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1. 发明授权

US08141340B2 Apparatus, system, and method for determining the degradation of an SCR catalyst 有权
标题翻译：用于确定SCR催化剂降解的装置，系统和方法
公开(公告)号：US08141340B2
公开(公告)日：2012-03-27
申请号：US12433600
申请日：2009-04-30
申请人： Phanindra Garimella , Joan M. Wills , John N. Chi , Neal W. Currier , Aleksey Yezerets
发明人： Phanindra Garimella , Joan M. Wills , John N. Chi , Neal W. Currier , Aleksey Yezerets
IPC分类号： F01N3/00
CPC分类号： F01N3/208 , F01N2550/02 , F01N2560/026 , F01N2610/02 , F01N2900/1402 , F01N2900/1622 , Y02T10/24
摘要： According to one representative embodiment, an apparatus for determining the degradation of a selective catalytic reduction (SCR) catalyst of an engine exhaust aftertreatment system includes a system properties module configured to store at least one system dynamics property value of the exhaust system at a first time and receive the at least one system dynamics property value of the exhaust aftertreatment system at a second time subsequent to the first time. The apparatus also includes a system dynamics module configured to determine a storage capacity of the SCR catalyst based on a comparison between the at least one system dynamic property value at the first time and the at least one system dynamic property value at the second time. Additionally, the apparatus includes an SCR catalyst degradation factor module configured to determine an SCR catalyst degradation factor based at least partially on the storage capacity of the SCR catalyst.
摘要翻译：根据一个代表性实施例，用于确定发动机排气后处理系统的选择性催化还原（SCR）催化剂的劣化的装置包括系统特性模块，其被配置为在第一时间存储排气系统的至少一个系统动力特性值并且在第一次之后的第二时间接收排气后处理系统的至少一个系统动力特性值。该装置还包括系统动力学模块，其被配置为基于第一时间的至少一个系统动态属性值与第二时间的至少一个系统动态属性值之间的比较来确定SCR催化剂的存储容量。另外，该装置包括SCR催化剂劣化因子模块，其被配置为至少部分地基于SCR催化剂的储存容量来确定SCR催化剂降解因子。

2. 发明授权

US08256208B2 Apparatus, system, and method for reducing NOx emissions on an SCR catalyst 有权
标题翻译：用于减少SCR催化剂上NOx排放的装置，系统和方法
公开(公告)号：US08256208B2
公开(公告)日：2012-09-04
申请号：US12433586
申请日：2009-04-30
申请人： Joan M. Wills , John N. Chi , Weiwen Wang , Phanindra Garimella , Timothy R. Frazier , Abdul R. Ofoli , Joe V. Hill , Lisa A. Farrell , Neal W. Currier , Aleksey Yezerets , Andy Osburn
发明人： Joan M. Wills , John N. Chi , Weiwen Wang , Phanindra Garimella , Timothy R. Frazier , Abdul R. Ofoli , Joe V. Hill , Lisa A. Farrell , Neal W. Currier , Aleksey Yezerets , Andy Osburn
IPC分类号： F01N3/00
CPC分类号： F01N3/208 , B01D53/86 , B01D2251/2067 , B01D2255/91 , B01D2258/012 , B01D2258/014 , B01D2259/4566 , F01N3/106 , F01N11/00 , F01N13/009 , F01N2550/02 , F01N2560/021 , F01N2560/026 , F01N2610/02 , Y02T10/24 , Y02T10/47
摘要： According to one representative embodiment, an apparatus for reducing NOx emissions in an engine exhaust gas stream of an engine system having a selective catalytic reduction (SCR) system with an SCR catalyst positioned downstream of a reductant injector includes a NOx reduction target module and a reductant module. The NOx reduction target module is configured to determine a NOx reduction requirement, which includes an amount of NOx in the exhaust gas stream to be reduced on the SCR catalyst. The reductant module is configured to determine the amount of reductant added to the exhaust gas stream to achieve the NOx reduction requirement. The amount of reductant added to the exhaust gas stream is a function of at least one ammonia storage characteristic of the SCR catalyst, at least one reductant-to-ammonia conversion characteristic, and a conversion capability of an AMOX catalyst in exhaust receiving communication with the SCR catalyst.
摘要翻译：根据一个代表性实施例，一种用于减少具有位于还原剂喷射器下游的具有选择性催化还原（SCR）系统的发动机系统的发动机排气流中的NOx排放的装置包括NOx还原目标模块和还原剂模块。 NOx还原目标模块被配置为确定NOx还原要求，其包括在SCR催化剂上减少的排气流中的NOx的量。还原剂模块被配置为确定添加到排气流中的还原剂的量以实现NOx还原要求。添加到废气流中的还原剂的量是SCR催化剂的至少一种氨储存特性，至少一种还原剂与氨的转化特性和在与废气中的AMOX催化剂的转化能力接触的功能 SCR催化剂。

