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21. 发明申请

US20070137181A1 Exhaust gas aftertreatment systems 审中-公开
标题翻译：废气后处理系统
公开(公告)号：US20070137181A1
公开(公告)日：2007-06-21
申请号：US11303291
申请日：2005-12-16
申请人： Devesh Upadhyay , Michiel Nieuwstadt
发明人： Devesh Upadhyay , Michiel Nieuwstadt
IPC分类号： F01N3/00
CPC分类号： F01N3/208 , F01N3/0253 , F01N3/035 , F01N9/005 , F01N11/002 , F01N13/009 , F01N2550/02 , F01N2560/021 , F01N2560/026 , F01N2570/18 , F01N2610/02 , F02D41/027 , F02D41/146 , F02D2041/1468 , F02D2200/0802 , Y02T10/24 , Y02T10/47
摘要： A method are presented for monitoring an amount of ammonia stored in a urea-based SCR catalyst based on a response of a sensor coupled downstream of the catalyst to a periodic desorbtion of a small amount of ammonia. The sensor could be an ammonia sensor, or a NOx sensor whose signal is sensitive to presence of both NOx and ammonia. The method can be performed at engine start to establish initial ammonia storage amount, or, alternatively, to adjust ammonia storage amounts or diagnose degradation when NOx conversion efficiency of the catalyst is below a predetermined value.
摘要翻译：提出了一种用于基于耦合在催化剂下游的传感器对少量氨的周期性解吸的响应来监测储存在基于尿素的SCR催化剂中的氨的量的方法。传感器可以是一个氨传感器，或一个NOx传感器，其信号对NOx和氨的存在都是敏感的。该方法可以在发动机启动时进行，以建立初始氨储存量，或者，当催化剂的NOx转化效率低于预定值时，可以调节氨储存量或诊断降解。

22. 发明授权

US06701707B1 Exhaust emission diagnostics 有权
标题翻译：废气排放诊断
公开(公告)号：US06701707B1
公开(公告)日：2004-03-09
申请号：US10064956
申请日：2002-09-04
申请人： Devesh Upadhyay , Christopher John Mazur
发明人： Devesh Upadhyay , Christopher John Mazur
IPC分类号： F01N300
CPC分类号： F01N3/208 , F01N11/00 , F01N13/009 , F01N2550/02 , F01N2560/026 , F01N2560/06 , F01N2570/14 , F01N2610/02 , F01N2610/03 , F01N2610/146 , F01N2900/1402 , F02D41/0275 , F02D41/1441 , F02D41/1446 , F02D41/1463 , F02D41/3827 , F02D2200/0406 , Y02A50/2325 , Y02A50/2344 , Y02T10/24 , Y02T10/47
摘要： A diesel engine emission control system uses an upstream oxidation catalyst and a downstream SCR catalyst to reduce NOx in a lean exhaust gas environment. The engine and upstream oxidation catalyst are configured to provide approximately a 1:1 ratio of NO to NO2 entering the downstream catalyst. In this way, the downstream catalyst is insensitive to sulfur contamination, and also has improved overall catalyst NOx conversion efficiency. Degradation of the system is determined when the ratio provided is no longer near the desired 1:1 ratio. This condition is detected using measurements of engine operating conditions such as from a NOx sensor located downstream of the catalysts. Finally, control action to adjust an injected amount of reductant in the exhaust gas based on the actual NO to NO2 ratio upstream of the SCR catalyst and downstream of the oxidation catalyst.
摘要翻译：柴油发动机排放控制系统使用上游氧化催化剂和下游SCR催化剂来减少贫排气环境中的NOx。发动机和上游氧化催化剂被配置为提供进入下游催化剂的NO与NO 2的大约1:1的比例。以这种方式，下游催化剂对硫污染不敏感，并且还具有改善的总体催化剂NOx转化效率。当所提供的比例不再接近所需的1：1比率时，系统的降级是确定的。使用发动机操作条件的测量来检测这种情况，例如来自位于催化剂下游的NOx传感器。最后，根据SCR催化剂的上游和氧化催化剂的下游的实际NO-NO2比例，调节废气中还原剂的注入量的控制动作。

