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    Exhaust gas catalyst
    1.
    发明授权
    Exhaust gas catalyst 失效
    废气催化剂

    公开(公告)号：US06180075B2

    公开(公告)日：2001-01-30

    申请号：US09056641

    申请日：1998-04-08

    申请人： Dieter Lindner ,  Lothar Mussmann ,  Renee Van Yperen ,  Thomas Kreuzer ,  Egbert Lox

    发明人： Dieter Lindner ,  Lothar Mussmann ,  Renee Van Yperen ,  Thomas Kreuzer ,  Egbert Lox

    IPC分类号： B01J802

    CPC分类号： B01D53/945 ,  B01J23/63 ,  B01J23/894 ,  B01J23/8946 ,  Y02T10/22

    摘要： A single-layered three-way catalytic converter containing palladium as the only catalytically active noble metal, with high activity and heat resistance. The catalyst contains, in addition to finely divided, stabilized aluminum oxide, at least one finely divided cerium/zirconium mixed oxide and optionally finely divided nickel oxide as well as highly dispersed amounts of cerium oxide, zirconium oxide and barium oxide. The palladium is distributed largely uniformly throughout the entire catalyst.

    摘要翻译： 包含钯作为唯一催化活性贵金属的单层三元催化转化器，具有高活性和耐热性。 除了细分散的稳定化的氧化铝之外，催化剂还含有至少一种细碎的铈/锆混合氧化物和任选的细碎的氧化镍以及高分散量的氧化铈，氧化锆和氧化钡。 钯在整个催化剂中大部分均匀分布。

    Exhaust gas treatment catalyst for internal combustion engines with two catalytically active layers on a carrier structure
    4.
    发明授权
    Exhaust gas treatment catalyst for internal combustion engines with two catalytically active layers on a carrier structure 失效
    在载体结构上具有两个催化活性层的内燃机的废气处理催化剂

    公开(公告)号：US06348430B1

    公开(公告)日：2002-02-19

    申请号：US09100251

    申请日：1998-06-19

    申请人： Dieter Lindner ,  Renee Van Yperen ,  Lothar Mussmann ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Dieter Lindner ,  Renee Van Yperen ,  Lothar Mussmann ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： B01J2106

    CPC分类号： B01D53/945 ,  B01J23/63 ,  B01J37/0244 ,  Y02T10/22 ,  Y10S502/514

    摘要： A catalyst for treating the exhaust gas from internal combustion engines is provided, wherein the catalyst contains two catalytically active layers supported on a support. The first catalytically active layer contains a platinum group metal in close contact with all of the constituents of the first catalytically active layer, wherein the constituents of the first catalytically active layer include particulate aluminum oxide; particulate oxygen storage material, such as cerium oxide, cerium/zirconium and zirconium/cerium mixed oxides, and alkaline earth metal oxides. The second catalytically active layer, which is in direct contact with the exhaust gas, contains particulate aluminum oxide and at least one particulate oxygen storage material, such as cerium oxide, cerium/zirconium and zirconium/cerium mixed oxides. Rhodium is supported on part of the aluminum oxides in the second catalytically active layer or on the particulate oxygen storage material in the second catalytically active layer. By providing the platinum group metal in close contact with all of the constituents of the first catalytically active layer, improved conversion efficiency of the impurities in the exhaust gas can be achieved.

    摘要翻译： 提供了一种用于处理来自内燃机的废气的催化剂，其中催化剂含有两个负载在载体上的催化活性层。 第一催化活性层包含与第一催化活性层的所有成分紧密接触的铂族金属，其中第一催化活性层的组分包括颗粒状氧化铝; 颗粒状储氧材料，如氧化铈，铈/锆和锆/铈混合氧化物和碱土金属氧化物。 与废气直接接触的第二催化活性层含有颗粒状氧化铝和至少一种颗粒状储氧材料，例如氧化铈，铈/锆和锆/铈混合氧化物。 铑负载在第二催化活性层中的一部分氧化铝上或第二催化活性层中的颗粒储氧材料上。 通过提供与第一催化活性层的所有成分紧密接触的铂族金属，可以实现废气中杂质的转化效率的提高。

    Process for operating a three-way catalyst that contains an oxygen-storage component
    8.
    发明授权
    Process for operating a three-way catalyst that contains an oxygen-storage component 有权

    公开(公告)号：US06655129B2

    公开(公告)日：2003-12-02

    申请号：US10056814

    申请日：2002-01-24

    申请人： Dieter Lindner ,  Jorg-Michael Richter ,  Egbert Lox ,  Thomas Kreuzer ,  Martin Votsmeier ,  Lothar Mussmann

    发明人： Dieter Lindner ,  Jorg-Michael Richter ,  Egbert Lox ,  Thomas Kreuzer ,  Martin Votsmeier ,  Lothar Mussmann

    IPC分类号： F01N300

    CPC分类号： F02D41/2458 ,  F02D41/0295 ,  F02D41/1408 ,  F02D41/1456 ,  F02D2041/1437 ,  F02D2200/0814 ,  Y02T10/22

    摘要： A process is provided for operating a three-way catalyst that contains an oxygen storage component, that has a minimum and a maximum filling degree for oxygen and that is located in the exhaust gas line of an internal combustion engine. The air/fuel mixture supplied to the engine is varied in such a way that the filling degree of the oxygen storage component in the catalyst is held within a set-point interval between the minimum and maximum filling degree. According to this process, in order to regulate the air/fuel mixture, migration of the filling degree out of the set-point interval is checked in a test phase in such a way that the filling degree is increased or lowered relative to the instantaneous value (initial value) by short-term enrichment or reduction in richness of the air/fuel mixture supplied to the engine by a certain amount and immediately returned to the initial value by a short-term opposing change in the air/fuel mixture (lean/rich pulse sequence or rich/lean pulse sequence). In the case of a breakthrough of lean or rich exhaust gas through the catalyst during the test phase, the air/fuel mixture is enriched or reduced in richness in order to correct the filling degree, wherein the amount by which the filling degree during the test phase is increased or decreased is such that no breakthrough of lean or rich exhaust gas takes place through the catalyst when the filling degree of the oxygen storage component is within the set-point interval.