuru
    Kuno 2480 Odawara-shi Kanagawa-ken (JP)
  • Muraji, Tetsuo
    Kuno 2480 Odawara-shi Kanagawa-ken (JP)

(74) Representative: Weitzel, Wolfgang, Dr.-Ing. Patentanwalt 
Friedenstrasse 10
89522 Heidenheim
89522 Heidenheim (DE)


(56) References cited: : 
   
       


    (54) Fuel supply device for carburetors


    (57) A fuel supply device for carburetors of the type which provides a branch passageway (17) communicating with a fuel passageway between a fuel metering jet (4) and a connection of a fuel passageway (6) with a negative pressure passageway (9) and a float chamber (5), places a diaphragm type enriched valve (32), in the middle of the branch passageway, controlled in accordance with the variation of the negative pressure generated on the downstream side of a solenoid valve or a throttle valve controlled by signals issued from various sensors detecting an operating condition of an engine and controls a fuel flow rate so that the level of a fuel column to be formed in the negative pressure passageway for intake flow rate detection communicating with the fuel passageway is kept constant, in order to enable a fuel supply to be positively performed with respect to any transient state of engine operation.







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