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公开(公告)号：US5829250A
公开(公告)日：1998-11-03
申请号：US720844
申请日：1996-10-03
CPC分类号： F01N3/2867 , B01D53/9409 , B01D53/9454 , B01D53/9472 , F01N13/0097 , F01N13/017 , F01N3/2066 , F01N3/2828 , F01N3/2857 , F01N2570/14 , F01N2610/03 , Y02T10/22 , Y02T10/24
摘要： The present invention is particularly applicable to lean burn engines that produce exhaust containing insufficient amounts of unburned hydrocarbons to satisfactorily reduce NOx emissions without undermining engine performance. In the exhaust purification system, ethanol or another suitable hydrocarbon is injected into the exhaust stream at an appropriate location between the engine and the catalytic converter. A deNOx catalytic converter is positioned within the exhaust downstream from the ethanol injection point. The combination engine application, ethanol injection and suitable deNOx catalyst combine to reduce NOx to satisfactory levels without producing significant amounts of undesirable secondary nitrogen containing compounds. An oxidation catalytic converter is positioned in the exhaust downstream from the deNOx catalytic converter. The oxidation catalyst serves to convert any remaining unburned hydrocarbons into carbon dioxide and water. At the same time, only small amounts of secondary nitrogen compounds are converted back into NOx compounds upon passage through the oxidation catalyst. The end result being an over all reduction in both HC and NOx compounds particularly for lean burn engines to satisfactory levels.
摘要翻译： 本发明特别适用于生产含有不足量未燃碳氢化合物的排气的稀薄燃烧发动机，以令人满意地减少NOx排放而不损害发动机的性能。 在排气净化系统中，在发动机和催化转化器之间的适当位置将乙醇或其它合适的烃注入废气流中。 脱硝催化转化器位于乙醇注入点下游的排气口内。 组合发动机应用，乙醇注射和合适的脱硝催化剂组合以将NOx降低至令人满意的水平，而不产生显着量的不期望的次级含氮化合物。 氧化催化转化器位于脱硝催化转化器下游的废气中。 氧化催化剂用于将任何剩余的未燃烧的烃转化为二氧化碳和水。 同时，只有少量的次级氮化合物在通过氧化催化剂时转化回NOx化合物。 最终的结果是将HC和NOx化合物特别是稀薄燃烧发动机的所有减少量都达到令人满意的水平。
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2.发明授权
公开(公告)号：US5578277A
公开(公告)日：1996-11-26
申请号：US544365
申请日：1995-10-17
CPC分类号： F01N3/2857 , F01N1/083 , F01N1/089 , F01N3/28 , F01N3/2885 , F01N3/2892 , Y10S55/30
摘要： A modular catalytic converter and muffler is used to purify exhaust from a relatively large diesel engine. The device includes various structural components that are mounted in the exhaust flow path within a housing having an inlet and an outlet. A plate mounted within the housing divides the housing into an inlet chamber and an outlet chamber. A plurality of catalytic converter sub-cans are mounted across the plate between the inlet chamber and the outlet chamber. A flow distributor is mounted within the housing upstream of the catalytic converter sub-cans. The flow distributor divides and directs a portion of the exhaust to each of the catalytic converter sub-cans. Some muffler structure is mounted within the housing between the catalytic converter sub-cans and the outlet in order to attenuate noise in the exhaust.