3. 发明申请

US20100024390A1 APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST 有权
标题翻译：用于减少SCR催化剂上NOx排放的装置，系统和方法
公开(公告)号：US20100024390A1
公开(公告)日：2010-02-04
申请号：US12433586
申请日：2009-04-30
申请人： Joan M. Wills , John N. Chi , Weiwen Wang , Phanindra Garimella , Timothy R. Frazier , Abdul R. Ofoli , Joe V. Hill , Lisa A. Farrell , Neal W. Currier , Aleksey Yezerets , Andy Osburn
发明人： Joan M. Wills , John N. Chi , Weiwen Wang , Phanindra Garimella , Timothy R. Frazier , Abdul R. Ofoli , Joe V. Hill , Lisa A. Farrell , Neal W. Currier , Aleksey Yezerets , Andy Osburn
IPC分类号： F01N3/20 , F01N3/10
CPC分类号： F01N3/208 , B01D53/86 , B01D2251/2067 , B01D2255/91 , B01D2258/012 , B01D2258/014 , B01D2259/4566 , F01N3/106 , F01N11/00 , F01N13/009 , F01N2550/02 , F01N2560/021 , F01N2560/026 , F01N2610/02 , Y02T10/24 , Y02T10/47
摘要： According to one representative embodiment, an apparatus for reducing NOx emissions in an engine exhaust gas stream of an engine system having a selective catalytic reduction (SCR) system with an SCR catalyst positioned downstream of a reductant injector includes a NOx reduction target module and a reductant module. The NOx reduction target module is configured to determine a NOx reduction requirement, which includes an amount of NOx in the exhaust gas stream to be reduced on the SCR catalyst. The reductant module is configured to determine the amount of reductant added to the exhaust gas stream to achieve the NOx reduction requirement. The amount of reductant added to the exhaust gas stream is a function of at least one ammonia storage characteristic of the SCR catalyst, at least one reductant-to-ammonia conversion characteristic, and a conversion capability of an AMOX catalyst in exhaust receiving communication with the SCR catalyst.
摘要翻译：根据一个代表性实施例，一种用于减少具有位于还原剂喷射器下游的具有选择性催化还原（SCR）系统的发动机系统的发动机排气流中的NOx排放的装置包括NOx还原目标模块和还原剂模块。 NOx还原目标模块被配置为确定NOx还原要求，其包括在SCR催化剂上减少的排气流中的NOx的量。还原剂模块被配置为确定添加到排气流中的还原剂的量以实现NOx还原要求。添加到废气流中的还原剂的量是SCR催化剂的至少一种氨储存特性，至少一种还原剂与氨的转化特性和在与废气中的AMOX催化剂的转化能力接触的功能 SCR催化剂。

