公开(公告)号：US06662552B1

公开(公告)日：2003-12-16

申请号：US09744030

申请日：2001-12-03

申请人： Josef Gunther ,  Bernd Krutzsch ,  Christof Schoen ,  Dirk Voigtlaender ,  Miechel Weibel ,  Marko Weirich

发明人： Josef Gunther ,  Bernd Krutzsch ,  Christof Schoen ,  Dirk Voigtlaender ,  Miechel Weibel ,  Marko Weirich

IPC分类号： F01N300

CPC分类号： F01N3/2066 ,  B01D53/9431 ,  F01N3/206 ,  F01N13/009 ,  F01N2240/25 ,  F01N2570/14 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02A50/2344 ,  Y02T10/24

摘要： An exhaust-gas cleaning system removes at least nitrogen oxides contained in exhaust-gas from a combustion source. An ammonia-generation catalytic converter generates ammonia using constituents of at least some of the exhaust gas emitted from the combustion source during ammonia-generation operating phases. Downstream a nitrogen oxide reduction catalytic converter reduces nitrogen oxides which are contained in the exhaust gas emitted from the combustion source using the ammonia generated as reducing agent. A nitrogen monoxide generation unit is situated outside the combustion source, for enriching the exhaust gas which is fed to the ammonia-generation catalytic converter with generated nitrogen monoxide during the ammonia-generation operating phases. The system is used for cleaning exhaust gases of motor vehicle internal-combustion engines which are operated predominantly in lean-burn mode, removing nitrogen oxides which are contained therein.

摘要翻译： 排气净化系统至少从燃烧源中除去废气中含有的氮氧化物。 氨发生催化转化器在氨发生运行阶段期间使用从燃烧源排出的至少一些废气的成分产生氨。 下游的氮氧化物还原催化转化器使用生成的作为还原剂的氨还原从燃烧源排出的废气中所含的氮氧化物。 一氧化氮生成单元位于燃烧源的外部，用于在氨发生运行阶段中富集在生成的氨生成催化转化器中产生的一氧化氮的废气。 该系统用于清洁主要在稀燃模式下运行的机动车辆内燃机的废气，除去其中所含的氮氧化物。

公开(公告)号：US5782088A

公开(公告)日：1998-07-21

申请号：US813408

申请日：1997-03-10

申请人： Josef Gunther ,  Roland Kemmler ,  Herbert Klein ,  Uwe Kleinecke ,  Wolfgang Oehler

发明人： Josef Gunther ,  Roland Kemmler ,  Herbert Klein ,  Uwe Kleinecke ,  Wolfgang Oehler

IPC分类号： F01N3/20 ,  F01N13/04 ,  F01N13/10 ,  F02D17/02 ,  F02M26/01 ,  F02M26/43 ,  F02M25/06

CPC分类号： F01N13/011 ,  F01N3/2006 ,  F02D17/02 ,  F02M26/01 ,  F02M26/43 ,  F01N13/107 ,  F01N2430/10 ,  Y02T10/26

摘要： In an internal combustion engine with at least two groups of cylinders of which each has an exhaust pipe with a catalytic converter and of which one group can be shut down so that it is inoperative during part-load engine operation, the exhaust pipes are joined downstream of the catalytic converters by a common pipe section, and vacuum generating means are provided for subjecting the exhaust pipe of the inoperative cylinder group upstream of its catalytic converter during part load operation when the one cylinder group is shut down to vacuum for pulling exhaust gas from the common pipe section into the catalytic converter of the inoperative cylinder group.

摘要翻译： 在具有至少两组气缸的内燃机中，每组具有带催化转化器的排气管，并且其中一组可以关闭，使其在部分负荷发动机运行期间不起作用，排气管连接在下游 的催化转化器，并且提供真空发生装置，用于在部分加载操作期间使一个气缸组关闭到真空以将废气拉出的催化转化器的不工作气缸组的排气管从 普通管段进入不活动气缸组的催化转化器。