Title:
SCR CATALYST AMMONIA SURFACE COVERAGE ESTIMATION AND CONTROL
Document Type and Number:
WIPO Patent Application WO/2011/139631
Kind Code:
A3
Abstract:
Described herein are various embodiments of an apparatus, a system, and a method for reducing NOx emissions using ammonia storage on an SCR catalyst (164). For example, according to one embodiment, an apparatus for controlling an SCR system (160) of an internal combustion engine system (100) includes an ammonia storage module (210) and a reductant dosing module (220). The ammonia storage module determines an ammonia storage surface coverage (350) on an SCR catalyst of the SCR system and an ammonia compensation value (240) based on one of an excess ammonia flow rate (330) entering the SCR catalyst and an excess NOx flow rate (335) entering the SCR catalyst. The reductant dosing module generates a reductant dosing command (250) based on the ammonia compensation value.
Inventors:
OFOLI ABDUL R (US)
MOHAMMAD HASAN (NL)
MOHAMMAD HASAN (NL)
Application Number:
PCT/US2011/033767
Publication Date:
April 05, 2012
Filing Date:
April 25, 2011
Export Citation:
Assignee:
CUMMINS FILTRATION IP INC (US)
OFOLI ABDUL R (US)
MOHAMMAD HASAN (NL)
OFOLI ABDUL R (US)
MOHAMMAD HASAN (NL)
International Classes:
B01D53/94; B01D53/26; B01D53/56; F01N3/20
Foreign References:
| US20090272101A1 | 2009-11-05 | |||
| US20040098968A1 | 2004-05-27 | |||
| KR20100061145A | 2010-06-07 | |||
| US7213395B2 | 2007-05-08 |
Other References:
See also references of EP 2563500A4
Attorney, Agent or Firm:
MASSEY, Bryan J. et al. (Suite 600Salt Lake City, Utah, US)
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