公开(公告)号：US20240077009A1

公开(公告)日：2024-03-07

申请号：US18493645

申请日：2023-10-24

申请人： Cummins Inc.

发明人： Michael J. Cunningham ,  Neal W. Currier ,  Saurabh Yashwant Joshi ,  Antonius Padua Nusawardhana ,  Aleksey Yezerets

IPC分类号： F01N3/20 ,  F01N9/00

CPC分类号： F01N3/208 ,  F01N3/2006 ,  F01N9/005 ,  F01N3/101 ,  F01N2560/026 ,  F01N2570/14 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/1402 ,  F01N2900/1818

摘要： A system includes a controller for an exhaust aftertreatment system including a SCR catalyst in exhaust gas-receiving communication with an engine and at least one reductant dosing system structured to provide reductant to the exhaust gas. The controller is structured to determine a ratio of NO to NO2 at or proximate an inlet of the SCR catalyst. The controller is further structured to command the at least one reductant dosing system to increase, decrease, or maintain an amount of reductant provided to the exhaust gas based on comparing the ratio of NO to NO2 to a previous NO to NO2 ratio.

公开(公告)号：US11828218B2

公开(公告)日：2023-11-28

申请号：US17592770

申请日：2022-02-04

申请人： Cummins Inc.

发明人： Michael J. Cunningham ,  Neal W. Currier ,  Saurabh Yashwant Joshi ,  Antonius Padua Nusawardhana ,  Aleksey Yezerets

IPC分类号： F01N3/20 ,  F01N9/00 ,  F01N3/10 ,  F01N3/08 ,  F01N3/025 ,  F01N3/023 ,  F01N3/022

CPC分类号： F01N3/208 ,  F01N3/2006 ,  F01N9/005 ,  F01N3/022 ,  F01N3/023 ,  F01N3/0253 ,  F01N3/0821 ,  F01N3/101 ,  F01N9/002 ,  F01N2250/02 ,  F01N2330/06 ,  F01N2370/24 ,  F01N2510/068 ,  F01N2510/0682 ,  F01N2560/026 ,  F01N2570/14 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/1402 ,  F01N2900/1818

摘要： Systems, apparatuses, and methods include a controller for an exhaust aftertreatment system including a SCR catalyst in exhaust gas-receiving communication with an engine and at least one reductant dosing system structured to provide reductant to the exhaust gas. The controller is structured to determine a concentration of one or more of NO and NO2 at or proximate an inlet of the exhaust aftertreatment system and based on a dynamic model of the SCR catalyst, information indicative of a concentration of NOx at or proximate an outlet of the exhaust aftertreatment system, and information indicative of an amount of stored reductant in the SCR catalyst. The controller is further structured to command the at least one reductant doser to increase, decrease, or maintain an amount of reductant provided to the exhaust gas based on the determined concentration of one or more of NO and NO2 in the exhaust gas.

公开(公告)号：US20220154615A1

公开(公告)日：2022-05-19

申请号：US17592770

申请日：2022-02-04

申请人： Cummins Inc.

发明人： Michael J. Cunningham ,  Neal W. Currier ,  Saurabh Yashwant Joshi ,  Antonius Padua Nusawardhana ,  Aleksey Yezerets

IPC分类号： F01N3/20 ,  F01N9/00

摘要： Systems, apparatuses, and methods include a controller for an exhaust aftertreatment system including a SCR catalyst in exhaust gas-receiving communication with an engine and at least one reductant dosing system structured to provide reductant to the exhaust gas. The controller is structured to determine a concentration of one or more of NO and NO2 at or proximate an inlet of the exhaust aftertreatment system and based on a dynamic model of the SCR catalyst, information indicative of a concentration of NOx at or proximate an outlet of the exhaust aftertreatment system, and information indicative of an amount of stored reductant in the SCR catalyst. The controller is further structured to command the at least one reductant doser to increase, decrease, or maintain an amount of reductant provided to the exhaust gas based on the determined concentration of one or more of NO and NO2 in the exhaust gas.