4. 发明申请

US20090272099A1 APPARATUS, SYSTEM, AND METHOD FOR DETERMINING THE DEGRADATION OF AN SCR CATALYST 有权
标题翻译：用于确定SCR催化剂降解的装置，系统和方法
公开(公告)号：US20090272099A1
公开(公告)日：2009-11-05
申请号：US12433600
申请日：2009-04-30
申请人： Phanindra Garimella , Joan M. Wills , John N. Chi , Neal W. Currier , Aleksey Yezerets
发明人： Phanindra Garimella , Joan M. Wills , John N. Chi , Neal W. Currier , Aleksey Yezerets
IPC分类号： F01N3/00 , F01N3/10 , F01N9/00
CPC分类号： F01N3/208 , F01N2550/02 , F01N2560/026 , F01N2610/02 , F01N2900/1402 , F01N2900/1622 , Y02T10/24
摘要： According to one representative embodiment, an apparatus for determining the degradation of a selective catalytic reduction (SCR) catalyst of an engine exhaust aftertreatment system includes a system properties module configured to store at least one system dynamics property value of the exhaust system at a first time and receive the at least one system dynamics property value of the exhaust aftertreatment system at a second time subsequent to the first time. The apparatus also includes a system dynamics module configured to determine a storage capacity of the SCR catalyst based on a comparison between the at least one system dynamic property value at the first time and the at least one system dynamic property value at the second time. Additionally, the apparatus includes an SCR catalyst degradation factor module configured to determine an SCR catalyst degradation factor based at least partially on the storage capacity of the SCR catalyst.
摘要翻译：根据一个代表性实施例，用于确定发动机排气后处理系统的选择性催化还原（SCR）催化剂的劣化的装置包括系统特性模块，其被配置为在第一时间存储排气系统的至少一个系统动力特性值并且在第一次之后的第二时间接收排气后处理系统的至少一个系统动力特性值。该装置还包括系统动力学模块，其被配置为基于第一时间的至少一个系统动态属性值与第二时间的至少一个系统动态属性值之间的比较来确定SCR催化剂的存储容量。另外，该装置包括SCR催化剂劣化因子模块，其被配置为至少部分地基于SCR催化剂的储存容量来确定SCR催化剂降解因子。

5. 发明申请

US20090272105A1 APPARATUS, SYSTEM, AND METHOD FOR REDUCING NOx EMISSIONS ON AN SCR CATALYST 有权
标题翻译：用于减少SCR催化剂上NOx排放的装置，系统和方法
公开(公告)号：US20090272105A1
公开(公告)日：2009-11-05
申请号：US12112795
申请日：2008-04-30
申请人： John N. Chi , Weiwen Wang , Phanindra Garimella , Joan M. Wills , Joe V. Hill , Lisa A. Farrell , Abdul R. Ofoli
发明人： John N. Chi , Weiwen Wang , Phanindra Garimella , Joan M. Wills , Joe V. Hill , Lisa A. Farrell , Abdul R. Ofoli
IPC分类号： F01N11/00 , F01N3/18
CPC分类号： F01N3/035 , B01D53/9409 , B01D2251/2062 , F01N3/0814 , F01N3/0821 , F01N3/0828 , F01N3/208 , F01N9/00 , F01N11/00 , F01N2560/026 , F01N2560/06 , F01N2610/02 , F01N2900/1616 , F01N2900/1622 , F02B37/164 , F02B37/18 , Y02T10/144 , Y02T10/24 , Y02T10/47
摘要： Various embodiments of an apparatus, system, and method are disclosed for reducing NOx emissions on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOx emissions in an engine exhaust includes a NOx reduction target module that is configured to determine a NOx reduction requirement that includes an amount of NOx in the exhaust gas stream to be reduced on a selective catalytic reduction (SCR) catalyst. The apparatus also includes an ammonia target module that is configured to determine an ammonia addition requirement that includes an amount of ammonia added to the exhaust gas stream to achieve the NOx reduction requirement. The apparatus also includes a reductant target module that is configured to determine a reductant injection requirement that includes an amount of reductant added to the exhaust gas stream to achieve the ammonia addition requirement. The apparatus further includes a reductant limiting module that is configured to determine whether at least one reductant limiting condition is met and to limit the amount of reductant added in response to the at least one reductant limiting condition if the at least one reductant limiting condition has been met.
摘要翻译：公开了用于减少SCR催化剂上的NOx排放的设备，系统和方法的各种实施例。例如，根据一个代表性的实施例，用于减少发动机排气中的NOx排放的装置包括NOx还原目标模块，其被配置为确定NOx还原要求，所述NOx还原要求包括在所述排气流中减少的NOx的量选择性催化还原（SCR）催化剂。该装置还包括氨目标模块，其被配置为确定包括添加到废气流中的氨的量以实现NOx降低要求的氨添加要求。该装置还包括还原剂目标模块，其被配置为确定还原剂注入要求，其包括添加到废气流中的还原剂的量以实现氨添加要求。该装置还包括还原剂限制模块，其被配置为确定是否满足至少一种还原剂限制条件，并且如果至少一种还原剂限制条件已经被限制，则限制响应于至少一种还原剂限制条件而添加的还原剂的量见面

