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System and method of controlling engine dilution rate using combustion stability measurer derived from the ionization signal

  • US 7,213,573 B2
  • Filed: 01/28/2005
  • Issued: 05/08/2007
  • Est. Priority Date: 11/01/2002
  • Status: Expired due to Fees
First Claim
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1. A method for controlling exhaust gas recirculation comprising:

  • sensing an ionization signal;

    integrating said ionization signal to determine an ion integration value;

    determining an integration duration, said integration duration comprising a crank angle at which an integral of said ionization signal obtains a specified percentage of said ion integration value;

    comparing said integration duration to an optimized integration duration limit; and

    controlling an exhaust gas recirculation rate such that said integration duration does not exceed said optimized integration duration limit.

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