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Title:
IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINE, AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2019/102976
Kind Code:
A1
Abstract:
The present invention suitably detects a current conduction abnormality in a switch element of an ignition device for an internal combustion engine. This ignition device 1 for an internal combustion engine includes an ignition coil 11 and an ignition plug 2, wherein the ignition coil 11 includes: a primary coil 111 that is provided with a main primary coil 111a and a sub primary coil 111b; and a secondary coil 112 that generates a secondary current I2 in response to voltage changes in the primary coil 111. The ignition device 1 further includes: a main switch element 12 that allows or cuts off first-direction current conduction to the main primary coil 111a; a sub-primary-coil magnetic flux generation state switching unit 5 that can switch between a forward-direction magnetic flux generation state that allows first-direction current conduction to the sub primary coil 111b, and a reverse-direction magnetic flux generation state that allows second-direction current conduction to the sub primary coil 111b; and an abnormality detection unit that detects an abnormality in current conduction to the sub primary coil 111b. The abnormality detection unit is configured so as to detect a current conduction abnormality on the basis of the overlap between first-direction current conduction and second-direction current conduction to the sub primary coil 111b.

Inventors:
IWAKI Hidefumi (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
JP2018/042751
Publication Date:
May 31, 2019
Filing Date:
November 20, 2018
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
F02P3/055; F02P3/00; F02P15/10
Domestic Patent References:
WO2017183062A12017-10-26
WO2018083719A12018-05-11
Foreign References:
JP2015200284A2015-11-12
Attorney, Agent or Firm:
TODA Yuji (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
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