US 12,241,398 B2
Aftertreatment system NOx and ammonia control strategy
Michael Haas, Columbus, IN (US); Adam W. Kidd, Indianapolis, IN (US); Oxford Peng, Columbus, IN (US); Shahidur M. Rahman, Columbus, IN (US); Ananth Vemuri, Columbus, IN (US); Christophe Tricaud, Columbus, IN (US); and Easwar Yarrabikki, Columbus, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Appl. No. 18/268,054
Filed by Cummins Inc., Columbus, IN (US)
PCT Filed Dec. 17, 2021, PCT No. PCT/US2021/064023
§ 371(c)(1), (2) Date Jun. 16, 2023,
PCT Pub. No. WO2022/133206, PCT Pub. Date Jun. 23, 2022.
Claims priority of provisional application 63/199,307, filed on Dec. 18, 2020.
Prior Publication US 2024/0052766 A1, Feb. 15, 2024
Int. Cl. F01N 3/20 (2006.01); F01N 3/10 (2006.01); F01N 9/00 (2006.01); F01N 11/00 (2006.01); F01N 13/00 (2010.01)
CPC F01N 3/208 (2013.01) [F01N 3/108 (2013.01); F01N 3/2066 (2013.01); F01N 9/005 (2013.01); F01N 13/0093 (2014.06); F01N 9/007 (2013.01); F01N 11/002 (2013.01); F01N 11/007 (2013.01); F01N 2610/02 (2013.01); F01N 2900/04 (2013.01); F01N 2900/0402 (2013.01); F01N 2900/0406 (2013.01); F01N 2900/0412 (2013.01); F01N 2900/0418 (2013.01); F01N 2900/0601 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system comprising:
an aftertreatment system; and
a controller coupled to the aftertreatment system, the controller configured to:
generate a spatially resolved model of a catalyst of the aftertreatment system, the spatially resolved model dividing the catalyst into one or more portions; and
adjust the spatially resolved model based on one or more sensed values from at least one sensor upstream of the one or more portions and at least one sensor downstream of the one or more portions, wherein the catalyst is a first Selective Catalytic Reduction (SCR) catalyst, and wherein the aftertreatment system includes a second SCR catalyst positioned upstream of the first SCR catalyst.
 
12. A method comprising:
generating, by a controller coupled to an aftertreatment system, a spatially resolved model of a catalyst of the aftertreatment system, the spatially resolved model dividing the catalyst into one or more portions; and
adjusting, by the controller, the spatially resolved model based on one or more sensed values from at least one sensor upstream of the one or more portions and at least one sensor downstream of the one or more portions, wherein the catalyst is a first Selective Catalytic Reduction (SCR) catalyst, and wherein the aftertreatment system includes a second SCR catalyst positioned upstream of the first SCR catalyst.