| 摘要 |
PROBLEM TO BE SOLVED: To materialize an ignition device for an internal combustion engine and an ion current detection device for the internal combustion engine which are of low cost, small sized, stable, and reliable, and does not deteriorate output performance of a spark plug. SOLUTION: In the ignition device for the internal combustion engine provided with a primary coil controlling primary current on and off by electronic control by a primary current shut off element and a secondary coil electromagnetically coupled to the primary coil and supplying high voltage to the spark plug, IGBT is used for the primary current shut off element. COPYRIGHT: (C)2007,JPO&INPIT
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