6. 发明授权

US08225595B2 Apparatus, system, and method for estimating an NOx conversion efficiency of a selective catalytic reduction catalyst 有权
标题翻译：用于估计选择性催化还原催化剂的NOx转化效率的装置，系统和方法
公开(公告)号：US08225595B2
公开(公告)日：2012-07-24
申请号：US12632646
申请日：2009-12-07
申请人： Phanindra Garimella , Andy Osburn , John N. Chi , Joan M. Wills
发明人： Phanindra Garimella , Andy Osburn , John N. Chi , Joan M. Wills
IPC分类号： F01N3/00
CPC分类号： F01N3/208 , B01D53/9409 , B01D2255/20723 , B01D2255/20738 , B01D2255/20761 , B01D2255/50 , F01N13/0093 , F01N2550/02 , F01N2560/021 , F01N2560/026 , F01N2560/06 , F01N2900/1616 , Y02T10/24
摘要： According to one exemplary embodiment, an apparatus is disclosed for estimating an NOx conversion efficiency of an SCR catalyst. The apparatus includes a catalyst degradation module for determining an SCR catalyst degradation factor and a NOx concentration module for determining an SCR catalyst inlet NOx concentration based on an interpretation of at least one NOx detector signal. Additionally, the apparatus includes an NH3 concentration module for determining an SCR catalyst inlet NH3 concentration, a temperature module for determining an SCR catalyst bed temperature of the at least one SCR catalyst, and a space velocity (SV) module for determining an exhaust gas SV for the SCR catalyst. A NOx conversion efficiency module calculates a NOx conversion efficiency value based at least partially on the SCR catalyst degradation factor, the SCR catalyst inlet NOx concentration, the SCR catalyst inlet NH3 concentration, the exhaust gas SV, and the SCR catalyst bed temperature.
摘要翻译：根据一个示例性实施例，公开了一种用于估计SCR催化剂的NOx转化效率的装置。该装置包括用于确定SCR催化剂降解因子的催化剂降解模块和用于基于至少一个NOx检测器信号的解释来确定SCR催化剂入口NOx浓度的NOx浓度模块。此外，该装置包括用于确定SCR催化剂入口NH 3浓度的NH 3浓度模块，用于确定至少一个SCR催化剂的SCR催化剂床温度的温度模块和用于确定废气SV的空间速度（SV）模块用于SCR催化剂。 NOx转化效率模块至少部分地基于SCR催化剂劣化因子，SCR催化剂入口NOx浓度，SCR催化剂入口NH 3浓度，排气SV和SCR催化剂床温度来计算NOx转化效率值。

7. 发明授权

US08161730B2 Apparatus, system, and method for reducing NOx emissions on an SCR catalyst 有权
标题翻译：用于减少SCR催化剂上NOx排放的装置，系统和方法
公开(公告)号：US08161730B2
公开(公告)日：2012-04-24
申请号：US12112795
申请日：2008-04-30
申请人： John N. Chi , Weiwen Wang , Phanindra Garimella , Joan M. Wills , Joe V. Hill , Lisa A. Farrell , Abdul R. Ofoli
发明人： John N. Chi , Weiwen Wang , Phanindra Garimella , Joan M. Wills , Joe V. Hill , Lisa A. Farrell , Abdul R. Ofoli
IPC分类号： F01N3/00
CPC分类号： F01N3/035 , B01D53/9409 , B01D2251/2062 , F01N3/0814 , F01N3/0821 , F01N3/0828 , F01N3/208 , F01N9/00 , F01N11/00 , F01N2560/026 , F01N2560/06 , F01N2610/02 , F01N2900/1616 , F01N2900/1622 , F02B37/164 , F02B37/18 , Y02T10/144 , Y02T10/24 , Y02T10/47
摘要： Various embodiments of an apparatus, system, and method are disclosed for reducing NOx emissions on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOx emissions in an engine exhaust includes a NOx reduction target module that is configured to determine a NOx reduction requirement that includes an amount of NOx in the exhaust gas stream to be reduced on a selective catalytic reduction (SCR) catalyst. The apparatus also includes an ammonia target module that is configured to determine an ammonia addition requirement that includes an amount of ammonia added to the exhaust gas stream to achieve the NOx reduction requirement. The apparatus also includes a reductant target module that is configured to determine a reductant injection requirement that includes an amount of reductant added to the exhaust gas stream to achieve the ammonia addition requirement. The apparatus further includes a reductant limiting module that is configured to determine whether at least one reductant limiting condition is met and to limit the amount of reductant added in response to the at least one reductant limiting condition if the at least one reductant limiting condition has been met.
摘要翻译：公开了用于减少SCR催化剂上的NOx排放的设备，系统和方法的各种实施例。例如，根据一个代表性的实施例，用于减少发动机排气中的NOx排放的装置包括NOx还原目标模块，其被配置为确定NOx还原要求，所述NOx还原要求包括在所述排气流中减少的NOx的量选择性催化还原（SCR）催化剂。该装置还包括氨目标模块，其被配置为确定包括添加到废气流中的氨的量以实现NOx降低要求的氨添加要求。该装置还包括还原剂目标模块，其被配置为确定还原剂注入要求，其包括添加到废气流中的还原剂的量以实现氨添加要求。该装置还包括还原剂限制模块，其被配置为确定是否满足至少一个还原剂限制条件，并且如果至少一种还原剂限制条件已经被限制，则限制响应于至少一种还原剂限制条件而添加的还原剂的量见面

