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公开(公告)号：US20200095916A1
公开(公告)日：2020-03-26
申请号：US16138453
申请日：2018-09-21
Applicant: Cummins Inc.
Inventor： Michael Haas , Krishna Kamasamudrum , Ashok Kumar
Abstract: Systems, apparatuses, and methods include an upstream exhaust analysis circuit structured to determine a characteristic of an exhaust gas stream entering a nitrous oxide (NOx) storage catalyst; a prediction circuit structured to predict a downstream NOx concentration of an exhaust gas stream exiting the NOx storage catalyst based on a model of a NOx storage capacity or a dynamic response of the NOx storage catalyst; a downstream exhaust analysis circuit structured to determine a downstream NOx concentration of the exhaust gas stream exiting the NOx storage catalyst; and a comparison circuit structured to compare the predicted downstream NOx concentration to the determined downstream NOx concentration, and determine a health of the NOx storage catalyst based on the comparison.
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公开(公告)号：US10544720B2
公开(公告)日：2020-01-28
申请号：US15408799
申请日：2017-01-18
Applicant: Cummins Inc.
Inventor： Michael Haas , Krishna Kamasamudram , Ashok Kumar
Abstract: An internal combustion engine system includes an engine and an aftertreatment system that is connected to the engine to receive an exhaust flow from the engine. The aftertreatment system includes a contaminant storage catalyst for storing contaminants produced by the engine during cold start and low temperature operating conditions, and a NOx reduction catalyst downstream of the storage catalyst for receiving the contaminants released from the storage catalyst when temperature conditions in the exhaust flow and/or NOx reduction catalyst are above an effective temperature threshold for NOx reduction. A contaminant amount stored on the storage catalyst can be estimated in response to one or more operating parameters to manage a storage capacity of the storage catalyst. A bypass can used to bypass the storage catalyst to preserve storage capacity for a subsequent cold start condition.
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公开(公告)号：US20180363528A1
公开(公告)日：2018-12-20
申请号：US16062266
申请日：2016-12-27
Applicant: CUMMINS INC.
Inventor： Jinyong Luo , Ashok Kumar , Krishna Kamasamudram , Neal W. Currier , Aleksey Yezerets , Yadan Tang , Michael J. Cunningham , Di Wang
Abstract: A method of recovering selective catalytic reduction catalysts relates to metal-Zeolite based catalysts. A selective catalytic reduction catalyst service event where a metal-Zeolite based selective catalytic reduction catalyst of an exhaust aftertreatment system may perform below a threshold level of performance is determined. The selective catalytic reduction catalyst then exposed to a recovery fluid selected to facilitate movement of metal ions.
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公开(公告)号：US20170226911A1
公开(公告)日：2017-08-10
申请号：US15408799
申请日：2017-01-18
Applicant: Cummins Inc.
Inventor： Michael Haas , Krishna Kamasamudram , Ashok Kumar
CPC classification number: F01N3/2053 , F01N3/0807 , F01N3/0842 , F01N3/2006 , F01N3/2033 , F01N3/2066 , F01N9/00 , F01N2410/03 , F01N2410/06 , F01N2610/02 , F01N2610/03 , F01N2900/1602 , F01N2900/1614 , Y02T10/24 , Y02T10/26 , Y02T10/47
Abstract: An internal combustion engine system includes an engine and an aftertreatment system that is connected to the engine to receive an exhaust flow from the engine. The aftertreatment system includes a contaminant storage catalyst for storing contaminants produced by the engine during cold start and low temperature operating conditions, and a NOx reduction catalyst downstream of the storage catalyst for receiving the contaminants released from the storage catalyst when temperature conditions in the exhaust flow and/or NOx reduction catalyst are above an effective temperature threshold for NOx reduction. A contaminant amount stored on the storage catalyst can be estimated in response to one or more operating parameters to manage a storage capacity of the storage catalyst. A bypass can used to bypass the storage catalyst to preserve storage capacity for a subsequent cold start condition.
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公开(公告)号：US09517457B2
公开(公告)日：2016-12-13
申请号：US14067814
申请日：2013-10-30
Applicant: Cummins Inc.
