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    Exhaust gas purification process and apparatus with internal generation of ammonia for reducing nitrogen oxide
    1.
    发明授权
    Exhaust gas purification process and apparatus with internal generation of ammonia for reducing nitrogen oxide 失效
    废气净化工艺和装置内置氨气，用于还原氮氧化物

    公开(公告)号：US06338244B1

    公开(公告)日：2002-01-15

    申请号：US09520013

    申请日：2000-03-06

    申请人： Josef Guenther ,  Brititte Konrad ,  Bernd Krutzsch ,  Arno Nolte ,  Dirk Voigtlaender ,  Michel Weibel ,  Marko Weirich ,  Guenter Wenninger

    发明人： Josef Guenther ,  Brititte Konrad ,  Bernd Krutzsch ,  Arno Nolte ,  Dirk Voigtlaender ,  Michel Weibel ,  Marko Weirich ,  Guenter Wenninger

    IPC分类号： F01N300

    CPC分类号： F01N13/107 ,  B01D53/9431 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/0878 ,  F01N3/206 ,  F01N13/009 ,  F01N2240/25 ,  F01N2610/02 ,  F02D41/008 ,  F02D41/0275 ,  F02D41/1475

    摘要： A method and apparatus for purifying an exhaust gas of an internal combustion engine includes an ammonia generating catalyst for generating ammonia from nitrogen oxides contained in the exhaust gas to be purified, and a nitrogen oxide reducing catalyst downstream of the ammonia generating catalyst, for reduction of nitrogen oxides contained in the exhaust gas to be purified. Generated ammonia is used as the reducing agent. A nitrogen oxide adsorption catalyst is arranged upstream of the ammonia generating catalyst, or the ammonia generating catalyst is arranged in an exhaust pipe branch which pertains to only a part of several separately controllable internal-combustion sources. One or more additional exhaust pipe branches assigned to the other internal-combustion sources and lead to the nitrogen oxide reducing catalyst, while bypassing the ammonia generating catalyst. The part of the internal-combustion sources pertaining to the exhaust pipe branch of which contains the ammonia generating catalyst is operated either continuously or intermittently in a rich mode. Also, one or more combustion sources which feed their exhaust gas to the nitrogen oxide adsorption catalyst may be operated alternately in a lean and rich mode.

    摘要翻译： 用于净化内燃机的排气的方法和装置包括用于从待净化的废气中包含的氮氧化物产生氨的氨生成催化剂和在氨生成催化剂下游的氮氧化物还原催化剂，用于还原 包含在待净化废气中的氮氧化物。 生成的氨用作还原剂。 氮氧化物吸附催化剂布置在氨发生催化剂的上游，或者氨生成催化剂被布置在排气管分支中，该排气管分支仅涉及几个可独立控制的内燃源的一部分。 分配给其它内燃源的一个或多个另外的排气管分支，并通过氮氧化物还原催化剂，同时绕过氨发生催化剂。 与其排气管分支相关的含有氨生成催化剂的内燃源的一部分以富模式连续地或间歇地运行。 而且，将其排气供给至氮氧化物吸附催化剂的一个或多个燃烧源可以以贫富浓模式交替操作。

    Process and system for purifying exhaust gases of an internal-combustion engine
    5.
    发明授权
    Process and system for purifying exhaust gases of an internal-combustion engine 失效
    内燃机废气净化工艺及系统

    公开(公告)号：US06318073B1

    公开(公告)日：2001-11-20

    申请号：US09590009

    申请日：2000-06-09

    申请人： Walter Boegner ,  Guenter Karl ,  Bernd Krutzsch ,  Christof Schoen ,  Dirk Voigtlaender ,  Guenter Wenninger

    发明人： Walter Boegner ,  Guenter Karl ,  Bernd Krutzsch ,  Christof Schoen ,  Dirk Voigtlaender ,  Guenter Wenninger

    IPC分类号： F01N300

    CPC分类号： F01N3/085 ,  F01N3/0842 ,  F01N3/0878 ,  F01N3/0885 ,  F01N3/22 ,  F02B1/04

    摘要： An internal-combustion engine includes an engine control system that permits a change-over between a lean operation and a rich operation of the internal-combustion engine, and an exhaust gas purification system. A &lgr;-probe, an SOx storage catalyst and an NOx storage catalyst are successively arranged in an exhaust gas line behind the engine. At the start of desulfurization of the SOx storage catalyst, a change-over takes place from the lean to the rich operation of the engine. Secondary air is fed into the exhaust gas line; a predetermined &lgr; value of the exhaust gases mixed with secondary air and a temperature in the SOx storage catalyst are measured. At the end of the desulfurization, a change-over takes place from the rich to a lean operation of the engine.

    摘要翻译： 内燃机包括允许内燃机的精馏操作和丰富运转之间的转换的发动机控制系统和排气净化系统。 在发动机后面的排气管线中依次配置有羔羊探针，SOx储存催化剂和NOx储存催化剂。 在SOx储存催化剂的脱硫开始时，从发动机的稀薄运行到富油运转发生转换。 二次空气进入废气管路; 测量与二次空气混合的废气的预定amb值和SO x吸留催化剂中的温度。 在脱硫结束时，从发动机的丰富运行到精益运转都会发生转换。

    Exhaust-gas cleaning system and method with internal ammonia generation, for the reduction of nitrogen oxides
    6.
    发明授权
    Exhaust-gas cleaning system and method with internal ammonia generation, for the reduction of nitrogen oxides 失效
    废气净化系统和内部氨生成方法，用于还原氮氧化物

    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。