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    Single layer high performance catalyst
    4.
    发明授权
    Single layer high performance catalyst 有权
    单层高性能催化剂

    公开(公告)号：US06524992B2

    公开(公告)日：2003-02-25

    申请号：US09818998

    申请日：2001-03-28

    申请人： Lothar Mussmann ,  Dieter Lindner ,  Martin Votsmeier ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Lothar Mussmann ,  Dieter Lindner ,  Martin Votsmeier ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： B01J2310

    CPC分类号： B01D53/945 ,  B01J23/42 ,  B01J23/464 ,  B01J23/63 ,  B01J37/0248 ,  Y02T10/22

    摘要： A single layer high performance catalyst containing on an inert carrier body a catalytic coating comprising platinum, rhodium and various oxide materials. The catalyst contains a catalytic coating having at least one first support material selected from the group having a first active alumina, a ceria rich ceria/zirconia mixed oxide and a zirconia component, said at least one first support material being catalyzed with a first part of the total platinum amount of the catalyst, and a second support material catalyzed with the second part of the total platinum amount and with rhodium said second support material being a second active alumina.

    摘要翻译： 在惰性载体上含有铂，铑和各种氧化物材料的催化涂层的单层高性能催化剂。 该催化剂含有具有至少一种选自具有第一活性氧化铝，富铈二氧化铈/氧化锆混合氧化物和氧化锆组分的第一载体材料的催化涂层，所述至少一种第一载体材料被第一部分催化 催化剂的总铂量，以及以总铂量的第二部分催化的第二载体材料，并且所述第二载体材料为第二活性氧化铝。

    Process for operating a three-way catalyst that contains an oxygen-storage component
    7.
    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.