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26 条记录 (耗时 0.021 秒)

    Ammonia sensor control, with NOx feedback, of an SCR aftertreatment system
    12.
    发明授权
    Ammonia sensor control, with NOx feedback, of an SCR aftertreatment system 有权

    公开(公告)号：US10392991B2

    公开(公告)日：2019-08-27

    申请号：US15298992

    申请日：2016-10-20

    申请人： Cummins Inc.

    发明人： Mert Geveci ,  Andrew W. Osburn

    IPC分类号： F01N3/20 ,  F01N9/00 ,  F01N13/00 ,  F01N11/00

    摘要： An exemplary method includes determining an NH3 reference target in an exhaust conduit between a first SCR catalyst and a second SCR catalyst. The method includes determining a present amount of NH3 in the exhaust conduit between the first SCR catalyst and the second SCR catalyst, and determining an NH3 error term in response to the NH3 reference target and the present amount of NH3. The method further includes determining an amount of NOx downstream of the second SCR catalyst, and adjusting one of the NH3 reference target and a reductant doser command in response to the amount of NOx downstream of the second SCR catalyst. The method further includes providing a reductant doser command in response to the NH3 error term.

    NOx sensor diagnostic for an exhaust aftertreatment system
    13.
    发明授权
    NOx sensor diagnostic for an exhaust aftertreatment system 有权

    公开(公告)号：US10156176B2

    公开(公告)日：2018-12-18

    申请号：US15708788

    申请日：2017-09-19

    申请人： Cummins, Inc.

    发明人： Andrew W. Osburn ,  Christopher Ferguson ,  Tony James Hall ,  Brian P. Liimatta

    IPC分类号： F01N3/00 ,  F01N11/00 ,  F01N3/20

    摘要： A method for diagnosing NOx sensors in an exhaust aftertreatment system includes suspending reductant dosing in an exhaust aftertreatment system; purging a reductant deposit in a selective catalytic reduction (SCR) system of the exhaust aftertreatment system; adjusting at least one of an ignition timing and an engine speed for an engine to adjust an engine out nitrogen oxide (NOx) amount; receiving measured SCR inlet NOx data from a SCR inlet NOx sensor and measured SCR outlet NOx data from a SCR outlet NOx sensor; determining a phase shift between the measured SCR inlet and SCR outlet NOx data; applying the determined phase shift to the SCR outlet NOx data; and determining a diagnostic feature based on the SCR inlet NOx data and the phase shifted SCR outlet NOx data regarding a state of the SCR inlet and outlet NOx sensors.

    ENGINE-OUT EMISSIONS CONTROLS
    14.
    发明申请
    ENGINE-OUT EMISSIONS CONTROLS 审中-公开
    发动机排放排放控制

    公开(公告)号：US20160245208A1

    公开(公告)日：2016-08-25

    申请号：US15144956

    申请日：2016-05-03

    申请人： Cummins Inc.

    发明人： Phanindra V. Garimella ,  Andrew W. Osburn ,  Ming-Feng Hsieh

    IPC分类号： F02D41/14 ,  F02D41/40 ,  F02D41/00

    CPC分类号： F02D41/1461 ,  F02D37/02 ,  F02D41/0007 ,  F02D41/0052 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/40 ,  F02D2041/141 ,  F02D2200/0614 ,  F02D2200/101 ,  Y02T10/144 ,  Y02T10/44 ,  Y02T10/47

    摘要： Unique apparatuses, methods, and systems including engine-out emissions controls are disclosed. One embodiment is a system including an internal combustion engine system including at least one fueling actuator and at least one air handling actuator and an electronic controller. The electronic structure may be structured to determine initial values for a plurality of combustion references, determine a plurality of target emissions values or ranges based upon the plurality of combustion references, determine errors between the emissions target values or ranges and sensed emissions information, determine correction factors and weighting factors for the combustion references, the weighting factors being based at least in part upon the errors between the between the emissions target values or ranges and sensed emissions information, selectably determine modified values for the combustion references based upon the correction factors and the weighting factors, and control operation of the at least one fueling actuator and at least one air handling actuator based upon the modified values.

