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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/229883
Kind Code:
Provided is an internal combustion engine ignition device that is capable of maintaining stable combustion by ensuring a stable high current period through stable supplying of necessary and sufficient discharge energy without deteriorating fuel efficiency. An internal combustion engine ignition device 1 for causing an ignition plug 2 to discharge electricity has an ignition coil 11 formed of a main primary coil 111a that generates a forward magnetic flux when current is passed therethrough, a sub-primary coil 111b that generates a reverse superimposed magnetic flux when current is passed therethrough, and a secondary coil 112 on which the magnetic fluxes of the main primary coil 111a and the sub-primary coil 111b are applied. Thus, an excess/shortage of discharge energy is prevented and stable combustion of an internal combustion engine is efficiently maintained through a feedback control so as to bring an actually measured value of a superimposed current I1b or an actually measured value of a secondary current I2 close to a target value during superimposed discharge control for increasing the discharge energy of the secondary coil 112, by supplying power to the sub-primary coil 111b to generate a superimposed magnetic flux after current to the main primary coil 111b is cut off.

UCHISE Yoshifumi (1-26, Miyakodoori 2-chome, Nada-ku, Kobe-sh, Hyogo 44, 〒6570844, JP)
Application Number:
Publication Date:
December 20, 2018
Filing Date:
June 14, 2017
Export Citation:
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HITACHI AUTOMOTIVE SYSTEMS HANSHIN, LTD. (1-26, Miyakodoori 2-chome Nada-ku, Kobe-sh, Hyogo 44, 〒6570844, JP)
International Classes:
F02P3/00; F02P15/10
Domestic Patent References:
Foreign References:
Attorney, Agent or Firm:
FUKUDA Shinichi et al. (Kashiwaya Bldg. 6-13, Nishishinbashi 1-chome Minato-ku Tokyo, 03, 〒1050003, JP)
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