公开(公告)号：US11421572B2

公开(公告)日：2022-08-23

申请号：US17128474

申请日：2020-12-21

Applicant: Cummins Inc.

Inventor： Rohan A. Siddhanthi ,  Neal W. Wallace ,  Michael Haas ,  Michael J. Ruth ,  Krishna Pradeep Chilumukuru ,  Shirish S. Punde

IPC: F01N3/02 ,  F01N3/10 ,  F01N3/20 ,  B01D53/94 ,  F01N3/28 ,  F01N3/021 ,  F01N3/32

Abstract: An exhaust gas aftertreatment system for an internal combustion engine includes an inlet conduit, a reductant decomposition chamber, a first selective catalytic reduction (SCR) catalyst member, a second SCR catalyst member, a mixing chamber, a particulate filter, a reductant delivery system, and a hydrocarbon delivery system. The inlet conduit is configured to receive exhaust gas from the internal combustion engine. The reductant decomposition chamber is fluidly coupled to the inlet conduit and configured to receive the exhaust gas from the inlet conduit. The first SCR catalyst member is fluidly coupled to the reductant decomposition chamber and configured to receive the exhaust gas from the reductant decomposition chamber. The second SCR catalyst member is fluidly coupled to the first SCR catalyst member and is configured to receive the exhaust gas from the first SCR catalyst member.

公开(公告)号：US20210215079A1

公开(公告)日：2021-07-15

申请号：US17128474

申请日：2020-12-21

Applicant: Cummins Inc.

Inventor： Rohan A. Siddhanthi ,  Neal W. Wallace ,  Michael Haas ,  Michael J. Ruth ,  Krishna Pradeep Chilumukuru ,  Shirish S. Punde

IPC: F01N3/20 ,  F01N3/28 ,  F01N3/021 ,  F01N3/32 ,  F01N3/10 ,  B01D53/94

Abstract: An exhaust gas aftertreatment system for an internal combustion engine includes an inlet conduit, a reductant decomposition chamber, a first selective catalytic reduction (SCR) catalyst member, a second SCR catalyst member, a mixing chamber, a particulate filter, a reductant delivery system, and a hydrocarbon delivery system. The inlet conduit is configured to receive exhaust gas from the internal combustion engine. The reductant decomposition chamber is fluidly coupled to the inlet conduit and configured to receive the exhaust gas from the inlet conduit. The first SCR catalyst member is fluidly coupled to the reductant decomposition chamber and configured to receive the exhaust gas from the reductant decomposition chamber. The second SCR catalyst member is fluidly coupled to the first SCR catalyst member and is configured to receive the exhaust gas from the first SCR catalyst member.

公开(公告)号：US20250092810A1

公开(公告)日：2025-03-20

申请号：US18959166

申请日：2024-11-25

Applicant: CUMMINS INC.

Inventor： Dylan Scott Trandal ,  Krishna Kamasamudram ,  Rayomand Dabhoiwala ,  Shirish S. Punde

IPC: F01N3/20 ,  F01N3/28

Abstract: An aftertreatment system includes a dosing module. The aftertreatment system includes a selective catalytic reduction unit disposed fluidly downstream of the dosing module. The aftertreatment system includes a conduit fluidly connecting the dosing module to the selective catalytic reduction unit. The conduit has a coating disposed on a surface thereof. The coating is exposed to exhaust passing through the conduit and to the selective catalytic reduction unit. The coating is configured to capture and deactivate platinum passing through the conduit.