公开(公告)号：US20140090362A1

公开(公告)日：2014-04-03

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: F01N3/10

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：US08475753B2

公开(公告)日：2013-07-02

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 ,  F01N3/10 ,  F01N3/28 ,  G05B1/00

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：US08327625B2

公开(公告)日：2012-12-11

申请号：US12525190

申请日：2008-01-31

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

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

IPC: F01N3/023 ,  F01N3/10

CPC classification number: F01N3/2066 ,  F01N3/0253 ,  F01N3/033 ,  F01N3/035 ,  F01N3/0821 ,  F01N3/0842 ,  F01N3/0885 ,  F01N3/103 ,  F01N3/106 ,  F01N9/002 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/011 ,  F01N13/107 ,  F01N2250/02 ,  F01N2510/065 ,  F01N2610/02 ,  F01N2610/03 ,  F02B75/22 ,  F02D41/0245 ,  F02D41/029 ,  F02D41/405 ,  Y02A50/2325 ,  Y02A50/2345 ,  Y02T10/24 ,  Y02T10/26 ,  Y02T10/47

Abstract: To adhere to legal exhaust-gas regulations, the exhaust gases of a lean-burn engine must be freed from soot particles and nitrogen oxides. It is proposed that the cylinders of the lean-burn engine be divided into two groups which discharge their exhaust gases into two associated exhaust lines which each comprise a soot filter and which are merged at an opening-in point into a common exhaust line. The common exhaust line comprises the catalytic converter for the removal of the nitrogen oxides. By regenerating the two soot filters at different times, the exhaust-gas temperature in the common exhaust line is limited to a mean temperature between the exhaust-gas temperature of normal operation and that of regeneration operation, and the catalytic converter for the removal of the nitrogen oxides is preserved.

Abstract translation: 为遵守合法的废气法规，稀燃发动机的废气必须不含烟灰颗粒和氮氧化物。 建议将稀燃发动机的气缸分成两组，将其废气排放到两个相关联的排气管道中，每个排气管路包括烟尘过滤器，并在开口处合并成共同的排气管线。 普通排气管路包括用于除去氮氧化物的催化转化器。 通过在不同时间再生两个烟灰过滤器，共同排气管线中的废气温度被限制在正常操作的废气温度和再生操作的排气温度之间的平均温度，以及用于除去 氮氧化物被保存。

公开(公告)号：US20110120093A1

公开(公告)日：2011-05-26

申请号：US12989264

申请日：2009-03-21

Applicant: Stephan Eckhoff ,  Paul Spurk ,  Lothar Mussmann ,  Wilfried Muleller

Inventor： Stephan Eckhoff ,  Paul Spurk ,  Lothar Mussmann ,  Wilfried Muleller

IPC: F01N3/035

CPC classification number: F01N3/0231 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0821 ,  F01N3/106 ,  F01N3/2066 ,  F01N13/009 ,  F01N2610/02 ,  Y02T10/24

Abstract: The present invention relates to a process for purifying NOx-containing exhaust gases formed in an internal combustion engine. In particular, the invention is directed at the purification of exhaust gases from an engine which produces a lean-burn exhaust gas, e.g. a diesel engine or a spark-ignition engine operated under lean conditions. Furthermore, the present invention relates to an appropriately equipped exhaust gas purification apparatus. The apparatus proposes a sequence of different catalysts for purifying primary axhaust gas of lean-burn engines, in which an oxidatively active particle filter (1) is followed by an oxidation catalyst (2) and this is in turn followed by an SCR catalyst, (3c) with the latter being arranged downstream of an addition of reducing agent (3a) located downstream of the oxidation catalyst (2).

