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1. 发明申请

US20090297415A1 Method For Operating A Nitrogen Oxide Storage Catalyst In A Diesel Engine 有权
标题翻译：在柴油发动机中操作氮氧化物储存催化剂的方法
公开(公告)号：US20090297415A1
公开(公告)日：2009-12-03
申请号：US12090936
申请日：2006-10-19
申请人： Friedemann Rohr , Lutz Marc Ruwisch , Markus Koegel , Juliane Kluge , Ulrich Goebel
发明人： Friedemann Rohr , Lutz Marc Ruwisch , Markus Koegel , Juliane Kluge , Ulrich Goebel
IPC分类号： B01D53/86
CPC分类号： F01N3/0871 , Y02T10/20
摘要： A nitrogen oxide storage catalytic converter which is operated for a relatively long time at low exhaust-gas temperatures in the range between 120 and 250° C. exhibits a decreasing storage capacity as a result of incomplete regeneration at said temperatures. In order to re-establish the original storage capacity of the catalytic converter which is operated in this way, two-stage regeneration is proposed, wherein the storage catalytic converter is initially partially regenerated at the low exhaust gas temperature by means of a switch from the lean mode to the rich mode, and wherein subsequently, with rich exhaust gas again, the exhaust-gas temperature of the engine is raised into a range of between 300 and 400° C. for complete regeneration.
摘要翻译：在120-250℃的低废气温度下操作较长时间的氮氧化物储存催化转化器，由于在所述温度下的不完全再生，表现出降低的储存能力。为了重新建立以这种方式运行的催化转化器的原始储存能力，提出了两级再生，其中储存催化转化器最初在低废气温度下部分地通过从稀模式到富模式，并且随后再次具有浓排气，发动机的排气温度升高到300-400℃之间，以完全再生。

2. 发明授权

US07670577B2 Method for operating a nitrogen oxide storage catalyst in a diesel engine 有权
标题翻译：在柴油发动机中操作氮氧化物储存催化剂的方法
公开(公告)号：US07670577B2
公开(公告)日：2010-03-02
申请号：US12090936
申请日：2006-10-19
申请人： Friedemann Rohr , Lutz Marc Ruwisch , Markus Koegel , Juliane Kluge , Ulrich Goebel
发明人： Friedemann Rohr , Lutz Marc Ruwisch , Markus Koegel , Juliane Kluge , Ulrich Goebel
IPC分类号： B01D53/56 , B01D53/94
CPC分类号： F01N3/0871 , Y02T10/20
摘要： A nitrogen oxide storage catalytic converter which is operated for a relatively long time at low exhaust-gas temperatures in the range between 120 and 250° C. exhibits a decreasing storage capacity as a result of incomplete regeneration at said temperatures. In order to re-establish the original storage capacity of the catalytic converter which is operated in this way, two-stage regeneration is proposed, wherein the storage catalytic converter is initially partially regenerated at the low exhaust gas temperature by means of a switch from the lean mode to the rich mode, and wherein subsequently, with rich exhaust gas again, the exhaust-gas temperature of the engine is raised into a range of between 300 and 400° C. for complete regeneration.
摘要翻译：在120-250℃的低废气温度下操作较长时间的氮氧化物储存催化转化器，由于在所述温度下的不完全再生，表现出降低的储存能力。为了重新建立以这种方式运行的催化转化器的原始储存能力，提出了两级再生，其中储存催化转化器最初在低废气温度下部分地通过从稀模式到富模式，并且随后再次具有浓排气，发动机的排气温度升高到300-400℃之间，以完全再生。

