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System and method for controlling catalyst storage capacity

  • US 20040154286A1
  • Filed: 03/09/2004
  • Published: 08/12/2004
  • Est. Priority Date: 06/20/2001
  • Status: Active Grant
First Claim
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1. In an internal combustion engine coupled to an exhaust system having a catalyst, a method of adjusting an oxidant storage capacity of the catalyst, comprising:

  • estimating a current amount of oxidants stored in the catalyst;

    estimating an amount of oxidant storage available in the catalyst;

    comparing said estimated amount of oxidants stored in the catalyst to said estimated amount of oxidant storage available;

    adjusting an engine operating parameter in response to said comparison to affect a temperature of the catalyst.

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