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109 条记录 (耗时 0.027 秒)

    Method of operating a catalyst which includes components for storing hydrocarbon
    3.
    发明申请
    Method of operating a catalyst which includes components for storing hydrocarbon 有权
    操作包含用于储存烃的组分的催化剂的方法

    公开(公告)号：US20070166827A1

    公开(公告)日：2007-07-19

    申请号：US10556548

    申请日：2004-05-12

    申请人： Martin Votsmeier ,  Frank Schutze ,  Stephan Malmberg ,  Jurgen Gieshoff ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Martin Votsmeier ,  Frank Schutze ,  Stephan Malmberg ,  Jurgen Gieshoff ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： G01N35/08

    CPC分类号： F01N3/0835 ,  F01N3/0814 ,  F01N3/20 ,  F01N9/005 ,  F01N11/00 ,  F01N2370/24 ,  F01N2430/00 ,  F01N2430/06 ,  F01N2430/08 ,  F01N2430/085 ,  F01N2550/02 ,  F01N2550/03 ,  F02D41/027 ,  F02D2200/0802 ,  Y02T10/47 ,  Y10T436/12

    摘要： This invention relates to a method of operating a catalyst for treating the exhaust gas of an internal combustion engine, the catalyst comprising, in addition to catalytically active noble metals, also storage components for storing hydrocarbons. During engine operating phases at low exhaust-gas temperatures, such a catalyst stores the hydrocarbons contained in the exhaust gas without burning them. When the exhaust-gas temperature rises, these hydrocarbons are desorbed again and then oxidized at the catalytically active noble metals. This process can lead to uncontrolled, vigorous combustion of the hydrocarbons stored on the catalyst and, therefore, damage to the catalyst. According to the invention, this damage is avoided by continuously calculating the respective loading of the storage components with hydrocarbons and repeatedly regenerating the storage components depending on the loading by temporarily raising the exhaust-gas temperature before damage to the catalyst can occur.

    摘要翻译： 本发明涉及一种操作用于处理内燃机废气的催化剂的方法，催化剂除了催化活性贵金属外，还包括用于储存烃的储存组分。 在低废气温度的发动机运转阶段，这样的催化剂将不含燃烧物的废气中所含的烃储存在废气中。 当废气温度升高时，这些烃再次解吸，然后在催化活性贵金属处被氧化。 该方法可导致存储在催化剂上的烃的不受控制的剧烈燃烧，因此对催化剂的损害。 根据本发明，通过用碳氢化合物连续地计算储存部件的负荷并且可以在可能发生催化剂的损坏之前通过临时提高排气温度来重新再生存储部件，从而避免了这种损坏。

    Exhaust gas treatment units for internal combustion engines and processes for operating them
    4.
    发明授权
    Exhaust gas treatment units for internal combustion engines and processes for operating them 有权
    用于内燃机的废气处理装置及其操作过程

    公开(公告)号：US06725647B2

    公开(公告)日：2004-04-27

    申请号：US10058685

    申请日：2002-01-28

    申请人： Marcus Pfeifer ,  Barry Van Setten ,  Jurgen Gieshoff ,  Paul Spurk ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Marcus Pfeifer ,  Barry Van Setten ,  Jurgen Gieshoff ,  Paul Spurk ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： F01N300

    CPC分类号： F01N3/0842 ,  B01D53/9418 ,  B01D53/944 ,  B01D53/945 ,  B01D53/9477 ,  B01D2255/1021 ,  B01D2255/911 ,  F01N3/0814 ,  F01N3/20 ,  F01N13/009 ,  F01N13/0097 ,  Y02T10/22 ,  Y02T10/24

    摘要： The present invention provides an exhaust gas treatment unit for an internal combustion engine. A first catalyst unit produces ammonia from corresponding constituents in a rich exhaust gas composition. A second catalyst unit that is located downstream of the first catalyst unit temporarily stores the ammonia produced by the first catalyst unit in the presence of a rich exhaust gas composition. In the presence of a lean exhaust gas composition, the nitrogen oxides present in the exhaust gas are subjected to a reduction reaction using the temporarily stored ammonia as reducing agent. The exhaust gas treatment unit also contains a third catalyst unit that is located between the other two catalyst units, and oxidizes the nitrogen oxides present in the exhaust gas at lean exhaust gas conditions to a such an extent that 25 to 75 vol. % of the nitrogen oxides entering the second catalyst unit consist of nitrogen dioxide.

    摘要翻译： 本发明提供一种用于内燃机的废气处理单元。 第一催化剂单元从富排气组合物中的相应组分产生氨。 位于第一催化剂单元下游的第二催化剂单元在富排气组合物的存在下临时存储由第一催化剂单元产生的氨。 在贫废气组合物的存在下，使用临时储存的氨作为还原剂对废气中存在的氮氧化物进行还原反应。 排气处理单元还含有位于其他两个催化剂单元之间的第三催化剂单元，并且将贫排气条件下的排气中存在的氮氧化物氧化至25〜75体积％ 进入第二催化剂单元的氮氧化物的％由二氧化氮组成。

    Catalytic Soot Filter and Use Thereof in Treatment of Lean Exhaust Gases
    5.
    发明申请
    Catalytic Soot Filter and Use Thereof in Treatment of Lean Exhaust Gases 审中-公开
    催化烟尘过滤器及其在精益排气中的应用

