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    Method for operating an SCR catalyic converter provided for the aftertreatment of exhaust gases of an internal combustion engine
    1.
    发明授权
    Method for operating an SCR catalyic converter provided for the aftertreatment of exhaust gases of an internal combustion engine 有权
    用于操作用于内燃机废气后处理的SCR催化转化器的方法

    公开(公告)号：US09097160B2

    公开(公告)日：2015-08-04

    申请号：US13954159

    申请日：2013-07-30

    申请人： Robert Bosch GmbH

    发明人： Frank Schweizer

    IPC分类号： F01N3/00 ,  F01N3/10 ,  F01N3/20

    CPC分类号： F01N3/10 ,  F01N3/208 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2900/0418 ,  F01N2900/1402 ,  F01N2900/1616 ,  F01N2900/1622 ,  Y02T10/24

    摘要： In a method for operating an SCR catalytic converter provided for the reduction of NOx in exhaust gases of an internal combustion engine, which SCR catalytic converter is operated with a reagent which can be stored in the SCR catalytic converter such that there is a certain reagent fill level in the SCR catalytic converter, wherein the actual NOx concentration downstream of the SCR catalytic converter is monitored on the basis of the signal of a sensor, which is arranged downstream of the SCR catalytic converter and which is sensitive at least with respect to NOx, in comparison with a calculated NOx concentration downstream of the SCR catalytic converter, it is provided according to the invention that, in the case of a comparison result which represents a conversion deficit as a difference between the measured actual NOx concentration and the previous calculated reagent fill level in the SCR catalytic converter is corrected to a new calculated reagent fill level, whereby an immediate dosing of reagent takes place.

    摘要翻译： 在用于操作SCR催化转化器的方法中，所述SCR催化转化器用于减少内燃机废气中的NOx，该SCR催化转化器用可存储在SCR催化转化器中的试剂进行操作，使得存在某种试剂填充 其中SCR催化转化器下游的实际NOx浓度基于传感器的信号进行监测，传感器的信号布置在SCR催化转化器的下游并且至少相对于NOx敏感， 与SCR催化转化器下游的计算的NOx浓度相比，根据本发明，在比较结果表示作为测量的实际NOx浓度与先前计算的试剂填充量之间的差异的转化赤字的情况下 SCR催化转化器中的水平被校正到新的计算试剂填充水平，由此立即d 发生试剂的发生。

    METHOD FOR CONTROLLING AN SCR CATALYTIC CONVERTER
    5.
    发明申请
    METHOD FOR CONTROLLING AN SCR CATALYTIC CONVERTER 有权

    公开(公告)号：US20210189935A1

    公开(公告)日：2021-06-24

    申请号：US17128623

    申请日：2020-12-21

    申请人： Robert Bosch GmbH

    发明人： Frank Schweizer

    IPC分类号： F01N3/20

    摘要： A method for controlling an SCR catalytic converter (20, 30), comprising detecting (200) concentration values (314, 324; 414, 424) in the exhaust gas downstream of the catalytic converter (20), wherein at least one concentration value for NH3 and one concentration value for NOx is detected; calculating (202) modeled concentration values (316, 322; 416, 422) for NH3 and NOx downstream of the catalytic converter on the basis of a catalytic converter model, wherein the model comprises an aging parameter (342, 442) which at least partially describes aging of the modeled catalytic converter; comparing (208) the detected concentration values with the modeled concentration values; and, in a manner dependent on the result of the comparison, changing the aging parameter (342, 442) of the model and/or changing a predefined dosing quantity for a reducing agent in the SCR catalytic converter.

