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System for diagnosing reagent solution quality and emissions catalyst degradation

  • US 20050287034A1
  • Filed: 06/24/2004
  • Published: 12/29/2005
  • Est. Priority Date: 06/24/2004
  • Status: Active Grant
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1. A system for determining a reagent solution quality indicator, comprising:

  • a reagent solution source for supplying the reagent solution to an emissions catalyst configured to receive a NOx-containing gas therethrough, means for determining a NOx flow rate corresponding to a flow rate of NOx reduced from the gas by the emissions catalyst, means for determining a reagent solution flow rate corresponding to a flow rate of the reagent solution into the emissions catalyst, and a control circuit determining the reagent solution quality indicator as a function of the NOx flow rate and the reagent solution flow rate.

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