US 12,448,912 B2
Systems and methods for multi-factor diagnosis of exhaust aftertreatment system components
Jiyin Peng, Beijing (CN); Ying Y. Yang, Beijing (CN); Xiao X. Wang, Beijing (CN); and Ye Yuan, Beijing (CN)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on Apr. 13, 2023, as Appl. No. 18/134,398.
Claims priority of application No. 202210399826.4 (CN), filed on Apr. 15, 2022.
Prior Publication US 2023/0332531 A1, Oct. 19, 2023
Int. Cl. F01N 11/00 (2006.01); F01N 3/021 (2006.01); F01N 9/00 (2006.01)
CPC F01N 11/002 (2013.01) [F01N 3/021 (2013.01); F01N 9/002 (2013.01); F01N 2560/08 (2013.01); F01N 2900/1406 (2013.01); F01N 2900/16 (2013.01); F01N 2900/1606 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
an aftertreatment system in exhaust gas receiving communication with an engine, the aftertreatment system comprising a diesel particulate filter (DPF);
at least one sensor coupled to the DPF; and
a controller configured to:
receive sensor data from the at least one sensor, the sensor data comprising a pressure change and a flow rate;
determine, based on the sensor data, a flow resistance of the DPF and a pressure change value;
determine that the flow resistance is less than a flow resistance threshold;
determine whether the pressure change value is less than a pressure change value threshold responsive to determining that the flow resistance is less than the flow resistance threshold;
trigger a first failure warning based on determining that the flow resistance is less than the flow resistance threshold and that the pressure change value is less than the pressure change value threshold, wherein triggering the first failure warning comprises providing a first notification via an operator input/output device; and
trigger a second failure warning based on determining that that the flow resistance is less than the flow resistance threshold and that the pressure change value is greater than the pressure change value threshold, wherein triggering the second failure warning comprises providing a second notification via the operator input/output device.