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    System and method for managing contaminant storage in a storage catalyst
    51.
    发明授权
    System and method for managing contaminant storage in a storage catalyst 有权

    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

    IPC: F01N3/20 ,  F01N9/00

    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.

    Exhaust aftertreatment thermal management controls
    52.
    发明授权
    Exhaust aftertreatment thermal management controls 有权

    公开(公告)号：US10302034B2

    公开(公告)日：2019-05-28

    申请号：US15416622

    申请日：2017-01-26

    Applicant: Cummins Inc.

    Inventor： Adam W. Kidd ,  Hoseinali Borhan ,  Bibin N. Pattel ,  Edmund P. Hodzen ,  Michael Haas ,  Jeffrey Diwakar Abraham ,  Bryon D. Staebler

    IPC: F02D41/02 ,  B01D53/94 ,  F01N3/20 ,  F02D41/14 ,  F02D41/30

    Abstract: One exemplary embodiment is a method of operating a system comprising an internal combustion engine system, and an exhaust aftertreatment system comprising an SCR catalyst, and an electronic control system. The method comprises operating the electronic control system to perform the acts of determining a predicted temperature value indicative of a predicted future temperature of the SCR catalyst, determining a temperature profile value using the predicted temperature value and a current temperature value indicative of a current temperature of the SCR catalyst, operating a controller to provide an output indicating a difference between the temperature profile value and a temperature target, determining a heat request using the output of the controller, filtering the heat request using a prediction horizon, and controlling operation of the engine system using the filtered heat request to increase a temperature of the SCR catalyst.

    System variation adaption for feed-forward controller
    57.
    发明授权
    System variation adaption for feed-forward controller 有权
    前馈控制器的系统变化适应

    公开(公告)号：US09441519B2

    公开(公告)日：2016-09-13

    申请号：US14302338

    申请日：2014-06-11

    Applicant: Cummins, Inc.

    Inventor： Michael Haas ,  Phanindra V. Garimella ,  Ming-Feng Hsieh

    IPC: F01N3/00 ,  F01N3/20 ,  F01N9/00

    CPC classification number: F01N3/208 ,  F01N9/005 ,  F01N2560/026 ,  F01N2900/0404 ,  F01N2900/0411 ,  F01N2900/0601 ,  F01N2900/1402 ,  F01N2900/1411 ,  F01N2900/1602 ,  F01N2900/1621 ,  Y02T10/24 ,  Y02T10/47

    Abstract: Methods for adapting system variation for an engine system having an after-treatment system. Measured characteristics of the after-treatment system may be used to predict a model value(s) that is compared to a measured value(s) of the after-treatment system to provide a comparison value. Information relating to high frequency uncertainties in characteristics of the after-treatment system are removed from the comparison value to provide an estimated system variation value. The estimated system variation value may then be used to adapt a system command of a controller. Further, information relating to high frequency uncertainties in characteristics of the after-treatment system may be used by a feed-back controller to determine high frequency adaptation values that may also be used to adjust the system command. The inclusion of the estimated system variation may eliminate reliance on the feed-back controller to provide system adjustments for both high and low frequency uncertainties.

    Abstract translation: 适用于具有后处理系统的发动机系统的系统变化的方法。 后处理系统的测量特征可以用于预测与后处理系统的测量值进行比较以提供比较值的模型值。 关于后处理系统的特性的高频不确定性的信息从比较值中除去，以提供估计的系统变化值。 然后可以使用估计的系统变化值来适应控制器的系统命令。 此外，与后处理系统的特性中的高频不确定性相关的信息可由反馈控制器用于确定也可用于调整系统命令的高频适配值。 包括估计的系统变化可以消除对反馈控制器的依赖，以提供高频和低频不确定性的系统调整。

    TECHNIQUES FOR CONTROL OF AN SCR AFTERTREATMENT SYSTEM
    58.
    发明申请
    TECHNIQUES FOR CONTROL OF AN SCR AFTERTREATMENT SYSTEM 有权
    用于控制可控硅后处理系统的技术

    公开(公告)号：US20150226102A1

    公开(公告)日：2015-08-13

    申请号：US14179887

    申请日：2014-02-13

    Applicant: Cummins Inc.

    Inventor： Ming-Feng Hsieh ,  Michael Haas ,  Phanindra V. Garimella

    IPC: F01N3/20 ,  B01D53/94

    CPC classification number: F01N3/208 ,  B01D53/9418 ,  B01D53/9495 ,  B01D2251/2062 ,  F01N3/106 ,  F01N11/00 ,  F01N2560/026 ,  F01N2560/14 ,  F01N2610/02 ,  F01N2610/146 ,  Y02T10/24 ,  Y02T10/47

    Abstract: A selective catalytic reduction (SCR) catalyst is disposed in an exhaust gas system of an internal combustion engine. A reductant injector is coupled to the exhaust gas stream at a position upstream of the SCR catalyst, and first and second NOx sensors provide NOx measurements upstream of and downstream of the SCR catalyst, respectively. A system and method is disclosed for operating the system to determine a NOx amount and/or a NH3 slip amount downstream of the SCR catalyst by decoupling NOx-NH3 measurements from the output of the second NOx sensor to provide control of the reductant injection amount.

    Abstract translation: 选择性催化还原（SCR）催化剂设置在内燃机的排气系统中。 还原剂喷射器在SCR催化剂上游的位置与废气流相连，第一和第二NOx传感器分别在SCR催化剂的上游和下游提供NOx测量。 公开了一种系统和方法，用于操作该系统以通过从第二NOx传感器的输出中分离NOx-NH 3测量值来确定还原剂喷射量的控制来确定SCR催化剂下游的NOx量和/或NH3滑移量。

    Control techniques for an SCR aftertreatment system
    59.
    发明授权
    Control techniques for an SCR aftertreatment system 有权
    SCR后处理系统的控制技术

    公开(公告)号：US08834821B2

    公开(公告)日：2014-09-16

    申请号：US14069639

    申请日：2013-11-01

    Applicant: Cummins Inc.

    Inventor： Mert Geveci ,  Andrew Osburn ,  Michael Haas

    IPC: B01D53/94 ,  F01N3/18 ,  F01N3/20 ,  G05B19/00 ,  F01N9/00

    CPC classification number: B01D53/9495 ,  F01N3/208 ,  F01N9/00 ,  F01N2560/026 ,  F01N2900/1402 ,  F01N2900/1806 ,  Y02T10/24 ,  Y02T10/47

    Abstract: A method includes providing: a selective catalytic reduction (SCR) catalyst disposed in an exhaust gas stream of an internal combustion engine, a reagent injector operationally coupled to the exhaust gas stream at a position upstream of the SCR catalyst, and a NOx sensor coupled to the exhaust gas stream at a position downstream of at least a first portion of the SCR catalyst. The method includes operating an extremum seeking controller to determine a first reagent injection amount corresponding to a predetermined slope of δNOx/δANR, the δNOx/δANR determined according to the NOx sensor, providing a reagent injection command in response to the first reagent injection amount, and injecting an amount of the reagent in response to the reagent injection command.

    Abstract translation: 一种方法包括提供：设置在内燃机的排气流中的选择性催化还原（SCR）催化剂，在SCR催化剂上游位置处与废气流动作耦合的试剂注入器，以及耦合到 所述废气流在所述SCR催化剂的至少第一部分的下游位置处。 该方法包括操作极值寻求控制器以确定对应于δNOx/δANR的预定斜率的第一试剂注入量，根据NOx传感器确定的δNOx/δANR，响应于第一试剂注入量提供试剂注入命令， 以及响应于试剂注入命令注入一定量的试剂。

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