摘要翻译： 使用模块化催化转化器和消声器来净化来自较大柴油发动机的排气。 该装置包括在具有入口和出口的壳体内安装在排气流路中的各种结构部件。 安装在壳体内的板将壳体分成入口室和出口室。 多个催化转化器子罐安装在入口室和出口室之间的板上。 流量分配器安装在催化转化器子罐的上游的壳体内。 流量分配器将一部分排气分配并引导到每个催化转化器子罐。 一些消声器结构安装在催化转换器子罐和出口之间的壳体内，以便减轻排气中的噪声。
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公开(公告)号：US6016653A
公开(公告)日：2000-01-25
申请号：US908028
申请日：1997-08-14
IPC分类号： F02M45/02 , F01N3/20 , F01N3/24 , F02B3/06 , F02D41/02 , F02D41/14 , F02D41/38 , F02D41/40 , F02D45/00 , F02M57/02 , F01N3/00
CPC分类号： F02D41/3827 , F02D41/0235 , F02D41/1446 , F02D41/405 , F02M57/025 , F02B2275/14 , F02B3/06 , F02D2250/32 , F02D41/402 , Y02T10/123 , Y02T10/44
摘要： The present invention is particularly well suited for purifying exhaust from relatively large lean burn diesel engines. The emissions purification system causes an after-injection of fuel through the engine fuel injector during the exhaust stroke of an internal combustion engine. A computer controls the injector to inject an optimal amount of NOx reducing fuel into the engine cylinder. The optimal amount corresponds to an amount that will achieve optimal NOx reduction rates for the given engine operating condition and exhaust temperature. A computer periodically senses the engine operating condition and determines the exhaust temperature, and calculates the appropriate injection amount. With appropriate deNOx and oxidation catalysts located downstream from the injector, the emissions purification system of the present invention has the ability to greatly reduce NOx content of the exhaust while maintaining HC emissions at acceptable levels and greatly reducing system complexity.
摘要翻译： 本发明特别适用于从相对较大的稀燃柴油发动机中净化废气。 排放净化系统在内燃机的排气冲程期间引起燃料经过发动机燃料喷射器的后续喷射。 计算机控制喷射器以将最佳量的NOx还原燃料注入发动机气缸。 最佳量对应于对于给定的发动机操作条件和排气温度将达到最佳NOx还原速率的量。 计算机周期性地检测发动机工作状态并确定排气温度，并计算适当的喷射量。 通过位于喷射器下游的合适的脱硝和氧化催化剂，本发明的排放净化系统具有大大降低废气的NOx含量的能力，同时将HC排放保持在可接受的水平，并大大降低了系统的复杂性。
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公开(公告)号：US5611198A
公开(公告)日：1997-03-18
申请号：US291213
申请日：1994-08-16
CPC分类号： F01N3/2867 , B01D53/9409 , B01D53/9454 , B01D53/9472 , F01N13/0097 , F01N13/017 , F01N3/2066 , F01N3/2828 , F01N3/2857 , F01N2570/14 , F01N2610/03 , Y02T10/22 , Y02T10/24
摘要： The present invention is particularly applicable to lean burn engines that produce exhaust containing insufficient amounts of unburned hydrocarbons to satisfactorily reduce NOx emissions without undermining engine performance. In the exhaust purification system, ethanol or another suitable hydrocarbon is injected into the exhaust stream at an appropriate location between the engine and the catalytic converter. A deNOx catalytic converter is positioned within the exhaust downstream from the ethanol injection point. The combination engine application, ethanol injection and suitable deNOx catalyst combine to reduce NOx to satisfactory levels without producing significant amounts of undesirable secondary nitrogen containing compounds. An oxidation catalytic converter is positioned in the exhaust downstream from the deNOx catalytic converter. The oxidation catalyst serves to convert any remaining unburned hydrocarbons into carbon dioxide and water. At the same time, only small amounts of secondary nitrogen compounds are converted back into NOx compounds upon passage through the oxidation catalyst. The end result being an over all reduction in both HC and NOx compounds particularly for lean burn engines to satisfactory levels.