23. 发明申请

US20120180461A1 Reductant Storage Sensing System and Method 有权
标题翻译：还原剂储存检测系统及方法
公开(公告)号：US20120180461A1
公开(公告)日：2012-07-19
申请号：US13431367
申请日：2012-03-27
申请人： David John Kubinski , Devesh Upadhyay
发明人： David John Kubinski , Devesh Upadhyay
IPC分类号： F01N3/18 , G01R27/00
CPC分类号： B01D53/9431 , B01D53/9495 , F01N3/206 , F01N3/208 , F01N13/009 , F01N2240/16 , F01N2510/063 , F01N2550/03 , F01N2560/021 , F01N2560/14 , F01N2570/18 , F01N2610/02 , F01N2900/0418 , F01N2900/1622 , Y02T10/24
摘要： A catalyst supported on a substrate includes a heater embedded in a sub-region of the substrate to heat a local region of the catalyst. The amount of ammonia stored on the catalyst may be determined and controlled through conductivity measurements in the locally heated portion of the system described.
摘要翻译：负载在基板上的催化剂包括嵌入在基板的子区域中以加热催化剂的局部区域的加热器。可以通过所述系统的局部加热部分中的电导率测量来确定和控制存储在催化剂上的氨的量。

24. 发明授权

US07418816B2 Exhaust gas aftertreatment systems 有权
标题翻译：废气后处理系统
公开(公告)号：US07418816B2
公开(公告)日：2008-09-02
申请号：US11217999
申请日：2005-09-01
申请人： Devesh Upadhyay , David J. Kubinski
发明人： Devesh Upadhyay , David J. Kubinski
IPC分类号： F01N3/00
CPC分类号： F01N3/2026 , F01N3/208 , F01N9/00 , F01N2560/021 , F01N2560/026 , F01N2610/02 , F01N2610/06 , Y02A50/2325 , Y02T10/24 , Y02T10/26 , Y02T10/47
摘要： A method is presented for determining an amount of reductant stored in the catalyst by intrusively desorbing a portion of reductant and monitoring the response of a reductant sensor to the desorbed portion. The desorbtion can be performed at vehicle start-up to determine initial storage amount and to adjust reductant injection accordingly to achieve optimum storage. Additionally, a portion of reductant can be desorbed when NOx conversion efficiency of the catalyst is reduced in order to diagnose the component responsible for system degradation.
摘要翻译：提出了一种用于通过将一部分还原剂和一种还原剂传感器对解吸部分的响应进行静力解吸来确定存储在催化剂中的还原剂的量的方法。可以在车辆启动时执行解吸，以确定初始储存量，并相应地调节还原剂注入以实现最佳的储存。此外，当催化剂的NOx转化效率降低以便诊断负责系统降解的组分时，一部分还原剂可以解吸。

25. 发明申请

US20070044457A1 Exhaust gas aftertreatment systems 有权
标题翻译：废气后处理系统
公开(公告)号：US20070044457A1
公开(公告)日：2007-03-01
申请号：US11217999
申请日：2005-09-01
申请人： Devesh Upadhyay , David Kubinski
发明人： Devesh Upadhyay , David Kubinski
IPC分类号： F01N3/10 , F01N3/00
CPC分类号： F01N3/2026 , F01N3/208 , F01N9/00 , F01N2560/021 , F01N2560/026 , F01N2610/02 , F01N2610/06 , Y02A50/2325 , Y02T10/24 , Y02T10/26 , Y02T10/47
摘要： A method is presented for determining an amount of reductant stored in the catalyst by intrusively desorbing a portion of reductant and monitoring the response of a reductant sensor to the desorbed portion. The desorbtion can be performed at vehicle start-up to determine initial storage amount and to adjust reductant injection accordingly to achieve optimum storage. Additionally, a portion of reductant can be desorbed when NOx conversion efficiency of the catalyst is reduced in order to diagnose the component responsible for system degradation.
摘要翻译：提出了一种用于通过将一部分还原剂和一种还原剂传感器对解吸部分的响应进行静力解吸来确定存储在催化剂中的还原剂的量的方法。可以在车辆启动时执行解吸，以确定初始储存量，并相应地调节还原剂注入以实现最佳的储存。此外，当催化剂的NOx转化效率降低以便诊断负责系统降解的组分时，一部分还原剂可以解吸。