3. 发明申请

US20080314030A1 Method for Operating a Nitrogen Oxide Storage Catalytic Converter in a Motor Vechicle with Consideration of Regional Fuel Qualities 审中-公开
标题翻译：在考虑区域燃料质量的汽车机器中操作氮氧化物储存催化转化器的方法
公开(公告)号：US20080314030A1
公开(公告)日：2008-12-25
申请号：US12158099
申请日：2006-11-22
申请人： Wilfried Mueller , Thomas Kreuzer , Ulrich Goebel , Friedemann Rohr
发明人： Wilfried Mueller , Thomas Kreuzer , Ulrich Goebel , Friedemann Rohr
IPC分类号： F01N9/00
CPC分类号： F02D41/0275 , F01N3/0814 , F01N3/0842 , F01N3/0885 , F01N9/00 , F01N11/00 , F02D41/0025 , F02D41/3076 , F02D2200/701 , Y02T10/47
摘要： The fuel qualities for vehicles differ, for example, in Europe on a regional basis. This applies in particular to the sulphur content of the fuel. If vehicles with modern lean engines or with diesel engines which are equipped with nitrogen oxide storage-type catalytic converters in order to reduce the nitrogen oxide content in their exhaust gas pass through regions with a sulphur content in the fuel which is above the sulphur content which is specified for the vehicle, the engine controller will correspondingly frequently initiate desulphurization of the storage-type catalytic converter after the vehicle has been refuelled with this fuel. Any desulphurization entails an increased level of fuel consumption and greater ageing of the catalytic converter. It is proposed to avoid these adverse effects in that in lean motors the engine controller switches to stoichiometric operation in such a case, and in a diesel engine said engine controller prevents the desulphurization. The information about the region in which the vehicle is moving at a particular time can be transmitted to the engine controller by a navigation system.
摘要翻译：车辆的燃料质量在欧洲区域不同。这尤其适用于燃料的硫含量。如果配备有氮氧化物存储型催化转化器以减少其废气中的氮氧化物含量的现代精益发动机或柴油发动机的车辆通过燃料中硫含量高于硫含量的区域为车辆指定，发动机控制器将相应地频繁地启动储存型催化转化器在车辆加油之后的脱硫。任何脱硫都需要增加燃料消耗水平和催化转化器的老化。建议避免在这种情况下，在稀薄电动机中，发动机控制器切换到化学计量操作的这些不利影响，并且在柴油发动机中，所述发动机控制器防止脱硫。关于车辆在特定时间移动的区域的信息可以由导航系统发送到发动机控制器。

4. 发明授权

US07351677B2 Process for regenerating a nitrogen oxides storage catalyst 有权
标题翻译：再生氮氧化物储存催化剂的方法
公开(公告)号：US07351677B2
公开(公告)日：2008-04-01
申请号：US10630303
申请日：2003-07-29
申请人： Friedemann Rohr , Peter Kattwinkel , Stefan D. Peter , Thomas Kreuzer , Egbert Lox
发明人： Friedemann Rohr , Peter Kattwinkel , Stefan D. Peter , Thomas Kreuzer , Egbert Lox
IPC分类号： B01J20/34
CPC分类号： F02D41/0275 , B01D53/9495 , B01D53/96 , F01N3/0885 , F01N2430/06 , F01N2560/026 , Y02T10/20
摘要： The present invention provides a process and a device for regeneration of a nitrogen oxide storage catalyst in the exhaust system of a diesel engine. The process comprises a first and a second regeneration strategy. The first regeneration strategy is applied when the exhaust gas temperature is above a threshold value and comprises changing the air/fuel-ratio from a lean to a rich value during a first regeneration period. The second regeneration strategy is applied when the exhaust gas temperature is below a threshold value and comprises switching the air/fuel-ratio back and forth between lean and rich air/fuel-ratios, forming a sequence of between 2 and 10 rich pulses and between 2 and 10 lean pulses during a second regeneration period.
摘要翻译：本发明提供一种用于在柴油发动机的排气系统中再生氮氧化物存储催化剂的方法和装置。该方法包括第一和第二再生策略。当废气温度高于阈值时，应用第一再生策略，并且包括在第一再生期间将空气/燃料比从贫值改变为浓值。当废气温度低于阈值时，应用第二再生策略，并且包括在稀空燃比之间来回切换空燃比，形成富二脉冲之间的序列，介于在第二再生期间的2和10个贫脉冲。