摘要翻译： 本发明特别适用于生产含有不足量未燃碳氢化合物的排气的稀薄燃烧发动机，以令人满意地减少NOx排放而不损害发动机的性能。 在排气净化系统中，在发动机和催化转化器之间的适当位置将乙醇或其它合适的烃注入废气流中。 脱硝催化转化器位于乙醇注入点下游的排气口内。 组合发动机应用，乙醇注射和合适的脱硝催化剂组合以将NOx降低至令人满意的水平，而不产生显着量的不期望的次级含氮化合物。 氧化催化转化器位于脱硝催化转化器下游的废气中。 氧化催化剂用于将任何剩余的未燃烧的烃转化为二氧化碳和水。 同时，只有少量的次级氮化合物在通过氧化催化剂时转化回NOx化合物。 最终的结果是将HC和NOx化合物特别是稀薄燃烧发动机的所有减少量都达到令人满意的水平。
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公开(公告)号：US5522218A
公开(公告)日：1996-06-04
申请号：US294677
申请日：1994-08-23
CPC分类号： F01N9/00 , B01D53/9495 , F01N3/2066 , F01N2260/024 , F01N2560/06 , F01N2570/14 , F01N2610/03 , F01N2610/08 , F01N2610/11 , F01N2610/146 , F01N2900/08 , Y02T10/22 , Y02T10/24 , Y02T10/47
摘要： The present invention is particularly well suited for purifying exhaust from relatively large lean burn diesel engines. A computer controlled injector intermittently injects an optimal amount of NOx reducing fluid into the exhaust passageway from the engine. The optimal amount corresponds to an amount that will achieve optimal NOx reduction rates for the given engine operating condition and exhaust temperature. A computer periodically senses the engine operating condition and the exhaust temperature, and calculates the appropriate injection amount. With appropriate deNOx and oxidation catalysts located downstream from the injector, the exhaust purification system of the present invention has the ability to greatly reduce NOx content of the exhaust while maintaining HC emissions at acceptable levels.
摘要翻译： 本发明特别适用于从相对较大的稀燃柴油发动机中净化废气。 计算机控制的喷射器间歇地将最佳量的NOx还原流体从发动机喷射到排气通道中。 最佳量对应于对于给定的发动机操作条件和排气温度将达到最佳NOx还原速率的量。 计算机周期性地检测发动机工作状态和排气温度，并计算适当的喷射量。 使用位于喷射器下游的合适的脱硝和氧化催化剂，本发明的排气净化系统具有大大降低废气的NOx含量的能力，同时将HC排放保持在可接受的水平。
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6.发明授权Combustion exhaust purification system and method via high sac volume fuel injectors 失效燃烧排气净化系统和方法通过高密度体积燃料喷射器
公开(公告)号：US5787708A
公开(公告)日：1998-08-04
申请号：US814164
申请日：1997-03-10
CPC分类号： F02M61/18 , F01N13/0097 , F01N2370/04 , F01N2570/14 , F02B2075/025 , F02B2075/027
摘要： The present invention is particularly well suited for purifying exhaust from relatively large lean burn diesel engines. The emissions purification system causes the addition of an optimal amount of fuel through the engine fuel injector after closure of the fuel injector needle check valve by enlarging the fuel injector SAC volume. The optimal amount corresponds to an amount that will achieve optimal NOx reduction rates for the given engine operating condition and exhaust temperature when the exhaust is passes through appropriate deNOx and oxidation catalysts located downstream from the injector. The emissions purification system of the present invention has the ability to greatly reduce NOx content of the exhaust while maintaining HC emissions at acceptable levels and greatly reducing system complexity.
摘要翻译： 本发明特别适用于从相对较大的稀燃柴油发动机中净化废气。 排放净化系统通过扩大燃料喷射器SAC体积而在关闭燃料喷射器针止回阀之后通过发动机燃料喷射器添加最佳量的燃料。 最佳量对应于当排气穿过位于喷射器下游的适当的脱硝和氧化催化剂时，对于给定的发动机操作条件和排气温度将达到最佳NOx还原速率的量。 本发明的排放净化系统具有大大降低排气的NOx含量的能力，同时将HC排放保持在可接受的水平并大大降低了系统的复杂性。
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