APPARATUS, SYSTEM, AND METHOD FOR ESTIMATING AN NOX CONVERSION EFFICIENCY OF A SELECTIVE CATALYTIC REDUCTION CATALYST

WIPO Patent Application WO/2010/065963

A3

According to one embodiment, an apparatus for estimating an NOx conversion efficiency of an SCR catalyst includes a catalyst degradation module (304) for determining an SCR catalyst degradation factor and a NOx concentration module (308) for determining an SCR catalyst inlet NOx concentration (307) based on an interpretation of at least one NOx detector signal (310). Additionally, the apparatus includes an NH3 concentration module (320) for determining an SCR catalyst inlet NH3 concentration (323), a temperature module (316) for determining an SCR catalyst bed temperature (317), and a space velocity (SV) module (312) for determining an exhaust gas SV (313) for the SCR catalyst. A NOx conversion efficiency module (324) calculates a NOx conversion efficiency value (302) based at least partially on the SCR catalyst degradation factor, the SCR catalyst inlet NOx concentration, the SCR catalyst inlet NH3 concentration, the exhaust gas SV, and the SCR catalyst bed temperature.

GARIMELLA PHANINDRA (US)
OSBURN ANDY (US)
CHI JOHN N (US)
WILLS JOAN M (US)

PCT/US2009/067020

October 14, 2010

December 07, 2009

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CUMMINS IP INC (US)
GARIMELLA PHANINDRA (US)
OSBURN ANDY (US)
CHI JOHN N (US)
WILLS JOAN M (US)

F01N11/00; B01D53/56; B01D53/94; F01N3/20; F01N9/00; G01M15/10

US20080066455A1	2008-03-20
US20040112046A1	2004-06-17
US20080250778A1	2008-10-16
US20060130458A1	2006-06-22

KUNZLER, Brian, C et al. (Suite 600Salt Lake City, Utah, US)

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