公开(公告)号：US06408620B1

公开(公告)日：2002-06-25

申请号：US09736418

申请日：2000-12-15

申请人： Walter Boegner ,  Josef Günther ,  Hans-Peter Holzt ,  Bernd Krutzsch ,  Stefan Renfftlen ,  Christof Schön ,  Dirk Voightländer ,  Michel Weibel ,  Günter Wenninger

发明人： Walter Boegner ,  Josef Günther ,  Hans-Peter Holzt ,  Bernd Krutzsch ,  Stefan Renfftlen ,  Christof Schön ,  Dirk Voightländer ,  Michel Weibel ,  Günter Wenninger

IPC分类号： F01N300

摘要： A method for operating an exhaust-gas cleaning system having an NOx adsorption accumulator and an SOx trap, includes, in normal operating phases, feeding the exhaust gas to be cleaned first via the SOx trap and then via the NOx adsorption accumulator. The normal operating phases are from time to time interrupted by desulphurization phases for desulphurizing the SOx trap. Means are provided for controlling the direction of flow of the exhaust stream so that it optionally passes firstly via the SOx trap and then via the NOx adsorption accumulator, or firstly via the NOx adsorption accumulator and then via the SOx trap, so that during the desulphurization phases the exhaust gas can be passed firstly via the NOx adsorption accumulator and then via the SOx trap.

公开(公告)号：US06574955B2

公开(公告)日：2003-06-10

申请号：US10024626

申请日：2001-12-21

申请人： Doris Schröder ,  Dirk Voigtländer ,  Michel Weibel ,  Günter Wenninger ,  Walter Boegner ,  Kirsten Hardenberg ,  Andreas Hertzberg ,  Günter Karl ,  Bernd Krutzsch ,  Renate Marx ,  Norbert Ruzicka ,  Christof Schön

发明人： Doris Schröder ,  Dirk Voigtländer ,  Michel Weibel ,  Günter Wenninger ,  Walter Boegner ,  Kirsten Hardenberg ,  Andreas Hertzberg ,  Günter Karl ,  Bernd Krutzsch ,  Renate Marx ,  Norbert Ruzicka ,  Christof Schön

IPC分类号： F01N300

CPC分类号： B01D53/9495 ,  B01D53/9409 ,  B01D53/96

摘要： A method for the desulfurization of a nitrogen oxide adsorber of an exhaust gas purification device for a combustion system employs desulfurization phases that are intermittently implemented by a desulfurization control unit. During each desulfurization phase, the carbon monoxide concentration and/or the lambda value of the exhaust gas stream exiting the nitrogen oxide adsorber is recorded. A localized maximum that appears in the recorded course of the carbon monoxide concentration over time, or a downward slope that appears in the established course of the lambda value over time, falling from a temporary plateau value, is employed as criterion for terminating the desulfurization phase. The method may be used, for example, in exhaust gas purification devices in primarily lean-burning vehicle combustion engines.

公开(公告)号：US06318075B1

公开(公告)日：2001-11-20

申请号：US09522091

申请日：2000-03-09

申请人： Josef Günther ,  Andreas Hertzberg ,  Christof Schön ,  Ralph Stetter ,  Dirk Voigtländer

发明人： Josef Günther ,  Andreas Hertzberg ,  Christof Schön ,  Ralph Stetter ,  Dirk Voigtländer

IPC分类号： F01N300

CPC分类号： F02D41/0082 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/0885 ,  F01N13/009 ,  F01N2430/06 ,  F01N2570/04 ,  F01N2570/14 ,  F02D41/0007 ,  F02D41/025 ,  F02D41/028 ,  Y02A50/2344 ,  Y02T10/144 ,  Y02T10/26

摘要： A method and apparatus for periodically desulphating a nitrogen oxide or sulphur oxide storage vessel of an exhaust emission control system of a multi-cylinder internal combustion engine, in which an engine exhaust emission containing reducing agent and oxygen is fed to the nitrogen oxide or sulphur oxide storage vessel by setting a rich fuel/air ratio for a first subset of the engine cylinders and a fuel/air ratio which is, in comparison, leaner for the other cylinders. The distance between the fuel/air ratio for the first subset of the engine cylinders and that for the second subset of the engine cylinders is set higher in an initial storage vessel heating-up phase than in the subsequent desulphation mode, and/or control errors of the entire fuel/air ratio are eliminated by a predefinable set point value by modifying the fuel/air ratio either of just the first subset or just the second subset of the engine cylinders. Used, for example, in motor vehicles.

摘要翻译： 一种用于对多气缸内燃机的排气排放控制系统的氮氧化物或硫氧化物储存容器进行周期性脱硫的方法和装置，其中将含有还原剂和氧气的发动机废气排放物供给至氮氧化物或硫氧化物 通过设定用于发动机气缸的第一子集的丰富的燃料/空气比和相对于其他气缸较稀的燃料/空气比，存储容器。 发动机气缸的第一子集和发动机气缸的第二子集的燃料/空气比之间的距离在初始储存容器加热阶段比在随后的脱硫模式中设定得更高，和/或控制误差 通过仅仅是发动机气缸的第一子集或仅仅是第二子集的燃料/空气比来改变整个燃料/空气比的整个燃料/空气比被预定的设定点值消除。 用于例如机动车辆。