公开(公告)号：US09482128B2

公开(公告)日：2016-11-01

申请号：US14116754

申请日：2012-05-09

Applicant: Stephan Eckhoff ,  Stefan Franoschek ,  Frank Adam

Inventor： Stephan Eckhoff ,  Stefan Franoschek ,  Frank Adam

IPC: F01N3/20 ,  F01N3/10 ,  F01N3/08 ,  F02D41/00 ,  F02D41/02 ,  F02D41/04 ,  F02D41/12 ,  F02B37/00

CPC classification number: F01N3/10 ,  F01N3/0821 ,  F01N3/0885 ,  F01N2240/36 ,  F02B37/00 ,  F02D41/0055 ,  F02D41/0275 ,  F02D41/028 ,  F02D41/042 ,  F02D41/12 ,  F02D2041/0022 ,  F02M26/05 ,  F02M26/06 ,  Y02A50/2325 ,  Y02T10/20 ,  Y02T10/22 ,  Y02T10/47

Abstract: The invention relates to a method for regenerating nitrogen oxide storage catalytic converters and to a correspondingly adapted exhaust-gas purification system for lean-burn engines. In particular, the present invention relates to the regeneration of nitrogen oxide storage catalytic converters during special driving situations of the vehicle.

Abstract translation: 本发明涉及一种用于再生氮氧化物储存催化转化器的方法，以及用于稀薄燃烧发动机的相应适用的废气净化系统。 特别地，本发明涉及在车辆的特殊驾驶状态期间氮氧化物储存催化转化器的再生。

公开(公告)号：US08512658B2

公开(公告)日：2013-08-20

申请号：US13639424

申请日：2011-04-05

Applicant: Stephan Eckhoff ,  Frank Adam ,  Christian Lammarck

Inventor： Stephan Eckhoff ,  Frank Adam ,  Christian Lammarck

IPC: B01D53/94 ,  F01N3/10 ,  F01N3/20

CPC classification number: F01N3/0814 ,  B01D53/9422 ,  B01D53/9427 ,  B01D53/9477 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/9155 ,  F01N3/0842 ,  F01N3/0878 ,  F01N3/0885 ,  F01N13/009 ,  F01N2570/145 ,  Y02A50/2344 ,  Y02C20/10 ,  Y02T10/22

Abstract: The present invention relates to a method for exhaust gas after-treatment for essentially lean-burn internal combustion engines and also a corresponding advantageous exhaust gas after-treatment system. In particular, the present invention relates to reducing the proportion of the greenhouse gas N20 in the total exhaust gas from a corresponding internal combustion system using at least one NOx storage catalyst as exhaust gas purification element. The objective of the invention is to operate the N20 depletion catalyst located downstream of the NOx storage catalyst under lambda=

Abstract translation: 本发明涉及一种用于基本上稀燃内燃机的废气后处理方法，以及相应的有利的废气后处理系统。 特别地，本发明涉及使用至少一种作为废气净化元件的NOx储存催化剂，减少来自相应的内燃系统的总废气中的温室气体N 2 O的比例。 本发明的目的是在由NO x存储催化剂形成的N 2 O到达N 2 O耗尽催化剂的情况下，在λ= <1的条件下，操作位于NO x存储催化剂下游的N2O消耗催化剂。

公开(公告)号：US20120148464A1

公开(公告)日：2012-06-14

申请号：US13392362

申请日：2010-08-20

Applicant: Stephan Eckhoff ,  Wilfried Mueller ,  Joerg-Michael Richter ,  Stefan Franoschek ,  Martin Votsmeier

Inventor： Stephan Eckhoff ,  Wilfried Mueller ,  Joerg-Michael Richter ,  Stefan Franoschek ,  Martin Votsmeier

