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公开(公告)号：US20160312678A1
公开(公告)日：2016-10-27
申请号：US15136427
申请日：2016-04-22
Applicant: Cummins Inc.
Inventor： Rohan A. Siddhanthi , Bryon D. Staebler , Krishna Kamasamudram
CPC classification number: F01N3/2066 , B01D53/9418 , B01D53/9431 , B01D53/9477 , B01D2251/2062 , B01D2255/20723 , B01D2255/20738 , B01D2255/20761 , B01D2255/50 , B01D2255/904 , B01D2255/911 , B01D2257/404 , B01D2258/012 , F01N3/021 , F01N13/0093 , F01N2240/40 , F01N2510/063 , F01N2610/02 , Y02C20/10 , Y02T10/24
Abstract: An exhaust aftertreatment system configured to reduce nitrous oxide (N2O) formation includes a first selective catalytic reduction (SCR) catalyst. The first SCR catalyst is configured for low N2O formation and low ammonia (NH3) storage capacity. A second SCR catalyst is positioned downstream of the first SCR catalyst. The second SCR catalyst is configured for high NH3 storage capacity.
Abstract translation: 构造成减少一氧化二氮（N2O）形成的排气后处理系统包括第一选择性催化还原（SCR）催化剂。 第一个SCR催化剂配置为低N2O形成和低氨（NH3）储存能力。 第二SCR催化剂位于第一SCR催化剂的下游。 第二SCR催化剂被配置为具有高的NH 3储存能力。
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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
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.
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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
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.
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公开(公告)号：US10113462B2
公开(公告)日：2018-10-30
申请号：US15136427
申请日：2016-04-22
Applicant: Cummins Inc.
Inventor： Rohan A. Siddhanthi , Bryon D. Staebler , Krishna Kamasamudram
Abstract: An exhaust aftertreatment system configured to reduce nitrous oxide (N2O) formation includes a first selective catalytic reduction (SCR) catalyst. The first SCR catalyst is configured for low N2O formation and low ammonia (NH3) storage capacity. A second SCR catalyst is positioned downstream of the first SCR catalyst. The second SCR catalyst is configured for high NH3 storage capacity.
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