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FLEXIBLE FUEL TOLERANT CATALYTIC CONVERTER DIAGNOSTIC METHOD

  • US 20080115486A1
  • Filed: 11/20/2006
  • Published: 05/22/2008
  • Est. Priority Date: 11/20/2006
  • Status: Active Grant
First Claim
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1. A monitoring system for a catalytic converter, comprising:

  • a fuel determination module that determines a fuel composition based on fuel in a fuel system;

    a fuel/air (F/A) determination module that selectively determines a stoichioemetric F/A ratio based on the fuel composition; and

    an oxygen storage capacity (OSC) diagnostic module that computes a target OSC based on the stoichiometric F/A ratio, that compares the target OSC to a reference value, and diagnosis the catalytic converter based on the comparison.

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