公开(公告)号：US20040186016A1

公开(公告)日：2004-09-23

申请号：US10389834

申请日：2003-03-17

申请人： OMG AG & Co. KG

发明人： Tassilo Bog ,  Lothar Mussmann ,  Dieter Lindner ,  Martin Votsmeier ,  Matthias Feger ,  Egbert Lox ,  Thomas Kreuzer ,  Mamoun Muhammed ,  Othon Adamopoulos

IPC分类号： B01J023/10

CPC分类号： B01J37/0242 ,  B01D53/945 ,  B01J23/002 ,  B01J23/10 ,  B01J23/63 ,  B01J35/04 ,  B01J2523/00 ,  C01F17/0012 ,  C01P2002/50 ,  C01P2002/60 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/90 ,  Y02T10/22 ,  B01J2523/23 ,  B01J2523/31 ,  B01J2523/3712 ,  B01J2523/48 ,  B01J2523/3706

摘要： An oxygen storage material comprising cerium oxide and at least one second oxide of a metal M1 is disclosed as well as a process for manufacturing the material and the use of this material in an exhaust gas cleaning catalyst. In a preferred embodiment the oxygen storage material comprises particles from a Ce/M1 mixed oxide solid solution coated with an oxide of another metal M2. Metal M1 e.g. can be calcium or zirconium while metal M2 most preferably is aluminum.

摘要翻译： 公开了一种包含氧化铈和金属M 1的至少一种第二氧化物的储氧材料，以及用于制造材料的方法以及在废气清洁催化剂中使用该材料。 在优选的实施方案中，储氧材料包含涂覆有另一种金属M 2的氧化物的Ce / M 1混合氧化物固溶体的颗粒。 金属M 1，例如 可以是钙或锆，而金属M 2最优选是铝。

公开(公告)号：US20020121083A1

公开(公告)日：2002-09-05

申请号：US10056814

申请日：2002-01-24

申请人： OMG AG & Co. KG

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

IPC分类号： F01N003/00 ,  F01N007/00 ,  G01M019/00

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.

摘要翻译： 提供了一种用于操作含有储氧部件的三元催化剂的方法，其具有氧气的最小和最大填充度，并且位于内燃机的废气管线中。 提供给发动机的空气/燃料混合物以使得催化剂中的储氧组分的填充度保持在最小和最大填充度之间的设定点间隔内的方式变化。 根据该过程，为了调节空气/燃料混合物，在测试阶段中检查填充度在设定点间隔之外的迁移，使得填充度相对于瞬时值增加或降低 （初始值），通过短时间浓缩或将提供给发动机的空气/燃料混合物的浓度降低一定量，并立即通过空气/燃料混合物的短期相反变化（稀/ 富脉冲序列或富/脉冲序列）。 在试验阶段通过催化剂的贫或富排气的突破的情况下，空气/燃料混合物的浓度丰富或减少，以便校正填充度，其中在试验期间填充度的量 相位增加或减少使得当储氧部件的填充度在设定点间隔内时，没有通过催化剂发生贫或富排气的突破。