IPC: B01D53/94 ,  F01N3/035 ,  B23P15/00

CPC classification number: F01N3/0821 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0835 ,  F01N3/085 ,  F01N3/106 ,  F01N3/2066 ,  F01N13/009 ,  F01N13/0093 ,  F01N2250/02 ,  F01N2250/12 ,  F01N2250/14 ,  F01N2340/02 ,  F01N2510/068 ,  F01N2560/02 ,  F01N2900/1624 ,  Y02T10/24 ,  Y10T29/49345

Abstract: The present invention relates to an exhaust-gas aftertreatment system which comprises a preferably catalytically active particle filter (wall-flow filter) which is followed in turn by a throughflow monolith (flow-through monolith) which is preferably provided with a catalytically active function. Both components have the same storage functions for gaseous substances present in the exhaust gas of internal combustion engines. The system is suitable in particular for the simultaneous removal of particles and pollutants from the exhaust gas of both predominantly lean-operated internal combustion engines and also of internal combustion engines operated predominantly with a stoichiometric air/fuel mixture. Likewise described is a process for the production and the use of such a system for exhaust-gas aftertreatment.

Abstract translation: 废气后处理系统技术领域本发明涉及一种废气后处理系统，其包括优选催化活性的颗粒过滤器（壁流过滤器），其依次是通过优选具有催化活性功能的通流式整料（流通式整料）。 两种组分对内燃机废气中存在的气态物质具有相同的储存功能。 该系统特别适用于从主要是贫燃操作的内燃机的废气以及主要以化学计量的空气/燃料混合物运行的内燃机同时去除颗粒和污染物。 同样描述了用于废气后处理的这种系统的生产和使用的方法。

公开(公告)号：US20110277450A1

公开(公告)日：2011-11-17

申请号：US13121083

申请日：2009-09-21

Applicant: Ruediger Hoyer ,  Stefan Franoschek ,  Stephan Eckhoff

Inventor： Ruediger Hoyer ,  Stefan Franoschek ,  Stephan Eckhoff

IPC: F01N3/18

CPC classification number: F02D41/0275 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0871 ,  F01N9/00 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/011 ,  F01N2560/025 ,  F01N2560/026 ,  F01N2560/14 ,  F02D41/064 ,  F02D41/1441 ,  F02D41/1463 ,  Y02T10/47

Abstract: The present invention relates to a regulating strategy for a special catalytic converter for exhaust-gas aftertreatment. The catalytic converter concept is distinguished in that at least two nitrogen oxide storage catalytic converters are used in the exhaust section of a vehicle. The first, possibly close-coupled unit is followed by one or more nitrogen oxide storage catalytic converters, which are possibly situated in the underbody of the vehicle. The nitrogen oxide storage catalytic converters are then regenerated as a function of the exceedance of nitrogen oxide threshold vales downstream thereof.

Abstract translation: 本发明涉及排气后处理专用催化转化器的调节策略。 催化转化器的概念的区别在于，在车辆的排气段中使用至少两个氮氧化物储存催化转化器。 第一个可能紧密耦合的单元之后是一个或多个氮氧化物存储催化转化器，其可能位于车辆的底部。 然后，氮氧化物存储催化转化器作为其下游氮氧化物阈值超过的函数再生。

公开(公告)号：US20110271658A1

公开(公告)日：2011-11-10

申请号：US13144238

申请日：2010-01-27

Applicant: Ruediger Hoyer ,  Stephan Eckhoff ,  Thomas R. Pauly

Inventor： Ruediger Hoyer ,  Stephan Eckhoff ,  Thomas R. Pauly

IPC: F01N3/18 ,  B01J27/232 ,  B01J21/10

CPC classification number: B01J23/58 ,  B01D53/9422 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/204 ,  B01D2255/2042 ,  B01D2255/206 ,  B01D2255/40 ,  B01D2255/9022 ,  B01D2255/908 ,  B01D2255/91 ,  B01D2258/014 ,  B01J21/10 ,  B01J23/63 ,  B01J35/04 ,  B01J37/024 ,  F01N3/0814 ,  F01N2510/06 ,  Y02A50/2325

