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公开(公告)号：US11725564B2
公开(公告)日：2023-08-15
申请号：US16989109
申请日：2020-08-10
Applicant: Cummins Inc.
Inventor： Aniket Gupta , Michael J. Cunningham , Michael Haas , Govindarajan Kothandaraman
CPC classification number: F01N11/00 , F01N3/035 , F01N3/0835 , F01N3/0842 , F01N3/103 , F01N3/2066 , F01N13/0093 , F01N2550/02 , F01N2560/021 , F01N2560/026 , F01N2560/06 , F01N2560/14 , F01N2610/02 , F01N2900/1402 , F01N2900/1616 , F01N2900/1621 , Y02T10/12 , Y02T10/40
Abstract: A method includes acquiring nitrogen oxide (NOx) data indicative of a first amount of NOx in an exhaust flow exiting an engine and a second amount of NOx in the exhaust flow exiting an exhaust aftertreatment system coupled to the engine where the exhaust aftertreatment system including a selective catalytic reduction (SCR) system including a SCR catalyst; determining a NOx conversion efficiency fault is present within the exhaust aftertreatment system based on the first amount of NOx and the second amount of NOx; monitoring an actual amount of NOx in the exhaust flow downstream of the SCR catalyst; determining an expected amount of NOx downstream of the SCR catalyst; and determining the SCR catalyst is responsible for the NOx conversion efficiency fault in response to the actual amount of NOx differing from the expected amount of NOx by more than a threshold amount.
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2.发明授权公开(公告)号：US10022667B2
公开(公告)日：2018-07-17
申请号：US15663457
申请日：2017-07-28
Applicant: Cummins Inc.
Inventor： Yuhui Zha , John K Heichelbech , Michael J. Cunningham
Abstract: An aftertreatment system includes a first oxidation catalyst, a second oxidation catalyst, and a turbocharger. The first oxidation catalyst is upstream of the turbocharger and includes a first oxidation catalyst formulation. The second oxidation catalyst is downstream of the turbocharger and includes a second oxidation catalyst formulation different than the first oxidation catalyst formulation. The second oxidation catalyst formulation is configured to promote conversion of nitric oxide (NO) to nitrogen dioxide (NO2).
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公开(公告)号：US20220154615A1
公开(公告)日：2022-05-19
申请号：US17592770
申请日：2022-02-04
Applicant: Cummins Inc.
Inventor： Michael J. Cunningham , Neal W. Currier , Saurabh Yashwant Joshi , Antonius Padua Nusawardhana , Aleksey Yezerets
Abstract: 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.
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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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公开(公告)号：US20210256684A1
公开(公告)日：2021-08-19
申请号：US17174884
申请日：2021-02-12
Applicant: Cummins Inc.
Inventor： Yujun Wang , Ben Wang , Carl Justin Kamp , Leigh Anne Rogoski , Rafael Ernesto Vasquez Lombardo , Michael J. Cunningham , Krishna Pradeep Chilumukuru , Neal W. Currier
Abstract: A computer system is structured to determine a density of particulate matter in a diesel particulate filter (DPF) sample. The computer system includes a processing circuit having a processor and a memory. The processing circuit is structured to generate a computed tomography (CT) scan-based image of the DPF sample; and, segment the CT scan-based image of the DPF sample into a plurality of regions. For at least one region from the plurality of regions, the processing circuit is structured to determine a density of a portion of the DPF sample corresponding to the at least one region of the CT scan-based image of the DPF sample and cause an electronic display of a user device to display the CT scan-based image including the at least one region and an indication of the density for the at least one region.
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Patent Agency Ranking
公开(公告)号：US20170114690A1
公开(公告)日：2017-04-27
申请号：US15389625
申请日：2016-12-23
Applicant: Cummins Inc.
Inventor： Aniket Gupta , Michael J. Cunningham
CPC classification number: F01N3/208 , B01D46/0027 , B01D53/9418 , B01D53/9431 , B01D53/9486 , B01D53/9495 , F01N3/02 , F01N3/0205 , F01N3/023 , F01N3/035 , F01N3/0807 , F01N3/0814 , F01N3/0821 , F01N3/0835 , F01N3/0842 , F01N3/103 , F01N13/009 , F01N13/0093 , F01N2560/06 , F01N2560/08 , F01N2560/14 , F01N2610/02 , F01N2610/1453 , F01N2610/146 , F01N2900/0416 , F01N2900/1602 , F01N2900/1621 , F01N2900/1622 , Y02T10/24
Abstract: Systems, apparatus and methods are provided for reducing reductant consumption in an exhaust aftertreatment system that includes a first SCR device and a downstream second SCR device, a first reductant injector upstream of the first SCR device, and a second reductant injector between the first and second SCR devices. NOx conversion occurs with reductant injection by the first reductant injector to the first SCR device in a first temperature range and with reductant injection by the second reductant injector to the second SCR device when the temperature of the first SCR device is above a reductant oxidation conversion threshold.