8. 发明授权

US08109079B2 Apparatus, system, and method for controlling ammonia slip from an SCR catalyst 有权
标题翻译：用于控制来自SCR催化剂的氨滑移的装置，系统和方法
公开(公告)号：US08109079B2
公开(公告)日：2012-02-07
申请号：US12112500
申请日：2008-04-30
申请人： Joan M. Wills , Phanindra Garimella , John N. Chi
发明人： Joan M. Wills , Phanindra Garimella , John N. Chi
IPC分类号： F01N3/00
CPC分类号： F01N3/208 , B01D53/9431 , B01D53/9495 , B01D2258/012 , F01N2560/021 , F01N2560/026 , F01N2610/02 , F01N2900/1616 , Y02T10/24
摘要： Various embodiments of an apparatus, system, and method are disclosed for reducing NOx emissions on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOx emissions in an engine exhaust includes a NOx reduction target module that is configured to determine a NOx reduction requirement that includes an amount of NOx in the exhaust gas stream to be reduced on a selective catalytic reduction (SCR) catalyst. The apparatus also includes an ammonia target module that is configured to determine an ammonia addition requirement that includes an amount of ammonia added to the exhaust gas stream to achieve the NOx reduction requirement. The apparatus also includes a reductant target module that is configured to determine a reductant injection requirement that includes an amount of reductant added to the exhaust gas stream to achieve the ammonia addition requirement. The apparatus further includes a reductant limiting module that is configured to determine at least one reductant limiting condition and to limit the amount of reductant added in response to the reductant limiting condition.
摘要翻译：公开了用于减少SCR催化剂上的NOx排放的设备，系统和方法的各种实施例。例如，根据一个代表性的实施例，用于减少发动机排气中的NOx排放的装置包括NOx还原目标模块，其被配置为确定NOx还原要求，所述NOx还原要求包括在所述排气流中减少的NOx的量选择性催化还原（SCR）催化剂。该装置还包括氨目标模块，其被配置为确定包括添加到废气流中的氨的量以实现NOx降低要求的氨添加要求。该装置还包括还原剂目标模块，其被配置为确定还原剂注入要求，其包括添加到废气流中的还原剂的量以实现氨添加要求。该装置还包括还原剂限制模块，其被配置为确定至少一种还原剂限制条件并限制响应于还原剂限制条件而加入的还原剂的量。

