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Method and apparatus for determining a temperature of an emission catalyst

  • US 6,601,382 B2
  • Filed: 11/15/2001
  • Issued: 08/05/2003
  • Est. Priority Date: 11/15/2001
  • Status: Expired due to Fees
First Claim
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1. An article of manufacture for determining a catalyst temperature of an engine, the article of manufacture comprising:

  • a computer storage medium having a computer program encoded therein for determining a first exhaust flow rate and a second exhaust flow rate based on a total flow of said exhaust gases, determining a first temperature of exhaust gases associated with said first exhaust flow rate based on a steady state temperature and an amount of heat transferred from said exhaust gases associated with said first exhaust flow rate to an exhaust system;

    determining a second temperature of exhaust gases associated with said second exhaust flow rate based on said steady state temperature, and determining said catalyst temperature based on said first temperature and said second temperature.

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