    Method for controlling an SCR catalytic converter
    6.
    发明授权
    Method for controlling an SCR catalytic converter 有权

    公开(公告)号：US10920638B2

    公开(公告)日：2021-02-16

    申请号：US16246610

    申请日：2019-01-14

    申请人： Robert Bosch GmbH

    发明人： Frank Schweizer

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

    摘要： The invention concerns a method for controlling an SCR catalytic converter. A first modelled level of ammonia (NH3_mod1) and a second modelled level of ammonia (NH3_mod2) of the SCR catalytic converter are determined from two different models. The second modelled level of ammonia (NH3_mod2) is assessed by comparing it with the first modelled level of ammonia (NH3_mod1).

    Method for controlling an SCR catalytic converter
    7.
    发明授权
    Method for controlling an SCR catalytic converter 有权

    公开(公告)号：US11306638B2

    公开(公告)日：2022-04-19

    申请号：US17128623

    申请日：2020-12-21

    申请人： Robert Bosch GmbH

    发明人： Frank Schweizer

    IPC分类号： F01N3/20

    摘要： A method for controlling an SCR catalytic converter (20, 30), comprising detecting (200) concentration values (314, 324; 414, 424) in the exhaust gas downstream of the catalytic converter (20), wherein at least one concentration value for NH3 and one concentration value for NOx is detected; calculating (202) modeled concentration values (316, 322; 416, 422) for NH3 and NOx downstream of the catalytic converter on the basis of a catalytic converter model, wherein the model comprises an aging parameter (342, 442) which at least partially describes aging of the modeled catalytic converter; comparing (208) the detected concentration values with the modeled concentration values; and, in a manner dependent on the result of the comparison, changing the aging parameter (342, 442) of the model and/or changing a predefined dosing quantity for a reducing agent in the SCR catalytic converter.

    METHOD FOR OPERATING AN SCR CATALYIC CONVERTER PROVIDED FOR THE AFTERTREATMENT OF EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE
    10.
    发明申请
    METHOD FOR OPERATING AN SCR CATALYIC CONVERTER PROVIDED FOR THE AFTERTREATMENT OF EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE 有权
    用于内燃机排气的后处理的SCR催化转化器的运行方法

    公开(公告)号：US20140033682A1

    公开(公告)日：2014-02-06

    申请号：US13954159

    申请日：2013-07-30

    申请人： Robert Bosch GmbH

    发明人： Frank Schweizer

    IPC分类号： F01N3/10

    CPC分类号： F01N3/10 ,  F01N3/208 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2900/0418 ,  F01N2900/1402 ,  F01N2900/1616 ,  F01N2900/1622 ,  Y02T10/24

    摘要： In a method for operating an SCR catalytic converter provided for the reduction of NOx in exhaust gases of an internal combustion engine, which SCR catalytic converter is operated with a reagent which can be stored in the SCR catalytic converter such that there is a certain reagent fill level in the SCR catalytic converter, wherein the actual NOx concentration downstream of the SCR catalytic converter is monitored on the basis of the signal of a sensor, which is arranged downstream of the SCR catalytic converter and which is sensitive at least with respect to NOx, in comparison with a calculated NOx concentration downstream of the SCR catalytic converter, it is provided according to the invention that, in the case of a comparison result which represents a conversion deficit as a difference between the measured actual NOx concentration and the previous calculated reagent fill level in the SCR catalytic converter is corrected to a new calculated reagent fill level, whereby an immediate dosing of reagent takes place.

    摘要翻译： 在用于操作SCR催化转化器的方法中，所述SCR催化转化器用于减少内燃机废气中的NOx，该SCR催化转化器用可存储在SCR催化转化器中的试剂进行操作，使得存在某种试剂填充 其中SCR催化转化器下游的实际NOx浓度基于传感器的信号进行监测，传感器的信号布置在SCR催化转化器的下游并且至少相对于NOx敏感， 与SCR催化转化器下游的计算的NOx浓度相比，根据本发明，在比较结果表示作为测量的实际NOx浓度与先前计算的试剂填充量之间的差异的转化赤字的情况下 SCR催化转化器中的水平被校正到新的计算试剂填充水平，由此立即d 发生试剂的发生。