Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Reexamination Certificate
2006-02-07
2006-02-07
Denion, Thomas (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
C060S274000, C060S276000, C060S301000, C060S303000
Reexamination Certificate
active
06993900
ABSTRACT:
A method is presented for estimating an amount of ammonia stored in a urea-based SCR catalyst based on a dynamic model of the catalyst. The model takes into account chemical and physical properties of the catalyst, such as catalyst volume, the number of available ammonia storage cites, adsorption and desorption dynamics, as well as poisoning, thermal aging, and different catalyst operating temperatures, and generates the estimate based on a measured or estimated amount of NOx in an exhaust gas mixture upstream of the catalyst, an amount of reductant injected into the catalyst to facilitate NOx reduction, and on a measured value of NOx in an exhaust gas mixture downstream of the catalyst. The estimated ammonia storage amount is then used to control the amount of reductant injected into the catalyst to maintain desired ammonia storage amount such that maximum NOx conversion efficiency coupled with minimum ammonia slip are achieved.
REFERENCES:
patent: 5628186 (1997-05-01), Schmelz
patent: 5643536 (1997-07-01), Schmelz
patent: 5665318 (1997-09-01), Rembold et al.
patent: 5771689 (1998-06-01), Bareis et al.
patent: 5809775 (1998-09-01), Tarabulski et al.
patent: 5849593 (1998-12-01), Schmelz
patent: 5893267 (1999-04-01), Vogtlin et al.
patent: 5924280 (1999-07-01), Tarabulski
patent: 5992141 (1999-11-01), Berriman et al.
patent: 6003305 (1999-12-01), Martin et al.
patent: 6004524 (1999-12-01), Morsbach et al.
patent: 6017503 (2000-01-01), Kato et al.
patent: 6038854 (2000-03-01), Penetrante et al.
patent: 6066303 (2000-05-01), Sudduth et al.
patent: 6125629 (2000-10-01), Patchett
patent: 6171566 (2001-01-01), Ku et al.
patent: 6182443 (2001-02-01), Jarvis et al.
patent: 6182444 (2001-02-01), Fulton et al.
patent: 6192675 (2001-02-01), Hirota et al.
patent: 6209315 (2001-04-01), Weigl
patent: 6221324 (2001-04-01), Coq et al.
patent: 6266955 (2001-07-01), Liang et al.
patent: 6269633 (2001-08-01), van Nieuwstadt et al.
patent: 6294141 (2001-09-01), Twigg et al.
patent: 6299847 (2001-10-01), Allen
patent: 6305160 (2001-10-01), Hammerle et al.
patent: 6311480 (2001-11-01), Suzuki et al.
patent: 6314722 (2001-11-01), Matros et al.
patent: 6383463 (2002-05-01), Mochida et al.
patent: 6427439 (2002-08-01), Xu et al.
patent: 6499294 (2002-12-01), Katoh et al.
patent: 6581374 (2003-06-01), Patchett et al.
patent: 6737033 (2004-05-01), Hofmann et al.
patent: 2002/0182127 (2002-12-01), Braun et al.
patent: WO 99/39809 (1999-08-01), None
IMECE-2002-DSC-32104, “Modeling of a Urea SCR Catalyst with Automotive Applications”, Devesh Upadhyay, Michiel Van Nieuwstadt, pp. 1-7Proceedings of ASME:IMECE, Nov.-17, 2002, New Orleans.
IMECE-2002-DSC-32103, “Control Design of an Automotive Urea SCR Catalyst”, Devesh Upadhyay, Michiel Van Nieuwstadt, pp. 1-8, Proceedings of ASME: IMECE, Nov.-17, 2002, New Orleans.
Upadhyay Devesh
van Nieuwstadt Michiel J.
Alterman Hall McCoy Russell & Tuttle LLP
Denion Thomas
Ford Global Technologies LLC
Lippa Allan J.
Tran Diem
LandOfFree
Exhaust gas aftertreatment systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Exhaust gas aftertreatment systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust gas aftertreatment systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3654651