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公开(公告)号：US11499468B2
公开(公告)日：2022-11-15
申请号：US17246893
申请日：2021-05-03
Applicant: Cummins, Inc.
Inventor： Adam W. Kidd , Michael Haas
Abstract: A method includes: interpreting first oxygen data acquired by a first nitrous oxide (NOx) sensor indicative of a first amount of oxygen in an exhaust flow at a location in or proximate to an exhaust aftertreatment system, wherein the exhaust aftertreatment system is in exhaust gas receiving communication with an engine; estimating an amount of oxygen in the exhaust flow entering the exhaust aftertreatment system from the engine based on engine operation data; and, determining that the NOx sensor is faulty based on determining that a difference between the first amount of oxygen and the estimated amount of oxygen is greater than a threshold value.
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公开(公告)号：US11286827B2
公开(公告)日：2022-03-29
申请号：US16927727
申请日：2020-07-13
Applicant: Cummins Inc.
Inventor： Bharath Sundar , Apurva Arvind Chunodkar , Michael Haas , Astha Kukreja
Abstract: A system has a pump and an injector coupled to the pump. The system further comprises a controller coupled to the pump and the injector. The controller is structured to: determine a change of reductant flow relative to a change of pump rate of the pump; and generate a status command indicative of at least one of an under-restricted injector or an over-restricted injector in response to the determination of the change of reductant flow relative to the change of pump rate of the pump.
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33.发明申请公开(公告)号：US20210270177A1
公开(公告)日：2021-09-02
申请号：US17321853
申请日：2021-05-17
Applicant: Cummins Inc.
Inventor： Jeffrey David Selwyn Diwakar Abraham , Ananth Vemuri , Michael Haas , Adam W. Kidd
Abstract: A method, system, and apparatus relating to operating an internal combustion engine include steps or features for determining a performance threshold of a particulate filter disposed in an exhaust gas flow of the engine having a set time interval between regeneration events of the particulate filter; determining a rate at which the particulate filter is reaching the performance threshold; and controlling an exhaust gas characteristic to control the rate so that the performance threshold is reached at or just before an end of the time interval. In an embodiment, there are steps or features for interpreting a filter condition of the particulate filter; determining a particulate matter load rate of the filter as a function of the condition; determining a limit of an exhaust gas characteristic based on the load rate; and controlling engine operation to control the exhaust gas characteristic to satisfy the limit.
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34.发明授权公开(公告)号：US11035279B2
公开(公告)日：2021-06-15
申请号：US16871659
申请日：2020-05-11
Applicant: Cummins Inc.
Inventor： Jeffrey David Selwyn Diwakar Abraham , Ananth Vemuri , Michael Haas , Adam W. Kidd
Abstract: A method, system, and apparatus relating to operating an internal combustion engine include steps or features for determining a performance threshold of a particulate filter disposed in an exhaust gas flow of the engine having a set time interval between regeneration events of the particulate filter; determining a rate at which the particulate filter is reaching the performance threshold; and controlling an exhaust gas characteristic to control the rate so that the performance threshold is reached at or just before an end of the time interval. In an embodiment, there are steps or features for interpreting a filter condition of the particulate filter; determining a particulate matter load rate of the filter as a function of the condition; determining a limit of an exhaust gas characteristic based on the load rate; and controlling engine operation to control the exhaust gas characteristic to satisfy the limit.
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公开(公告)号：US20210102488A1
公开(公告)日：2021-04-08
申请号：US17247506
申请日：2020-12-14
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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Patent Agency Ranking
公开(公告)号：US20200370454A1
公开(公告)日：2020-11-26
申请号：US16989109
申请日：2020-08-10
Applicant: Cummins Inc.
Inventor： Aniket Gupta , Michael J. Cunningham , Michael Haas , Govindarajan Kothandaraman
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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公开(公告)号：US20200340381A1
公开(公告)日：2020-10-29
申请号：US16927727
申请日：2020-07-13
Applicant: Cummins Inc.
Inventor： Bharath Sundar , Apurva Arvind Chunodkar , Michael Haas , Astha Kukreja
Abstract: A system has a pump and an injector coupled to the pump. The system further comprises a controller coupled to the pump and the injector. The controller is structured to: determine a change of reductant flow relative to a change of pump rate of the pump; and generate a status command indicative of at least one of an under-restricted injector or an over-restricted injector in response to the determination of the change of reductant flow relative to the change of pump rate of the pump.
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38.发明授权公开(公告)号：US10767584B2
公开(公告)日：2020-09-08
申请号：US15456810
申请日：2017-03-13
Applicant: Cummins Inc.
Inventor： Michael Haas , Adam W. Kidd , Jeffrey David Selwyn Diwakar Abraham
IPC: F01N9/00 , F01N3/20 , F01N11/00 , F02D41/02 , F01N3/10 , F01N3/021 , F02D41/00 , F02D41/30 , F02D41/14
Abstract: Systems and apparatuses include an apparatus including an aftertreatment system control circuit structured to receive a signal indicative of an exhaust gas characteristic from a sensor, determine an aftertreatment system characteristic based on the exhaust gas characteristic, determine an acceptable input value responsive to the aftertreatment system characteristic, and control at least one of a fuel system actuator and an air handling actuator to achieve or substantially achieve the acceptable input value.
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公开(公告)号：US10738671B2
公开(公告)日：2020-08-11
申请号：US15866776
申请日：2018-01-10
Applicant: Cummins, Inc.
Inventor： Aniket Gupta , Michael J. Cunningham , Michael Haas , Govindarajan Kothandaraman
Abstract: A method includes interpreting NOx data indicative of an amount of NOx exiting an engine and an amount of NOx exiting an exhaust aftertreatment system coupled to the engine, determining a NOx conversion efficiency fault is present based on the amount of NOx exiting the engine and the amount of NOx exiting the exhaust aftertreatment system, and determining at least one of a selective catalytic reduction (SCR) catalyst of the exhaust aftertreatment system and a diesel particulate filter having a coating of a SCR reaction catalyst (DPF-SCR) of the exhaust aftertreatment system are responsible for the NOx conversion efficiency fault based on at least one of a reductant slip amount and a NOx conversion value across at least one of the SCR catalyst and the DPF-SCR.
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公开(公告)号：US20200031332A1
公开(公告)日：2020-01-30
申请号：US16514753
申请日：2019-07-17
Applicant: Cummins Inc.
Inventor： Archit N. Koti , Apurva A. Chunodkar , Arun Prakash Thunga Gopal , Feng Liu , Kenneth M. Follen , Michael Haas , Pinak Jayant Tulpule , Vivek A. Sujan
Abstract: A vehicle comprises an aftertreatment system configured to reduce constituents of an exhaust gas. The vehicle also includes a controller configured to determine a predicted load on the vehicle during a route, and adjust at least one of a temperature of the aftertreatment system or an amount of a reductant inserted into the aftertreatment system based on the predicted load.
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