US 12,241,394 B2
Dual leg aftertreatment system
Ankit Sakuja, Charleston, SC (US); Travis Alva Anderson, Columbus, IN (US); and Srinivas Chakravarthy Bathula, Columbus, IN (US)
Assigned to Cummins Power Generation Inc., Minneapolis, MN (US)
Appl. No. 18/283,984
Filed by Cummins Power Generation Inc., Minneapolis, MN (US)
PCT Filed Mar. 24, 2022, PCT No. PCT/US2022/021804
§ 371(c)(1), (2) Date Sep. 25, 2023,
PCT Pub. No. WO2022/204437, PCT Pub. Date Sep. 29, 2022.
Claims priority of provisional application 63/166,448, filed on Mar. 26, 2021.
Prior Publication US 2024/0159180 A1, May 16, 2024
Int. Cl. F01N 11/00 (2006.01); F01N 3/08 (2006.01); F01N 3/20 (2006.01)
CPC F01N 11/00 (2013.01) [F01N 3/0842 (2013.01); F01N 3/2053 (2013.01); F01N 2250/12 (2013.01); F01N 2410/02 (2013.01); F01N 2410/12 (2013.01); F01N 2510/02 (2013.01); F01N 2550/10 (2013.01); F01N 2560/026 (2013.01); F01N 2900/04 (2013.01); F01N 2900/0416 (2013.01); F01N 2900/0418 (2013.01); F01N 2900/0422 (2013.01); F01N 2900/1621 (2013.01); F01N 2900/1622 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of controlling an aftertreatment system, comprising:
receiving, by a controller, a plurality of emissions values from a plurality of sensors disposed in the aftertreatment system;
determining, by the controller, a real-time conversion efficiency for each of a first leg and a second leg of the aftertreatment system based on the plurality of emissions values;
determining, by the controller, a real-time conversion metric for the aftertreatment system based on the real-time conversion efficiency for the first leg and the second leg;
comparing, by the controller, the real-time conversion metric to an upper threshold value; and
initiating, by the controller, a cleaning operation to clean the aftertreatment system based on a determination that the real-time conversion metric satisfies the upper threshold value.
 
13. A control system for an aftertreatment system, comprising:
an engine outlet nitrogen oxide (NOx) sensor;
a first system outlet NOx sensor configured to be disposed in a first leg of the aftertreatment system;
a second system outlet NOx sensor configured to be disposed in a second leg of the aftertreatment system;
a cleaning system configured to clean at least one leg of the aftertreatment system; and
a controller communicably coupled to the engine outlet NOx sensor, the first system outlet NOx sensor, the second system outlet NOx sensor, and the cleaning system, the controller configured to:
determine a first real-time conversion efficiency for the first leg based on data received from the engine outlet NOx sensor and the first system outlet NOx sensor;
determine a second real-time conversion efficiency for the second leg based on data received from the engine outlet NOx sensor and the second system outlet NOx sensor;
determine a real-time conversion metric for the aftertreatment system based on the first real-time conversion efficiency and the second real-time conversion efficiency; and
control the cleaning system to initiate a cleaning operation to clean the aftertreatment system in response to the real-time conversion metric satisfying an upper threshold value.