26. 发明申请

US20050198942A1 Exhaust gas aftertreatment systems 审中-公开
标题翻译：废气后处理系统
公开(公告)号：US20050198942A1
公开(公告)日：2005-09-15
申请号：US11125055
申请日：2005-05-09
申请人： Michiel van Nieuwstadt , William Ruona , Devesh Upadhyay
发明人： Michiel van Nieuwstadt , William Ruona , Devesh Upadhyay
IPC分类号： F01N3/00 , F01N3/08 , F01N3/10 , F01N3/20 , F01N13/02
CPC分类号： F01N3/2006 , F01N3/0814 , F01N3/0821 , F01N3/0835 , F01N3/0842 , F01N3/2033 , F01N13/009 , F01N2610/02 , F01N2610/03 , Y02T10/24 , Y02T10/26
摘要： A system for effective NOx control in a diesel or other lean burn internal combustion engine is presented. The system includes a urea-based SCR catalyst having an oxidation catalyst coupled upstream of it and an ALNC coupled upstream of the oxidation catalyst. This system configuration results in improved NOx conversion due to faster SCR catalyst warm-up and higher operating temperatures. Additionally, placing the ALNC upstream of the oxidation catalyst prevents hydrocarbon slip into the SCR catalyst at low exhaust gas temperatures. Also, system reliability is improved by adding an auxiliary NOx aftertreatment device.
摘要翻译：提出了一种用于柴油或其他贫燃内燃机中有效NOx控制的系统。该系统包括具有耦合在其上游的氧化催化剂和耦合在氧化催化剂上游的ALNC的基于尿素的SCR催化剂。该系统配置导致由于更快的SCR催化剂预热和更高的操作温度而改进的NOx转化。此外，将ALNC放置在氧化催化剂上游可防止碳氢化合物在低废气温度下滑入SCR催化剂。此外，通过添加辅助NOx后处理装置来提高系统的可靠性。

27. 发明申请

US20050103000A1 DIAGNOSIS OF A UREA SCR CATALYTIC SYSTEM 有权
标题翻译：尿素SCR催化系统的诊断
公开(公告)号：US20050103000A1
公开(公告)日：2005-05-19
申请号：US10716137
申请日：2003-11-19
申请人： Michiel Nieuwstadt , Devesh Upadhyay
发明人： Michiel Nieuwstadt , Devesh Upadhyay
IPC分类号： F01N3/00 , F01N3/035 , F01N3/08 , F01N3/10 , F01N3/20 , F01N11/00 , F01N13/02 , F02D41/14 , G01N27/417
CPC分类号： F01N3/208 , F01N3/035 , F01N3/0871 , F01N3/103 , F01N11/00 , F01N13/009 , F01N2550/00 , F01N2550/05 , F01N2610/02 , F01N2610/03 , F01N2900/14 , F01N2900/1402 , F02D41/1441 , F02D41/146 , F02D41/1495 , F02D41/222 , G01N27/4175 , Y02T10/24 , Y02T10/40 , Y02T10/47
摘要： A method for diagnosing degradation in a pair of NOx sensors coupled upstream and downstream of a NOx catalyst is presented. The method is performed when catalyst temperature is such that its NOx conversion efficiency is substantially zero, such as when the catalyst temperature is very low (at cold start) or very high (e.g., following regeneration). Under those conditions, sensor degradation can be diagnosed if the upstream and downstream NOx sensor readings are not substantially the same.
摘要翻译：提出了一种用于诊断在NOx催化剂的上游和下游耦合的一对NOx传感器中的劣化的方法。当催化剂温度使得其NOx转化效率基本上为零时，例如当催化剂温度非常低（在冷启动时）或非常高（例如再生）时，执行该方法。在这些条件下，如果上游和下游NOx传感器读数基本不相同，则可以诊断传感器降解。

28. 发明授权

US08141347B2 Reductant storage sensing system and method 有权
标题翻译：减排存储传感系统及方法
公开(公告)号：US08141347B2
公开(公告)日：2012-03-27
申请号：US11681105
申请日：2007-03-01
申请人： David John Kubinski , Devesh Upadhyay
发明人： David John Kubinski , Devesh Upadhyay
IPC分类号： F01N3/00
CPC分类号： B01D53/9431 , B01D53/9495 , F01N3/206 , F01N3/208 , F01N13/009 , F01N2240/16 , F01N2510/063 , F01N2550/03 , F01N2560/021 , F01N2560/14 , F01N2570/18 , F01N2610/02 , F01N2900/0418 , F01N2900/1622 , Y02T10/24
摘要： A catalyst supported on a substrate includes a heater embedded in a sub-region of the substrate to heat a local region of the catalyst. The amount of ammonia stored on the catalyst may be determined and controlled through conductivity measurements in the the locally heated portion of the system described.
摘要翻译：负载在基板上的催化剂包括嵌入在基板的子区域中以加热催化剂的局部区域的加热器。存储在催化剂上的氨的量可以通过所述系统的局部加热部分中的电导率测量来确定和控制。