Abstract: The use of nitrogen oxide storage catalysts in a close-coupled position for the cleaning of the exhaust gases from gasoline engines with direct gasoline injection which are operated with a predominantly lean air/fuel mixture places particular demands on the thermal stability and aging stability of the catalysts to be used.A nitrogen oxide storage catalyst is provided, which is suitable for this use and has two catalytically active coatings on a support body. The lower coating applied directly to the support body has a nitrogen oxide storage function and comprises platinum as a catalytically active component applied to a homogeneous magnesium-aluminum mixed oxide in combination with a nitrogen oxide storage material, in which a nitrogen oxide storage component is likewise present applied to a homogeneous magnesium-aluminum mixed oxide. The compositions of the magnesium-aluminum mixed oxides uses are different. The second layer applied thereto is notable for three-way catalytic activity, and comprises palladium applied to aluminum oxide and barium oxide or strontium oxide, but no platinum.

Abstract translation: 在紧密联接的位置使用氮氧化物储存催化剂用于清洁来自具有主要贫空气/燃料混合物操作的直接汽油喷射的汽油发动机的废气特别要求对热稳定性和老化稳定性的特定要求 要使用的催化剂。 提供了一种氮氧化物存储催化剂，其适用于此用途，并且在支撑体上具有两个催化活性涂层。 直接施加到支撑体的下涂层具有氮氧化物存储功能，并且包含铂作为催化活性组分，其应用于均匀的镁 - 铝混合氧化物与氮氧化物存储材料的组合，其中氮氧化物存储组分同样 目前应用于均匀的镁铝混合氧化物。 镁铝混合氧化物的组成不同。 施加到其上的第二层对于三元催化活性是显着的，并且包括施加到氧化铝和氧化钡或氧化锶但不含铂的钯。

公开(公告)号：US20100233051A1

公开(公告)日：2010-09-16

申请号：US12760151

申请日：2010-04-14

Applicant: Ina GRISSTEDE ,  Friedemann ROHR ,  Stephan ECKHOFF ,  Wilfried MUELLER ,  Thomas KREUZER

Inventor： Ina GRISSTEDE ,  Friedemann ROHR ,  Stephan ECKHOFF ,  Wilfried MUELLER ,  Thomas KREUZER

IPC: B01D53/94 ,  B01J23/10 ,  B01J27/232 ,  B01J21/14 ,  B01J27/224 ,  B01J23/42

CPC classification number: B01D53/9422 ,  B01D2255/1021 ,  B01D2255/2063 ,  B01D2255/407 ,  B01D2255/9155 ,  B01J23/005 ,  B01J23/58 ,  B01J23/63 ,  B01J37/0248

Abstract: 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.

Abstract translation: 氮氧化物储存催化剂用于从主要在稀燃条件下运行的内燃机废气中除去氮氧化物。 当这些催化剂用于柴油车辆中时，在运行过程中燃料中硫含量增加导致催化剂中毒，这在低温废气条件下在高温下是可逆的。 在常规氮氧化物储存催化剂的情况下，必须获得超过600℃的温度用于脱硫。 在底部区域的具有氮氧化物储存催化剂的柴油车辆中并不总是可能的。 本发明提出了一种方法，其应用允许降低包含铂组分和至少一种氮氧化物存储材料的常规氮氧化物存储催化剂的脱硫温度。 铂的化学环境的碱性降低，而氮氧化物储存材料可以保持不变。 另外，提出了一种改进的氮氧化物储存催化剂，其脱硫温度降低，这是由于该方法的应用而产生的。 这种催化剂特别适用于柴油机废气的氮氧化物后处理。

公开(公告)号：US20100055012A1

公开(公告)日：2010-03-04

申请号：US12444304

申请日：2007-08-30

Applicant: Ina Grisstede ,  Friedemann Rohr ,  Stephan Eckhoff ,  Wilfried Mueller ,  Thomas Kreuzer