Abstract translation: 本发明涉及一种净化形成在内燃机中的含NO x废气的方法。 特别地，本发明涉及净化来自发动机的废气，其产生贫燃废气，例如， 柴油发动机或在精细条件下运行的火花点火发动机。 此外，本发明涉及适当配备的废气净化装置。 该装置提出了用于净化贫燃发动机的主要废气的不同催化剂的序列，其中氧化活性颗粒过滤器（1）之后是氧化催化剂（2），然后是SCR催化剂（ 3c），后者位于加入位于氧化催化剂（2）下游的还原剂（3a）的下游。

公开(公告)号：US20100064665A1

公开(公告)日：2010-03-18

申请号：US12520606

申请日：2007-12-19

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

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

IPC: F01N9/00 ,  F01N3/00 ,  F01N3/10

CPC classification number: F02D41/028 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0885 ,  F01N3/101 ,  F01N3/106 ,  F01N3/2033 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/04 ,  F01N13/107 ,  F01N2430/06 ,  F01N2430/08 ,  F01N2430/085 ,  F01N2560/025 ,  F01N2560/14 ,  F02D41/0082 ,  Y02T10/22 ,  Y02T10/26

Abstract: Lean burn engines require an exhaust gas system comprising nitrogen oxide storage catalysts for removal of nitrogen oxides from their exhaust gases. When the lean burn engine is operated with a sulphur-containing exhaust gas, the storage catalysts have to be desulphurized from time to time. During the desulphurization, there is the risk of high pollutant emissions. These emissions can be reduced when the cylinders of the lean burn engine are combined in two groups which release their exhaust gas to two assigned exhaust legs, in each of which is arranged at least one nitrogen oxide storage catalyst. The two exhaust legs are combined beyond the storage catalysts to form a common exhaust leg which contains a catalyst which possesses a three-way function under stoichiometric conditions. The two nitrogen oxide storage catalysts are desulphurized offset in time with respect to one another. While rich exhaust gas at a high temperature flows through one storage catalyst for desulphurization, lean exhaust gas flows through the second storage catalyst, in such a way that the combined exhaust gas is of stoichiometric composition over the entire desulphurization period. Under the stoichiometric conditions, the catalyst with three-way function is capable of converting hydrocarbons, carbon monoxide and nitrogen oxides to harmless components.

Abstract translation: 精益燃烧发动机需要包括用于从其废气中除去氮氧化物的氮氧化物储存催化剂的废气系统。 当贫燃机用含硫废气进行操作时，必须不时地将储存催化剂脱硫。 在脱硫过程中，存在污染物排放高的风险。 当贫燃发动机的气缸组合成两组时，可以减少这些排放物，这两组燃烧器将废气排放到两个分配的排气支路，每个排放管排列有至少一个氮氧化物储存催化剂。 两个排气支路结合在储存催化剂之外以形成一个共同的排气支管，它包含一个在化学计量条件下具有三通功能的催化剂。 两种氮氧化物储存催化剂相对于彼此在时间上被脱硫。 虽然高温下的废气通过一个用于脱硫的储存催化剂流过，贫废气以这样的方式流过第二储存催化剂，使得组合废气在整个脱硫周期内具有化学计量组成。 在化学计量条件下，具有三向功能的催化剂能够将碳氢化合物，一氧化碳和氮氧化物转化为无害成分。

公开(公告)号：US6001318A

公开(公告)日：1999-12-14

申请号：US996215

申请日：1997-12-22

Applicant: Hans Van Den Tillaart ,  Jurgen Leyrer ,  Egbert Lox ,  Thomas Kreuzer ,  Stephan Eckhoff

Inventor： Hans Van Den Tillaart ,  Jurgen Leyrer ,  Egbert Lox ,  Thomas Kreuzer ,  Stephan Eckhoff

IPC: F01N3/22 ,  B01D53/86 ,  B01D53/94 ,  F01N3/20 ,  F01N3/24 ,  F01N3/28 ,  B01D47/00 ,  B01J8/00 ,  F01N3/00 ,  F01N3/10

CPC classification number: B01D53/9409 ,  B01D53/9495 ,  F01N2610/03

Abstract: A process is disclosed for lowering nitrogen oxide levels in combustion engine exhaust gas by a reduction catalyst and by controlling the exhaust gas temperature upstream from the catalyst to a constant value, at which the catalyst exhibits maximum conversion for nitrogen oxides. It is possible to maintain maximum conversion over a wide range of engine outlet temperatures of the exhaust gas.

