(19)
(11) EP 0 796 993 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.09.1999 Bulletin 1999/35

(43) Date of publication A2:
24.09.1997 Bulletin 1997/39

(21) Application number: 97104865.7

(22) Date of filing: 21.03.1997
(51) International Patent Classification (IPC)6: F02P 3/02, H01F 38/12
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 21.03.1996 JP 64092/96
23.04.1996 JP 100764/96

(71) Applicants:
  • HITACHI, LTD.
    Chiyoda-ku, Tokyo 101 (JP)
  • Hitachi Car Engineering Co., Ltd.
    Hitachinaka-shi, Ibaraki-ken 312 (JP)

(72) Inventors:
  • Kondo, Eiichiro
    Hitachinaka-shi, Ibaraki 312 (JP)
  • Sugiura, Noboru
    Mito-shi, Ibaraki 310 (JP)
  • Anzo, Yoichi
    Hitachinaka-shi, Ibaraki 312 (JP)
  • Watanabe, Hiroshi
    Takahagi-shi, Ibaraki 318 (JP)
  • Shimada, Junichi
    Mito-shi, Ibaraki 311-11 (JP)
  • Kobayashi, Kazutoshi
    Hitachinaka-shi, Ibaraki 312 (JP)

(74) Representative: Beetz & Partner Patentanwälte 
Steinsdorfstrasse 10
80538 München
80538 München (DE)

   


(54) Ignition apparatus for use in internal combustion engine


(57) An ignition apparatus is received in a plug hole (43a) which is formed by a cylinder head (41a) and a cylinder head cover (42a) of an internal combustion engine. A side core (18) has a slit between two horizontally extending side wall ends. The side core (18) comprises one selected from a laminated sheet structure comprised of two grain oriented silicon steel sheets, each having a slit between two horizontally extending side wall ends, and the plural slits align at a substantially same position. The slit prevents an one-turn short of a magnetic flux of the side core (18), thereby a predetermined secondary voltage more than an engine requirement secondary voltage is obtained. An ignitor reception portion comprises an independent and individual ignitor reception portion and an independent and individual coil reception portion, and the ignitor reception portion and the coil reception portion are combined.






Search report