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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
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.
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公开(公告)号：US10100689B2
公开(公告)日：2018-10-16
申请号：US15076213
申请日：2016-03-21
Applicant: Cummins Inc.
Inventor： Prachetas A. Kale , Timothy P. Lutz , Junhui Li , Ashok Kumar , Krishna Kamasamudram , C. Larry Bruner
IPC: B01D53/94 , F01N13/00 , F01N3/08 , F01N3/10 , F01N3/20 , F02D41/00 , F02D41/02 , F02D41/40 , F01N9/00 , F02D19/06
Abstract: A system and method are disclosed for desulfating an oxidation catalyst in an aftertreatment system of a multifuel internal combustion engine. The oxidation catalyst can be desulfated in response to one or more desulfation triggering events. The desulfation process includes providing hydrocarbons from one or all of the multiple fuel sources to an upstream oxidation catalyst. The hydrocarbons react with the exhaust gas within the upstream oxidation catalyst to deplete oxygen in the exhaust flow to thereby reduce the desulfation temperature of the oxidation catalyst while elevating a temperature of the exhaust gas to a desulfation temperature range.
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公开(公告)号：US20140237996A1
公开(公告)日：2014-08-28
申请号：US14189462
申请日：2014-02-25
Applicant: Cummins Inc.
Inventor： Aleksey Yezerets , Krishna Kamasamudram , Neal W. Currier , Ashok Kumar , Michael A. Smith
CPC classification number: F02D41/0235 , B01J38/04 , B01J38/06 , B01J38/08 , B01J38/56 , F01N3/0885 , F01N3/106 , F01N3/2033 , F01N3/2066 , F01N3/208 , F01N11/00 , F01N2550/02 , F01N2610/02 , F01N2610/03 , F01N2610/146 , F01N2900/1404 , Y02T10/24
Abstract: System, apparatus, and methods are disclosed for treating a reduction catalyst that has been exposed to an amount of sulfur. The treating of the reduction catalyst includes providing a fluid stream at a position upstream of the reduction catalyst. The fluid stream includes a temperature and a reductant amount, and the reductant amount includes an amount of urea, ammonia, or hydrocarbons.
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公开(公告)号：US09850796B2
公开(公告)日：2017-12-26
申请号：US15216913
申请日：2016-07-22
Applicant: Cummins, Inc.
Inventor： Andrew W. Osburn , Mark N. Bays , Krishna Kamasamudram , Aleksey Yezerets
IPC: F01N3/00 , F01N3/02 , F01N3/10 , F01N3/20 , F01N3/18 , F01N11/00 , F01N3/035 , F01N13/00 , B01D53/94 , G01M15/10
CPC classification number: F01N3/2006 , B01D53/9477 , B01D53/9495 , B01D2251/20 , B01D2255/904 , B01D2255/915 , F01N3/035 , F01N3/10 , F01N3/103 , F01N3/106 , F01N3/18 , F01N3/2066 , F01N3/208 , F01N11/00 , F01N11/002 , F01N13/009 , F01N2550/02 , F01N2550/05 , F01N2610/02 , F01N2610/1493 , F01N2900/1602 , F01N2900/1621 , G01M15/102 , Y02T10/24 , Y02T10/47
Abstract: An apparatus includes a dosing module structured to suspend dosing in an exhaust aftertreatment system; a selective catalytic reduction (SCR) inlet NOx module structured to interpret SCR inlet NOx data and an SCR inlet temperature; a SCR outlet NOx module structured to interpret SCR outlet NOx data; and a system diagnostic module structured to determine an efficiency of a SCR system based on the SCR inlet and outlet NOx data over a range of SCR temperatures, wherein the system diagnostic module is further structured to determine a state of at least one of a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and the SCR system based on the SCR efficiency at an elevated SCR temperature range and the SCR efficiency at a relatively lower SCR temperature range relative to a high SCR efficiency threshold and a low SCR efficiency threshold.
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5.发明申请公开(公告)号：US20170122175A1
公开(公告)日：2017-05-04
申请号：US15407819
申请日：2017-01-17
Applicant: Cummins Inc.
Inventor： Ashko Kumar , Krishna Kamasamudram , Jinyong Luo
IPC: F01N3/28 , B01J35/04 , B01J35/00 , B01J29/076 , F01N3/10 , B01J23/22 , F01N3/035 , F01N13/00 , F01N3/20 , B01D53/94 , B01J29/072
CPC classification number: F01N3/2803 , B01D53/9418 , B01D53/9477 , B01D2255/20723 , B01D2255/20738 , B01D2255/20761 , B01D2255/50 , B01D2255/9032 , B01D2255/904 , B01D2255/911 , B01D2255/9155 , B01D2258/012 , B01J23/22 , B01J29/072 , B01J29/076 , B01J35/0006 , F01N3/035 , F01N3/106 , F01N3/2066 , F01N13/009 , F01N13/0097 , F01N2370/04 , F01N2510/063 , F01N2510/0682 , F01N2610/02 , Y02T10/24
Abstract: Unique SCR catalyst including multiple washcoat formulations with differing performance characteristics are disclosed. One exemplary embodiment is an apparatus including a catalyst substrate defining a plurality of flow channels leading from an inlet to an outlet, a first washcoat composition distributed over a first portion of the flow channels, and a second washcoat composition distributed over a second portion of the flow channels. The first washcoat composition has a lower ammonia storage density than the second washcoat composition.