5. 发明申请

US20130202507A1 METHOD FOR TREATING NOX IN EXHAUST GAS AND SYSTEM THEREFORE 审中-公开
标题翻译：用于处理排气中的NOX的方法和系统
公开(公告)号：US20130202507A1
公开(公告)日：2013-08-08
申请号：US12808622
申请日：2008-11-10
申请人： Stephan Echoff , Ruediger Hoyer , Susanne Philipp , Ina Grisstede , Wilfried Mueller , Friedemann Rohr
发明人： Stephan Echoff , Ruediger Hoyer , Susanne Philipp , Ina Grisstede , Wilfried Mueller , Friedemann Rohr
IPC分类号： B01D53/94
CPC分类号： B01D53/9418 , F01N3/0814 , F01N3/0871 , F01N3/2066 , F01N9/00 , F01N13/0093 , F01N2430/06 , Y02T10/22 , Y02T10/24 , Y02T10/47
摘要： The present invention relates to a method for the treatment of an exhaust gas comprising NOx, wherein the method comprises the step of subjecting the exhaust gas to an exhaust gas treatment system comprising, in order of the exhaust stream: (a) a first NOx storage catalytic converter (2, 2′); (b) a catalytic converter (3) for selective catalytic reduction (SCR) downstream of the first NOx storage catalytic converter; and (C) a catalytic converter (4) having oxygen storage capacity downstream of the SCR catalytic converter; wherein the exhaust gas treatment system is operated in alternating rich and lean phases, wherein the rich phase is terminated when the amount of reducing components leaving the first NOx storage catalytic converter is at least 0.05 times the N amount of reducing components consumed by the first NOx storage catalytic converter during the time interval beginning when the air/fuel ratio upstream of the first NOx storage catalytic converter turns from lean to rich conditions and ending when the air/fuel ratio downstream of the first NOx storage catalytic converter turns from lean to rich conditions. Optionally there can be provided a close coupled three-way or diesel oxidation or NOx storage catalytic converter (1, 1′).
摘要翻译：本发明涉及一种用于处理包含NOx的排气的方法，其中该方法包括使废气经受排气处理系统的步骤，废气处理系统按排气流的顺序包括：（a）第一NOx储存器催化转化器（2,2'）; （b）用于第一NOx存储催化转化器下游的用于选择性催化还原（SCR）的催化转化器（3）; 和（C）在SCR催化转化器的下游具有储氧能力的催化转化器（4）; 其中所述废气处理系统在富相和贫相交替的情况下操作，其中当离开所述第一NOx存储催化转化器的还原成分的量为所述第一NOx消耗的所述还原成分的N量的至少0.05倍时，所述富相停止在第一NOx存储催化转化器的上游的空气/燃料比从稀薄状态转变为富裕条件的时间间隔开始的时间间隔期间，当第一NOx存储催化转化器的下游空气/燃料比率从稀薄状态转变为富裕状态时结束。可选地，可以提供紧密耦合的三通或柴油氧化或NOx储存催化转化器（1,1'）。

6. 发明申请

US20100055012A1 NITROGEN OXIDE STORAGE CATALYST FEATURING A REDUCED DESULFURIZATION TEMPERATURE 审中-公开
公开(公告)号：US20100055012A1
公开(公告)日：2010-03-04
申请号：US12444304
申请日：2007-08-30
申请人： Ina Grisstede , Friedemann Rohr , Stephan Eckhoff , Wilfried Mueller , Thomas Kreuzer
发明人： Ina Grisstede , Friedemann Rohr , Stephan Eckhoff , Wilfried Mueller , Thomas Kreuzer
IPC分类号： B01D53/94 , B01J23/42 , B01J23/10 , B01J21/06 , B01J27/232
CPC分类号： B01D53/9422 , B01D2255/1021 , B01D2255/2063 , B01D2255/407 , B01D2255/9155 , B01J23/005 , B01J23/58 , B01J23/63 , B01J37/0248
摘要： Nitrogen oxide storage catalysts are used to remove nitrogen oxides from the exhaust gas of internal combustion engines operated predominantly under lean burn conditions. When these catalysts are used in diesel vehicles, the increased sulfur content in the fuel during operation results in poisoning of the catalyst, which is reversible at high temperatures under reduced exhaust gas conditions. In the case of conventional nitrogen oxide storage catalysts, temperatures of more than 600° C. have to be obtained for desulfurization. This is not always possible in diesel vehicles with a nitrogen oxide storage catalyst in the underbody area.The invention presents a process whose application allows the desulfurization temperature of conventional nitrogen oxide storage catalysts which comprise a platinum component and at least one nitrogen oxide storage material to be lowered. The basicity of the chemical environment of the platinum is lowered, while the nitrogen oxide storage material can remain unchanged as such. In addition, an improved nitrogen oxide storage catalyst with reduced desulfurization temperature which results from the application of the process is presented. Such catalysts are suitable particularly for nitrogen oxide aftertreatment of the exhaust gases of diesel engines.

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