29. 发明申请

US20070044456A1 Exhaust gas aftertreatment systems 审中-公开
标题翻译：废气后处理系统
公开(公告)号：US20070044456A1
公开(公告)日：2007-03-01
申请号：US11217939
申请日：2005-09-01
申请人： Devesh Upadhyay , David Kubinski
发明人： Devesh Upadhyay , David Kubinski
IPC分类号： F01N3/00 , F01N3/10
CPC分类号： F01N3/208 , B01D53/9409 , B01D53/9495 , B01D2251/2062 , B01D2258/012 , F01N3/0253 , F01N3/106 , F01N3/2026 , F01N11/002 , F01N13/009 , F01N13/0093 , F01N13/0097 , F01N2340/00 , F01N2550/02 , F01N2560/021 , F01N2560/026 , F01N2560/06 , F01N2560/14 , F01N2570/18 , F01N2610/02 , F01N2900/1622 , Y02A50/2325 , Y02T10/24 , Y02T10/26 , Y02T10/47
摘要： A method is presented for determining an amount of reductant stored in the catalyst by intrusively desorbing a portion of reductant and monitoring the response of an reductant sensor to the desorbed portion. The desorbtion can be performed at vehicle start-up to determine initial storage amount and to adjust reductant injection accordingly to achieve optimum storage. Additionally, a portion of reductant can be desorbed when NOx conversion efficiency of the catalyst is reduced in order to diagnose the component responsible for system degradation.
摘要翻译：提出了一种通过将一部分还原剂和一种还原剂传感器对解吸部分的响应进行静力解吸来确定存储在催化剂中的还原剂的量的方法。可以在车辆启动时执行解吸，以确定初始储存量，并相应地调节还原剂注入以实现最佳的储存。此外，当催化剂的NOx转化效率降低以便诊断负责系统降解的组分时，一部分还原剂可以解吸。

30. 发明授权

US07134273B2 Exhaust emission control and diagnostics 有权
标题翻译：废气排放控制和诊断
公开(公告)号：US07134273B2
公开(公告)日：2006-11-14
申请号：US10064957
申请日：2002-09-04
申请人： Christopher John Mazur , Devesh Upadhyay
发明人： Christopher John Mazur , Devesh Upadhyay
IPC分类号： F01N3/00
CPC分类号： F01N3/208 , B01D53/9454 , B01D53/9495 , F01N13/009 , F01N2610/02 , F01N2610/03 , F01N2900/0411 , F01N2900/14 , Y02T10/22 , Y02T10/24
摘要： A diesel engine emission control system uses an upstream oxidation catalyst and a downstream SCR catalyst to reduce NOx in a lean exhaust gas environment. The engine and upstream oxidation catalyst are configured to provide approximately a 1:1 ratio of NO to NO2 entering the downstream catalyst. In this way, the downstream catalyst is insensitive to sulfur contamination, and also has improved overall catalyst NOx conversion efficiency. Degradation of the system is determined when the ratio provided is no longer near the desired 1:1 ratio. This condition is detected using measurements of engine operating conditions such as from a NOx sensor located downstream of the catalysts. Finally, control action to adjust an injected amount of reductant in the exhaust gas based on the actual NO to NO2 ratio upstream of the SCR catalyst and downstream of the oxidation catalyst.
摘要翻译：柴油发动机排放控制系统使用上游氧化催化剂和下游SCR催化剂来减少贫排气环境中的NOx。发动机和上游氧化催化剂被配置为提供进入下游催化剂的NO与NO 2的大约1:1的比例。以这种方式，下游催化剂对硫污染不敏感，并且还具有改善的总体催化剂NOx转化效率。当所提供的比例不再接近所需的1：1比率时，系统的降级是确定的。使用发动机操作条件的测量来检测这种情况，例如来自位于催化剂下游的NOx传感器。最后，根据SCR催化剂的上游和氧化催化剂的下游的实际NO-NO2比，调节废气中还原剂的注入量的控制动作。

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