(19)
(11) EP 0 703 363 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.12.1996 Bulletin 1996/51

(43) Date of publication A2:
27.03.1996 Bulletin 1996/13

(21) Application number: 95306276.7

(22) Date of filing: 07.09.1995
(51) International Patent Classification (IPC)6: F02M 65/00
(84) Designated Contracting States:
DE GB

(30) Priority: 21.09.1994 JP 251599/94

(71) Applicant: ZEXEL CORPORATION
Tokyo (JP)

(72) Inventors:
  • Sawaki, Toshiki, c/o Higashimatsuyama Fact. of
    Higashimatsuyama-shi, Saitama-ken (JP)
  • Unozawa, Akira, c/o Higashimatsuyama Fact. of
    Higashimatsuyama-shi, Saitama-ken (JP)
  • Kasukawa, Kazuhisa, c/o Higashimatsuyama Fact. of
    Higashimatsuyama-shi, Saitama-ken (JP)

(74) Representative: Votier, Sidney David et al
CARPMAELS & RANSFORD 43, Bloomsbury Square
London WC1A 2RA
London WC1A 2RA (GB)

   


(54) Fuel injection device


(57) A fuel injection device comprises a body (10), a needle valve (21) axially slidably received in the body, a nozzle spring (22) for biasing the needle valve (21) toward a valve seat (18), and a detection assembly for detecting a time point for lifting the needle valve, that is, a fuel injection time. The detection assembly and the nozzle spring are received in a spring receiving hole (15). The detection assembly has an earth plate (31), a piezoelectric device (32) and an electrode plate (33) arranged in order toward the valve seat. A conical receiving surface (15a) is formed on an upper end of the spring receiving hole (15). The earth plate has an abutment surface (31a) which can be brought into surface contact with the receiving surface.






Search report