    公开(公告)号：US20090285736A1

    公开(公告)日：2009-11-19

    申请号：US12465141

    申请日：2009-05-13

    申请人： Adolf SCHAFER-SINDLINGER ,  Marcus Pfeifer ,  Ulrich Hackbarth ,  Wilfried Muller ,  Egbert Lox ,  Thomas Kreuzer ,  Roger Staab ,  Michael Hoffmann ,  Jurgen Gieshoff

    发明人： Adolf SCHAFER-SINDLINGER ,  Marcus Pfeifer ,  Ulrich Hackbarth ,  Wilfried Muller ,  Egbert Lox ,  Thomas Kreuzer ,  Roger Staab ,  Michael Hoffmann ,  Jurgen Gieshoff

    IPC分类号： B01D53/94 ,  B01D50/00

    CPC分类号： B01J23/6562 ,  B01D53/944 ,  B01D2255/102 ,  B01D2255/202 ,  B01D2255/204 ,  B01D2255/206 ,  B01D2255/50 ,  B01D2255/908 ,  B01D2257/502 ,  B01D2257/702 ,  B01J23/56 ,  F01N3/0222 ,  F01N3/0253 ,  F01N3/035 ,  F01N2430/085 ,  F01N2510/065 ,  F01N2570/12 ,  F01N2570/16 ,  F02B3/06 ,  F02D41/024 ,  F02D41/025 ,  F02D41/029 ,  F02D41/405 ,  Y02A50/2341 ,  Y02T10/26 ,  Y02T10/44

    摘要： The invention provides a process for reducing the amounts of carbon monoxide, hydrocarbons and soot particles in the lean exhaust gas from an internal combustion engine using a particle filter, wherein the soot particles have a soot ignition temperature TZ and the particle filter is regenerated from time to time by raising the temperature of the particle filter to above the soot ignition temperature and burning the soot particles, wherein the temperature of the filter is increased to the temperature required to initiate soot ignition by burning additional fuel on the catalytic coating when the exhaust gas back pressure reaches a predetermined value. The process is characterised in that the particle filter is provided with a catalytic coating comprising a first group of components for reducing the ignition temperature of soot, said first group of components contains at least one oxygen storage component and at least one platinum group metal selected from the group consisting of platinum, palladium and rhodium. In a preferred embodiment of the process the catalytic coating further comprises a second group of components for oxidising carbon monoxide and hydrocarbons, said second group of components comprises at least a support material selected from the group consisting of aluminium oxide, silicon oxide, titanium oxide, zirconium oxide and zeolite and at least one platinum group metal selected from the group consisting of platinum, palladium and rhodium deposited on said support materials.

    摘要翻译： 本发明提供了一种减少来自使用颗粒过滤器的内燃机的贫废气中的一氧化碳，碳氢化合物和烟灰颗粒的量的方法，其中烟灰颗粒具有烟灰着火温度TZ，并且颗粒过滤器从时间再生 通过将颗粒过滤器的温度升高到烟炱点燃温度以上并燃烧烟灰颗粒，其中过滤器的温度通过在催化涂层上燃烧附加燃料而增加到启动烟灰点火所需的温度 背压达到预定值。 该方法的特征在于，颗粒过滤器设置有包含用于降低烟灰的点燃温度的第一组成分的催化涂层，所述第一组组分含有至少一种储氧组分和至少一种选自以下的铂族金属： 由铂，钯和铑组成的组。 在该方法的优选实施方案中，催化涂层还包含用于氧化一氧化碳和烃的第二组组分，所述第二组组分至少包含选自氧化铝，氧化硅，氧化钛， 氧化锆和沸石以及选自沉积在所述载体材料上的铂，钯和铑中的至少一种铂族金属。

    Method and apparatus for determining the activity and aging behavior of a catalyst
    10.
    发明申请
    Method and apparatus for determining the activity and aging behavior of a catalyst 审中-公开
    用于确定催化剂的活性和老化行为的方法和装置

    公开(公告)号：US20060216202A1

    公开(公告)日：2006-09-28

    申请号：US10559555

    申请日：2004-06-03

    申请人： Jurgen Gieshoff ,  Hartmut Finkbeiner ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Jurgen Gieshoff ,  Hartmut Finkbeiner ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： G01N31/10

    CPC分类号： F01N11/00 ,  F01N2550/02 ,  F01N2550/20 ,  Y02T10/47

    摘要： The invention relates to a method of determining activity and aging behavior of a catalyst. For this purpose, two independent substreams of combustion offgases are produced and mixed before coming into contact with the catalyst. The first substream of combustion offgases is preferably produced by burning a motor fuel and forms the major part of the combustion offgases. The second substream of combustion offgases is produced by means of a gas burner whose air ratio can be adjusted within a wide range. Mixing of this second substream of combustion offgases into the first substream enables the composition of the total stream to be set in a defined manner.

    摘要翻译： 本发明涉及一种确定催化剂的活性和老化行为的方法。 为此，在与催化剂接触之前，产生和混合两个独立的燃烧废气子流。 燃烧废气的第一个子流优选通过燃烧电动机燃料并形成燃烧废气的主要部分而产生。 燃烧废气的第二子流通过气体燃烧器产生，其空气比可以在宽范围内调节。 将第二子燃烧废气混合到第一子流中使得能够以限定的方式设定总流的组成。