(19)
(11) EP 0 384 436 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.04.1991 Bulletin 1991/16

(43) Date of publication A2:
29.08.1990 Bulletin 1990/35

(21) Application number: 90103350.6

(22) Date of filing: 21.02.1990
(51) International Patent Classification (IPC)5: F02P 17/00
(84) Designated Contracting States:
DE ES FR GB SE

(30) Priority: 22.02.1989 JP 42152/89
31.03.1989 JP 82090/89
27.10.1989 JP 281500/89

(71) Applicant: NIPPONDENSO CO., LTD.
Kariya-shi Aichi-ken (JP)

(72) Inventor:
  • Toyama, Koichi
    Kariya-shi (JP)

(74) Representative: Pellmann, Hans-Bernd, Dipl.-Ing. et al
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4
80336 München
80336 München (DE)


(56) References cited: : 
   
       


    (54) Ignition detecting device of ignition apparatus


    (57) An ignition detecting device for use in an ignition apparatus of an internal combustion engine comprises ignition surge current detector means (10a) for detecting an ignition surge current generated in a primary circuit of an ignition coil (3) due to capacitive discharge of the ignition coil (3), and comparator means (10b) for comparing an output voltage of the ignition surge current detector means (10a) with a predetermined reference voltage (Vref) to detect the generation of the ignition surge current in excess of a predetermined value, thereby making it possible to detect accurately occurrence or nonoccurrence of ignition spark.







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