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Method of detecting cylinder ID using in-cylinder ionization for spark detection following partial coil charging

  • US 7,055,372 B2
  • Filed: 06/11/2003
  • Issued: 06/06/2006
  • Est. Priority Date: 11/01/2002
  • Status: Active Grant
First Claim
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1. A method of determining cylinder ID using an ionization signal, comprising the steps of:

  • partially charging at least one coil only up to a predetermined level, said predetermined lever being below a fully charged level at which normal firing events occur;

    observing at least one ionization signal; and

    determining whether a spark has occurred in at least one cylinder, wherein cylinder ID is determined based on said step of determining whether a spark has occurred in said at least one cylinder.

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