(19)
(11) EP 0 301 620 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.02.1990 Bulletin 1990/06

(43) Date of publication A2:
01.02.1989 Bulletin 1989/05

(21) Application number: 88201411.1

(22) Date of filing: 06.07.1988
(51) International Patent Classification (IPC)4: F02M 51/06
(84) Designated Contracting States:
DE FR GB

(30) Priority: 27.07.1987 IT 2145087

(71) Applicant: WEBER S.r.l.
I-10125 Torino (IT)

(72) Inventors:
  • De Concini, Roberto
    I-40069 Zola Predosa Bologna (IT)
  • Ramacciotti, Luciano
    I-57100 Livorno (IT)

(74) Representative: De Carli, Erberto et al
ING. BARZANO & ZANARDO MILANO S.p.A. Via Borgonuovo, 10
20121 Milano
20121 Milano (IT)


(56) References cited: : 
   
       


    (54) Electromagnetically controlled fuel injector for feeding fuel to internal combustion engines


    (57) The electroinjector is equipped with a central magnetic core (10) from which a guide tube (19) protrudes, which acts as a guide for an anchor (12) of ferromagnetic material, which bears the injector shutter (17). In a form of practical embodiment, the anchor (12), in its opening movement, comes to stop against a shoulder element (24) made from an amagnetic material fastened on the core (10) in such a protruding position, as to define an air gap (T) and prevent the core (10) and the anchor (12) from magnetically sticking to each other. The shoulder element (24) is provided with a fastening cylindrical portion (30), and an adjacent portion (31) with a prevailingly radial development, which acts as the stop portion. The element, which can also be fastened onto the anchor (10), can be obtained from a rolled sheet or by drawing a thin tube.







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