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7.发明授权Systems and methods to reduce reductant consumption in exhaust aftertreament systems 有权减少尾气系统中还原剂消耗的系统和方法公开(公告)号：US09567888B2
公开(公告)日：2017-02-14
申请号：US14461952
申请日：2014-08-18
Applicant: Cummins Inc.
Inventor： Aniket Gupta , Michael J. Cunningham
CPC classification number: F01N3/208 , B01D46/0027 , B01D53/9418 , B01D53/9431 , B01D53/9486 , B01D53/9495 , F01N3/02 , F01N3/0205 , F01N3/023 , F01N3/035 , F01N3/0807 , F01N3/0814 , F01N3/0821 , F01N3/0835 , F01N3/0842 , F01N3/103 , F01N13/009 , F01N13/0093 , F01N2560/06 , F01N2560/08 , F01N2560/14 , F01N2610/02 , F01N2610/1453 , F01N2610/146 , F01N2900/0416 , F01N2900/1602 , F01N2900/1621 , F01N2900/1622 , Y02T10/24
Abstract: Systems, apparatus and methods are provided for reducing reductant consumption in an exhaust aftertreatment system that includes a first SCR device and a downstream second SCR device, a first reductant injector upstream of the first SCR device, and a second reductant injector between the first and second SCR devices. NOx conversion occurs with reductant injection by the first reductant injector to the first SCR device in a first temperature range and with reductant injection by the second reductant injector to the second SCR device when the temperature of the first SCR device is above a reductant oxidation conversion threshold.
Abstract translation: 提供的系统，装置和方法用于减少排气后处理系统中的还原剂消耗，其包括第一SCR装置和下游第二SCR装置，第一SCR装置的上游的第一还原剂注入器和第一和第二SCR装置之间的第二还原剂注入器 SCR设备。 当第一SCR装置的温度高于还原剂氧化转化阈值时，通过第一还原剂注入器向第一SCR装置在第一温度范围内的还原剂注入和第二还原剂注入器向第二SCR装置注入还原剂， 。
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公开(公告)号：US11928806B2
公开(公告)日：2024-03-12
申请号：US17174884
申请日：2021-02-12
Applicant: Cummins Inc.
Inventor： Yujun Wang , Ben Wang , Carl Justin Kamp , Leigh Anne Rogoski , Rafael Ernesto Vasquez Lombardo , Michael J. Cunningham , Krishna Pradeep Chilumukuru , Neal W. Currier
CPC classification number: G06T7/0004 , G05B15/02 , G06T3/40 , G06T7/11 , G06T2207/10081 , G06T2207/20132
Abstract: A computer system is structured to determine a density of particulate matter in a diesel particulate filter (DPF) sample. The computer system includes a processing circuit having a processor and a memory. The processing circuit is structured to generate a computed tomography (CT) scan-based image of the DPF sample; and, segment the CT scan-based image of the DPF sample into a plurality of regions. For at least one region from the plurality of regions, the processing circuit is structured to determine a density of a portion of the DPF sample corresponding to the at least one region of the CT scan-based image of the DPF sample and cause an electronic display of a user device to display the CT scan-based image including the at least one region and an indication of the density for the at least one region.
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9.发明公开公开(公告)号：US20240077009A1
公开(公告)日：2024-03-07
申请号：US18493645
申请日：2023-10-24
Applicant: Cummins Inc.
Inventor： Michael J. Cunningham , Neal W. Currier , Saurabh Yashwant Joshi , Antonius Padua Nusawardhana , Aleksey Yezerets
CPC classification number: F01N3/208 , F01N3/2006 , F01N9/005 , F01N3/101 , F01N2560/026 , F01N2570/14 , F01N2610/02 , F01N2610/146 , F01N2900/1402 , F01N2900/1818
Abstract: 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.
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10.发明公开公开(公告)号：US20240026808A1
公开(公告)日：2024-01-25
申请号：US18266192
申请日：2021-12-08
Applicant: Cummins Inc.
Inventor： Kristopher R. Bare , Michael J. Cunningham , Jennifer Kay Light-Holets , Xiaobo Song , Agneya Turlapati
CPC classification number: F01N3/208 , F01N9/007 , F01N11/00 , F01N2250/02 , F01N2560/026 , F01N2900/08 , F01N2900/1411 , F01N2610/02 , F01N2900/0412
Abstract: A system includes an exhaust aftertreatment system coupled to an engine, and a controller including at least one processor coupled to at least one memory device storing instructions that, when executed by the at least one processor, cause the controller to perform certain operations. The operations include estimating an aging of the exhaust aftertreatment system, and adjusting at least one of an entry temperature threshold or an exit temperature threshold for a thermal management mode for the exhaust aftertreatment system based on the aging of the exhaust aftertreatment system.
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