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Patent Agency Ranking
6.发明申请SYSTEM AND METHOD OF ISOLATING COMPONENT FAILURES IN AN EXHAUST AFTERTREATMENT SYSTEM 有权在排气系统中分离组件故障的系统和方法公开(公告)号：US20160326928A1
公开(公告)日：2016-11-10
申请号：US15216913
申请日：2016-07-22
Applicant: Cummins, Inc.
Inventor： Andrew W. Osburn , Mark N. Bays , Krishna Kamasamudram , Aleksey Yezerets
CPC classification number: F01N3/2006 , B01D53/9477 , B01D53/9495 , B01D2251/20 , B01D2255/904 , B01D2255/915 , F01N3/035 , F01N3/10 , F01N3/103 , F01N3/106 , F01N3/18 , F01N3/2066 , F01N3/208 , F01N11/00 , F01N11/002 , F01N13/009 , F01N2550/02 , F01N2550/05 , F01N2610/02 , F01N2610/1493 , F01N2900/1602 , F01N2900/1621 , G01M15/102 , Y02T10/24 , Y02T10/47
Abstract: An apparatus includes a dosing module structured to suspend dosing in an exhaust aftertreatment system; a selective catalytic reduction (SCR) inlet NOx module structured to interpret SCR inlet NOx data and an SCR inlet temperature; a SCR outlet NOx module structured to interpret SCR outlet NOx data; and a system diagnostic module structured to determine an efficiency of a SCR system based on the SCR inlet and outlet NOx data over a range of SCR temperatures, wherein the system diagnostic module is further structured to determine a state of at least one of a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF), and the SCR system based on the SCR efficiency at an elevated SCR temperature range and the SCR efficiency at a relatively lower SCR temperature range relative to a high SCR efficiency threshold and a low SCR efficiency threshold.
Abstract translation: 一种装置包括：配置模块，其被配置为在排气后处理系统中暂停配量; 构造成用于解释SCR入口NOx数据和SCR入口温度的选择性催化还原（SCR）入口NOx模块; 构造成用于解释SCR出口NOx数据的SCR出口NOx模块; 以及系统诊断模块，其被构造成基于SCR温度范围内的SCR入口和出口NOx数据来确定SCR系统的效率，其中所述系统诊断模块进一步被构造为确定柴油氧化物中的至少一种的状态 催化剂（DOC），柴油微粒过滤器（DPF）和基于SCR升高的SCR温度范围内的SCR效率的SCR系统，以及相对于高SCR效率阈值和低SCR效率阈值的SCR相对较低的SCR温度范围内的SCR效率 效率阈值。
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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：US09228468B2
公开(公告)日：2016-01-05
申请号：US14172259
申请日：2014-02-04
Applicant: Cummins Inc.
Inventor： Aleksey Yezerets , Tamas Szailer , Krishna Kamasamudram , Neal W. Currier , Richard J. Ancimer
CPC classification number: F01N3/208 , F01N3/0253 , F01N3/035 , F01N3/106 , F01N3/2006 , F01N3/2066 , F01N13/009 , F01N2260/04 , F01N2550/02 , F01N2560/02 , F01N2570/18 , F01N2610/00 , F01N2900/0601 , F01N2900/08 , F01N2900/1402 , F01N2900/1404 , F01N2900/1602 , F01N2900/1621 , F02D41/027 , F02D41/405 , F02D2200/0802 , Y02T10/24
Abstract: Systems, methods and apparatus are disclosed for targeted regeneration of a catalyst device in an exhaust aftertreatment system of an internal combustion engine. The targeted regeneration can include interpreting, initiating, and/or completing a regeneration event for an SCR catalyst or other type of catalyst in response to a catalyst deactivation condition. A catalyst regeneration event includes at least one of exposing the catalyst to a sufficiently high temperature over a time period that removes contaminants from the catalyst and manipulation of the exhaust gas composition to initiate and/or accelerate removal of contaminants from the catalyst.
Abstract translation: 公开了用于内燃机的排气后处理系统中的催化剂装置的目标再生的系统，方法和装置。 目标再生可以包括解释，启动和/或完成SCR催化剂或其他类型的催化剂的响应于催化剂失活条件的再生事件。 催化剂再生事件包括在一段时间内将催化剂暴露于足够高的温度中的至少一种，其从催化剂中去除污染物并操纵废气组合物以引发和/或加速从催化剂中除去污染物。
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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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公开(公告)号：US09624803B2
公开(公告)日：2017-04-18
申请号：US14826704
申请日：2015-08-14
Applicant: Cummins Inc.
Inventor： Ashok Kumar , Michael A. Smith , Krishna Kamasamudram , Neal Currier , Aleksey Yezerets
CPC classification number: F01N3/2066 , F01N3/106 , F01N3/208 , F01N9/00 , F01N9/005 , F01N11/002 , F01N13/009 , F01N2570/04 , F01N2900/1402 , F01N2900/1612 , F02B37/22 , F02D41/005 , F02D43/04 , Y02T10/144 , Y02T10/24 , Y02T10/47
Abstract: Systems, methods, and apparatuses are provided for determining an SCR component sulfur value, determining whether the SCR component sulfur value exceeds a sulfur regeneration threshold and increasing an engine NO amount incident to an SCR catalyst in response to the SCR component sulfur value exceeding the sulfur regeneration threshold.
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