Inventor： Ina Grisstede ,  Friedemann Rohr ,  Stephan Eckhoff ,  Wilfried Mueller ,  Thomas Kreuzer

IPC: B01D53/94 ,  B01J23/42 ,  B01J23/10 ,  B01J21/06 ,  B01J27/232

CPC classification number: B01D53/9422 ,  B01D2255/1021 ,  B01D2255/2063 ,  B01D2255/407 ,  B01D2255/9155 ,  B01J23/005 ,  B01J23/58 ,  B01J23/63 ,  B01J37/0248

Abstract: 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.

公开(公告)号：US20140123630A1

公开(公告)日：2014-05-08

申请号：US14125692

申请日：2012-06-22

Applicant: Stephan Eckhoff ,  Stefan Franoschek

Inventor： Stephan Eckhoff ,  Stefan Franoschek

IPC: F01N3/10

CPC classification number: F01N3/10 ,  F01N3/035 ,  F01N3/103 ,  F01N3/2006 ,  F01N9/00 ,  F01N13/009 ,  F01N2240/36 ,  F01N2250/12 ,  F01N2430/06 ,  F01N2560/02 ,  F01N2560/14 ,  F01N2570/14 ,  F01N2610/02 ,  F01N2610/03 ,  F01N2900/08 ,  F01N2900/1402 ,  F02M26/05 ,  F02M26/06 ,  F02M26/15 ,  Y02A50/2324 ,  Y02A50/2325 ,  Y02T10/22 ,  Y02T10/26 ,  Y02T10/47

Abstract: The invention relates to a method for reactivating a system composed of an oxidation catalytic converter (5) followed by a possibly catalytically coated particle filter (6), and to a correspondingly adapted exhaust-gas purification system for lean-burn engines (1) with low pressure EGR (14). The present invention relates in particular to the reactivation of such a system during over run operation of the engine.

Abstract translation: 本发明涉及一种重新激活由氧化催化转化器（5），随后是可能催化涂覆的颗粒过滤器（6）组成的系统的方法，以及用于贫燃发动机（1）的相应适用的排气净化系统， 低压EGR（14）。 本发明特别涉及在发动机的超行驶操作期间这种系统的重新启动。

公开(公告)号：US08383544B2

公开(公告)日：2013-02-26

申请号：US12599411

申请日：2008-04-16

Applicant: Stephan Eckhoff ,  Meike Wittrock ,  Ulrich Goebel ,  Ina Grisstede ,  Ruediger Hoyer ,  Wilfried Mueller ,  Thomas Kreuzer ,  Maria Cristina Casapu ,  Jan-Dierk Grunwaldt ,  Marek Maciejewski ,  Aflons Baiker

Inventor： Stephan Eckhoff ,  Meike Wittrock ,  Ulrich Goebel ,  Ina Grisstede ,  Ruediger Hoyer ,  Wilfried Mueller ,  Thomas Kreuzer ,  Maria Cristina Casapu ,  Jan-Dierk Grunwaldt ,  Marek Maciejewski ,  Aflons Baiker

IPC: B01J23/58

CPC classification number: B01J35/002 ,  B01D53/9422 ,  B01D53/96 ,  B01D2255/2042 ,  B01D2255/2065 ,  B01J23/002 ,  B01J23/63 ,  B01J23/96 ,  B01J38/04 ,  B01J38/06 ,  B01J38/08 ,  B01J2523/00 ,  B01J2523/25 ,  B01J2523/3712 ,  B01J2523/828

Abstract: Nitrogen oxide storage catalysts are used to remove the nitrogen oxides present in the lean exhaust gas of lean-burn engines. As a result of the stress due to high temperatures in vehicle operation, they are subject to thermal aging processes which affect both the nitrogen oxide storage components and the noble metals present as catalytically active components. The present invention provides a process with which the catalytic activity of a nitrogen oxide storage catalyst which comprises, in addition to platinum as a catalytically active component, basic compounds of strontium and/or barium on a support material comprising cerium oxide, said catalytic activity being lost owing to the thermal aging process, can be at least partly restored. The two-stage process is based on the fact that strontium and/or barium compounds formed during the thermal aging with the support material, which also comprise platinum, are recycled to the catalytically active forms by controlled treatment with specific gas mixtures.