Inventor： Krishna Kamasamudram , Neal W. Currier , Ashok Kumar
CPC classification number: B01J29/78 , B01D53/9409 , B01D53/9431 , B01D2251/206 , B01D2255/20723 , B01D2255/20738 , B01D2255/20761 , B01D2255/50 , B01D2255/9032 , B01D2258/012 , B01J29/72 , F01N3/106 , F01N3/2066 , F01N13/009 , F01N13/0093 , F01N2510/0682 , F01N2570/145 , F01N2900/1404 , Y02A50/2344 , Y02C20/10 , Y02T10/24
Abstract: Systems, apparatus and methods are disclosed for reducing the amount of nitrous oxide (N2O) produced in a selective catalytic reductant (SCR) catalyst in an exhaust aftertreatment system. The SCR catalysts are arranged to reduce the amount of N2O produced during NOx reduction while not adversely affecting NOx conversion.
Abstract translation: 公开了用于减少排气后处理系统中在选择性催化还原剂（SCR）催化剂中产生的一氧化二氮（N2O）的量的系统，装置和方法。 SCR催化剂被设置为减少NOx还原期间产生的N 2 O的量，而不会不利地影响NOx转化。
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Patent Agency Ranking
6.发明申请SYSTEMS AND METHODS FOR DESULFATION OF AN OXIDATION CATALYST FOR DUAL FUEL ENGINES 审中-公开用于消除双燃料发动机的氧化催化剂的系统和方法公开(公告)号：US20160281619A1
公开(公告)日：2016-09-29
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
CPC classification number: F01N3/0885 , B01D53/944 , B01D53/9477 , B01D53/9495 , B01D2255/1021 , B01D2255/1023 , F01N3/103 , F01N3/106 , F01N3/2033 , F01N3/2066 , F01N9/00 , F01N13/0093 , F01N2260/04 , F01N2430/06 , F01N2560/023 , F01N2560/06 , F01N2560/14 , F01N2610/02 , F01N2900/1402 , F01N2900/1404 , F02D19/06 , F02D41/0025 , F02D41/024 , F02D41/027 , F02D41/405 , F02D2200/0818 , Y02T10/24 , Y02T10/26 , Y02T10/36 , Y02T10/44 , Y02T10/47
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.
Abstract translation: 公开了一种在多余内燃机的后处理系统中脱硫氧化催化剂的系统和方法。 响应于一个或多个脱硫触发事件，氧化催化剂可以脱硫。 脱硫方法包括将烃从多个燃料源中的一个或全部提供给上游氧化催化剂。 所述烃与上游氧化催化剂内的废气反应，以消耗排气中的氧气，从而降低氧化催化剂的脱硫温度，同时将废气的温度提高到脱硫温度范围。
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7.发明授权公开(公告)号：US09080524B2
公开(公告)日：2015-07-14
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
IPC: F01N3/20 , F02D41/02 , F01N3/08 , F01N3/10 , B01J38/06 , B01J38/08 , B01J38/56 , B01J38/04 , F01N11/00
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.
Abstract translation: 公开了用于处理暴露于一定量硫的还原催化剂的系统，装置和方法。 还原催化剂的处理包括在还原催化剂的上游位置提供流体物流。 流体流包括温度和还原剂量，并且还原剂量包括一定量的尿素，氨或烃。
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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：US11220944B2
公开(公告)日：2022-01-11
申请号：US16062266
申请日：2016-12-27
Applicant: CUMMINS INC.
Inventor： Jinyong Luo , Ashok Kumar , Krishna Kamasamudram , Neal W. Currier , Aleksey Yezerets , Yadan Tang , Michael J. Cunningham , Di Wang
Abstract: A method of recovering selective catalytic reduction catalysts relates to metal-Zeolite based catalysts. A selective catalytic reduction catalyst service event where a metal-Zeolite based selective catalytic reduction catalyst of an exhaust aftertreatment system may perform below a threshold level of performance is determined. The selective catalytic reduction catalyst then exposed to a recovery fluid selected to facilitate movement of metal ions.
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