Abstract translation: 公开了一种通过还原催化剂降低内燃机废气中的氮氧化物含量并通过将催化剂上游的废气温度控制在恒定值的方法，在该值下催化剂表现出氮氧化物的最大转化率。 可以在废气的发动机出口温度范围内保持最大转换。

公开(公告)号：US09328682B2

公开(公告)日：2016-05-03

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: F01N3/00 ,  F01N3/10 ,  F02D41/02 ,  F01N3/08 ,  F01N9/00 ,  F01N13/00 ,  F02D41/06 ,  F02D41/14

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：US08454917B2

公开(公告)日：2013-06-04

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: B01D53/94 ,  B01J23/44 ,  B01J32/00 ,  F01N3/10 ,  F01N3/28

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: A nitrogen oxide storage catalyst is provided, which 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 includes 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 and applied to a homogeneous magnesium-aluminum mixed oxide. The second layer is notable for three-way catalytic activity, and includes palladium applied to aluminum oxide and barium oxide or strontium oxide, but no platinum.

Abstract translation: 提供了一种氮氧化物存储催化剂，其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，并且包括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储存材料的组合，其中氮氧化物存储组分同样 存在并应用于均匀的镁铝混合氧化物。 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：US20110258982A1

公开(公告)日：2011-10-27

申请号：US12304843

申请日：2007-06-05

Applicant: Stephan Eckhoff ,  Meike Wittrock ,  Ulrich Goebel ,  Wilfried Mueller ,  Thomas Kreuzer

Inventor： Stephan Eckhoff ,  Meike Wittrock ,  Ulrich Goebel ,  Wilfried Mueller ,  Thomas Kreuzer

IPC: F01N3/18

CPC classification number: F01N3/0885 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/101 ,  F01N3/103 ,  F01N13/009 ,  F01N13/011 ,  F01N13/107 ,  F01N2250/12 ,  F01N2260/04 ,  F01N2330/06 ,  F01N2430/06 ,  Y02A50/2324 ,  Y02T10/22

Abstract: Nitrogen oxide storage catalysts are used to remove the nitrogen oxides present in the lean exhaust gas of lean-burn engines. Storage catalysts are thermally aged by high temperatures. Ageing is due to sintering of the catalytically active noble metal components of the catalyst and to formation of compounds of the storage components with the support materials. According to the invention, the formation of compounds of the storage materials can be largely reversed by treatment of the storage material with a gas mixture containing carbon dioxide, optionally water vapor and optionally nitrogen oxides at temperatures in the range from 200° C. to 950° C., preferably from 300° C. to 700° C. The reactivation can be carried out under emission-neutral conditions directly in the vehicle during driving operation by setting of suitable exhaust gas conditions and regulating the air/fuel ratio.

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。 储存催化剂通过高温热老化。 老化是由于催化剂的催化活性贵金属组分的烧结以及用载体材料形成储存组分的化合物。 根据本发明，存储材料的化合物的形成可以通过用包含二氧化碳，任选的水蒸汽和任选的氮氧化物的气体混合物在200℃至950℃的温度范围内处理储存材料而大大逆转 ℃，优选为300℃至700℃。通过设定合适的废气条件并调节空气/燃料比，可以在驾驶操作期间直接在车辆的发射 - 中性条件下进行再活化。

公开(公告)号：US20100300077A1

公开(公告)日：2010-12-02

申请号：US12599411

申请日：2008-04-16

Applicant: Stephan Eckhoff

Inventor： Stephan Eckhoff

IPC: F01N3/08 ,  B01J38/06 ,  B01J38/08 ,  B01J38/10

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。