9. 发明申请

US20100242440A1 APPARATUS, SYSTEM, AND METHOD FOR ESTIMATING AN NOx CONVERSION EFFICIENCY OF A SELECTIVE CATALYTIC REDUCTION CATALYST 有权
标题翻译：用于评估选择性催化还原催化剂的NOx转化效率的装置，系统和方法
公开(公告)号：US20100242440A1
公开(公告)日：2010-09-30
申请号：US12632646
申请日：2009-12-07
申请人： Phanindra Garimella , Andy Osburn , John N. Chi , Joan M. Wills
发明人： Phanindra Garimella , Andy Osburn , John N. Chi , Joan M. Wills
IPC分类号： F01N3/10 , G06F19/00
CPC分类号： F01N3/208 , B01D53/9409 , B01D2255/20723 , B01D2255/20738 , B01D2255/20761 , B01D2255/50 , F01N13/0093 , F01N2550/02 , F01N2560/021 , F01N2560/026 , F01N2560/06 , F01N2900/1616 , Y02T10/24
摘要： According to one exemplary embodiment, an apparatus is disclosed for estimating an NOx conversion efficiency of an SCR catalyst. The apparatus includes a catalyst degradation module for determining an SCR catalyst degradation factor and a NOx concentration module for determining an SCR catalyst inlet NOx concentration based on an interpretation of at least one NOx detector signal. Additionally, the apparatus includes an NH3 concentration module for determining an SCR catalyst inlet NH3 concentration, a temperature module for determining an SCR catalyst bed temperature of the at least one SCR catalyst, and a space velocity (SV) module for determining an exhaust gas SV for the SCR catalyst. A NOx conversion efficiency module calculates a NOx conversion efficiency value based at least partially on the SCR catalyst degradation factor, the SCR catalyst inlet NOx concentration, the SCR catalyst inlet NH3 concentration, the exhaust gas SV, and the SCR catalyst bed temperature.
摘要翻译：根据一个示例性实施例，公开了一种用于估计SCR催化剂的NOx转化效率的装置。该装置包括用于确定SCR催化剂降解因子的催化剂降解模块和用于基于至少一个NOx检测器信号的解释来确定SCR催化剂入口NOx浓度的NOx浓度模块。此外，该装置包括用于确定SCR催化剂入口NH 3浓度的NH 3浓度模块，用于确定至少一个SCR催化剂的SCR催化剂床温度的温度模块和用于确定废气SV的空间速度（SV）模块用于SCR催化剂。 NOx转化效率模块至少部分地基于SCR催化剂劣化因子，SCR催化剂入口NOx浓度，SCR催化剂入口NH 3浓度，排气SV和SCR催化剂床温度来计算NOx转化效率值。

10. 发明授权

US08181450B2 Apparatus, system, and method for reducing NOx emissions on an SCR catalyst using ammonia storage and slip control 有权
标题翻译：用于使用氨储存和滑移控制来减少SCR催化剂上的NOx排放物的装置，系统和方法
公开(公告)号：US08181450B2
公开(公告)日：2012-05-22
申请号：US12112678
申请日：2008-04-30
申请人： Phanindra Garimella , Abdul R. Ofoli , Timothy R. Frazier , Joan M. Wills , John N. Chi , Weiwen Wang , Andrew Osburn
发明人： Phanindra Garimella , Abdul R. Ofoli , Timothy R. Frazier , Joan M. Wills , John N. Chi , Weiwen Wang , Andrew Osburn
IPC分类号： F01N3/20
CPC分类号： F01N3/208 , B01D53/9409 , B01D2251/2062 , F01N3/103 , F01N3/106 , F01N3/2066 , F01N13/009 , F01N2560/021 , F01N2560/026 , F01N2560/06 , F01N2560/08 , F01N2570/14 , F01N2610/02 , F01N2610/14 , F01N2900/0408 , F01N2900/0411 , F01N2900/0412 , F01N2900/1622 , F02B37/00 , Y02A50/2344 , Y02T10/24
摘要： Various embodiments of an apparatus, system, and method are disclosed for reducing NOx emissions using ammonia storage on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOx emissions in an engine exhaust includes a NOx reduction target module that is configured to determine a NOx reduction requirement. The apparatus also includes an ammonia storage module that is configured to determine an ammonia storage modifier. An ammonia target module of the apparatus is configured to determine an ammonia addition requirement. The ammonia target module is communicable in data receiving communication with the ammonia storage module to receive the ammonia storage modifier, which is added to the ammonia addition requirement. The apparatus also includes a reductant target module that is configured to determine a reductant injection requirement that includes an amount of reductant added to the exhaust gas stream to achieve the ammonia addition requirement.
摘要翻译：公开了用于使用SCR催化剂上的氨储存来减少NOx排放的装置，系统和方法的各种实施例。例如，根据一个代表性的实施例，用于减少发动机排气中的NOx排放的装置包括被配置为确定NOx降低要求的NOx还原目标模块。该装置还包括氨储存模块，其被配置成确定氨贮存改性剂。该装置的氨目标模块被配置成确定氨添加要求。氨目标模块可在与氨储存模块进行数据接收通信中进行通信，以接收氨添加要求的氨存储改性剂。该装置还包括还原剂目标模块，其被配置为确定还原剂注入要求，其包括添加到废气流中的还原剂的量以实现氨添加要求。

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