Abstract translation: 氮氧化物储存催化剂用于去除贫燃发动机的贫废气中存在的氮氧化物。 由于车辆操作中的高温引起的应力的结果，它们受到影响作为催化活性组分存在的氮氧化物存储组分和贵金属两者的热老化过程。 本发明提供了一种氮氧化物储存催化剂的催化活性的方法，除了铂作为催化活性组分之外，还包括锶和/或钡的碱性化合物在包含氧化铈的载体材料上，所述催化活性为 由于热老化过程而损失，可以至少部分恢复。 两阶段工艺是基于以下事实：在热老化期间形成的锶和/或钡化合物与支撑材料（其也包含铂）通过用特定气体混合物的控制处理再循环至催化活性形式。

公开(公告)号：US20100037597A1

公开(公告)日：2010-02-18

申请号：US12519989

申请日：2007-12-21

Applicant: Stephan Eckhoff ,  Ulrich Goebel ,  Susanne Philipp ,  Wilfried Mueller ,  Thomas Kreuzer

Inventor： Stephan Eckhoff ,  Ulrich Goebel ,  Susanne Philipp ,  Wilfried Mueller ,  Thomas Kreuzer

IPC: F01N9/00 ,  F01N3/023 ,  F01N3/10

CPC classification number: F01N3/0814 ,  F01N3/0842 ,  F01N3/0871 ,  F01N3/2073 ,  F01N13/009 ,  F01N13/0097 ,  F01N13/011 ,  F01N2570/18 ,  F01N2610/03 ,  F02D41/0082 ,  F02D41/0275 ,  Y02T10/24

Abstract: An emission control system for the cleaning of the exhaust gases of a lean burn engine with two or more cylinders comprises a first exhaust leg for the exhaust gases of a first group of cylinders and a second exhaust leg for the exhaust gases of a second group of cylinders. A nitrogen oxide storage catalyst is arranged in each exhaust leg. The two exhaust legs are combined downstream of the storage catalysts at a confluence to form a common exhaust leg. The common exhaust leg contains an SCR catalyst. The first and second groups of cylinders are each supplied alternately in periodic intervals with lean and rich air/fuel mixtures. Lean or rich exhaust gases are thus obtained in the combustion in the cylinders and released into the corresponding exhaust legs. Lean and rich exhaust gases are adjusted with respect to one another so as to result in a lean exhaust gas after the combination of the exhaust gases in the common exhaust leg. The regeneration of the storage catalysts may result in the formation of ammonia, which is stored by the SCR catalyst and reacted with nitrogen oxides which pass through the storage catalysts in an unwanted manner during the storage phases.

Abstract translation: 用于清洁具有两个或多个气缸的稀薄燃烧发动机的废气的排放控制系统包括用于第一组气缸的排气的第一排气支管和用于第二组气缸的废气的第二排气支管 气瓶。 在每个排气支管中设置氮氧化物储存催化剂。 两个排气支路在汇合处在储存催化剂的下游组合以形成共同的排气支路。 普通排气支架含有SCR催化剂。 第一组和第二组汽缸分别以稀薄和浓缩的空气/燃料混合物以周期性间隔交替供应。 因此，在气缸中的燃烧中获得精益或浓缩的废气，并将其排放到相应的排气支管中。 精益和丰富的废气相对于彼此进行调节，以便在共同排气支路中排出的废气组合之后产生贫乏的废气。 储存催化剂的再生可导致氨的形成，其由SCR催化剂储存并与在储存阶段期间以不期望的方式通过储存催化剂的氮氧化物反应。