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Engine ready signal using peak engine cylinder pressure detection

  • US 6,542,798 B2
  • Filed: 12/06/2000
  • Issued: 04/01/2003
  • Est. Priority Date: 12/06/2000
  • Status: Expired due to Term
First Claim
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1. A method of determining whether an internal combustion engine is on, comprising:

  • calibrating a controller with a threshold ion current/breakdown value;

    measuring peak engine cylinder pressure by measuring an ion current/breakdown voltage across a spark plug of the engine, and sending an ion current/breakdown signal to the controller; and

    comparing the ion current/breakdown signal to the threshold ion current/breakdown value by the controller to determine if engine combustion is occurring.

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