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公开(公告)号：US20240337209A1
公开(公告)日：2024-10-10
申请号：US18749501
申请日：2024-06-20
申请人： Cummins Inc.
CPC分类号： F01N11/00 , F01N3/106 , F01N3/2066 , F01N2430/06 , F01N2550/02 , F01N2560/026 , F01N2560/14 , F01N2570/18 , F01N2610/02 , F01N2610/146 , F01N2900/0408 , F01N2900/0411 , F01N2900/08 , F01N2900/1602 , F01N2900/1616 , F01N2900/1622
摘要： A system includes a controller having at least one processor coupled to a memory storing instructions that, when executed by the at least one processor, causes the controller to: receive data indicative of operating conditions of at least one of an engine or of an aftertreatment system; determine, during a first period of time, that an amount of NOx output from the aftertreatment system satisfies a low NOx operating mode condition based on the data indicative of operating conditions; determine, during a second period of time, that operating conditions for a conversion efficiency are present based on the data indicative of the operating conditions of the aftertreatment system; determine that the amount of NOx output from the aftertreatment system satisfies a high NOx operating mode condition; and selectively set an alert based on a retrieved minimum value and a retrieved maximum value of the amount of NOx outputs.
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公开(公告)号：US12044155B2
公开(公告)日：2024-07-23
申请号：US17928138
申请日：2021-05-27
申请人： Cummins Inc.
CPC分类号： F01N11/00 , F01N3/106 , F01N3/2066 , F01N2430/06 , F01N2550/02 , F01N2560/026 , F01N2560/14 , F01N2570/18 , F01N2610/02 , F01N2610/146 , F01N2900/0408 , F01N2900/0411 , F01N2900/08 , F01N2900/1602 , F01N2900/1616 , F01N2900/1622
摘要： A method for diagnosing a NOx sensor is provided. The method includes receiving data indicative of operating conditions of an engine or an aftertreatment system; determining, during a first period of time, that an amount of NOx output from the aftertreatment system satisfies a low NOx operating mode condition; determining, during a second period of time, that operating conditions for ammonia slip are present based on data regarding operation of the aftertreatment system; responsive to the determination that operating conditions for ammonia slip are present, determining that the amount of NOx output from the aftertreatment system satisfies a high NOx operating mode condition; comparing a difference between a minimum value from the first period of time and a maximum value from a second period of time to a diagnostic threshold; and responsive to the difference being less than the diagnostic threshold, setting an alert.
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公开(公告)号：US20230220794A1
公开(公告)日：2023-07-13
申请号：US17928138
申请日：2021-05-27
申请人： Cummins Inc.
CPC分类号： F01N11/00 , F01N3/106 , F01N3/2066 , F01N2430/06 , F01N2550/02 , F01N2560/026 , F01N2560/14 , F01N2570/18 , F01N2610/02 , F01N2610/146 , F01N2900/0408 , F01N2900/0411 , F01N2900/08 , F01N2900/1602 , F01N2900/1616 , F01N2900/1622
摘要： A method for diagnosing a NOx sensor is provided. The method includes receiving data indicative of operating conditions of an engine or an aftertreatment system; determining, during a first period of time, that an amount of NOx output from the aftertreatment system satisfies a low NOx operating mode condition; determining, during a second period of time, that operating conditions for ammonia slip are present based on data regarding operation of the aftertreatment system; responsive to the determination that operating conditions for ammonia slip are present, determining that the amount of NOx output from the aftertreatment system satisfies a high NOx operating mode condition; comparing a difference between a minimum value from the first period of time and a maximum value from a second period of time to a diagnostic threshold; and responsive to the difference being less than the diagnostic threshold, setting an alert.
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