Ion current detecting apparatus for internal combustion engine
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United States of America Patent
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Jun 29, 2010
Grant Date -
Feb 7, 2008
app pub date -
Aug 9, 2005
filing date -
Aug 9, 2004
priority date (Note) -
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Abstract
falls below the predetermined value becomes longer than time duration in which the ion current generated by fuel combustion in the engine combustion chamber lasts. The ion current detecting apparatus automatically detects degradation in an insulation resistance in the spark plug, ensuring normal operation in engine control.
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