    摘要翻译： 公开了独特的设备，方法和系统，包括发动机排放控制。 一个实施例是包括内燃机系统的系统，该内燃机系统包括至少一个加油致动器和至少一个空气处理致动器和电子控制器。 电子结构可以被构造为确定多个燃烧参考的初始值，基于多个燃烧参考确定多个目标发射值或范围，确定发射目标值或范围之间的误差以及感测的发射信息，确定校正 因素和加权因子，加权因子至少部分地基于排放目标值或范围之间的误差和感测的排放信息，可选择地基于校正因子确定燃烧参考的修正值，并且 加权因子，以及基于修改的值的至少一个加油致动器和至少一个空气处理致动器的控制操作。

    Engine-out emissions controls
    17.
    发明授权
    Engine-out emissions controls 有权

    公开(公告)号：US10100768B2

    公开(公告)日：2018-10-16

    申请号：US15144956

    申请日：2016-05-03

    申请人： Cummins Inc.

    发明人： Phanindra V. Garimella ,  Andrew W. Osburn ,  Ming-Feng Hsieh

    IPC分类号： F02D41/14 ,  F02D41/40 ,  F02D37/02 ,  F02D41/00

    摘要： Unique apparatuses, methods, and systems including engine-out emissions controls are disclosed. One embodiment is a system including an internal combustion engine system including at least one fueling actuator and at least one air handling actuator and an electronic controller. The electronic structure may be structured to determine initial values for a plurality of combustion references, determine a plurality of target emissions values or ranges based upon the plurality of combustion references, determine errors between the emissions target values or ranges and sensed emissions information, determine correction factors and weighting factors for the combustion references, the weighting factors being based at least in part upon the errors between the between the emissions target values or ranges and sensed emissions information, selectably determine modified values for the combustion references based upon the correction factors and the weighting factors, and control operation of the at least one fueling actuator and at least one air handling actuator based upon the modified values.

    Method and algorithm for performing an NH3 sensor rationality diagnostic
    19.
    发明授权
    Method and algorithm for performing an NH3 sensor rationality diagnostic 有权
    执行NH3传感器理性诊断的方法和算法

    公开(公告)号：US09429062B2

    公开(公告)日：2016-08-30

    申请号：US14479643

    申请日：2014-09-08

    申请人： Cummins Inc.

    发明人： Andrew W. Osburn ,  Feng Liu ,  Mert Geveci

    IPC分类号： F01N3/00 ,  F01N11/00 ,  B01D53/94 ,  F01N3/20 ,  F01N3/10

    CPC分类号： F01N11/00 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/103 ,  F01N3/2066 ,  F01N3/208 ,  F01N2560/021 ,  F01N2560/026 ,  F01N2900/0416 ,  Y02T10/24 ,  Y02T10/47

    摘要： An example method includes interpreting an NH3 composition value at a position upstream of a selective reduction catalyst (SCR) element fluidly disposed in the exhaust conduit of an engine, interpreting a NOx composition value at a position downstream of the SCR element, and determining an NH3 sensor rationality threshold in response to the upstream NH3 composition value. The method further includes determining an NH3 sensor health value as indicating a sensor failure in response to the downstream NOx composition value exceeding the NH3 sensor rationality threshold.

    摘要翻译： 示例性方法包括解释在发动机的排气管道中流体设置的选择性还原催化剂（SCR）元件的上游位置处的NH 3组成值，解释在SCR元件下游的位置处的NOx组成值，以及确定NH 3 响应上游NH3组成值的传感器理性阈值。 该方法还包括根据超过NH3传感器合理性阈值的下游NOx组成值，确定NH3传感器健康值作为指示传感器故障。