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    • 5. 发明授权
    • Series combination catalytic converter
    • 系列组合催化转化器
    • US5829250A
    • 1998-11-03
    • US720844
    • 1996-10-03
    • William H. LaneDaniel J. LearnedRandy N. PetersonAaron L. SmithScott T. White
    • William H. LaneDaniel J. LearnedRandy N. PetersonAaron L. SmithScott T. White
    • F01N3/08B01D53/94F01N3/20F01N3/28F01N13/02F01N13/04
    • F01N3/2867B01D53/9409B01D53/9454B01D53/9472F01N13/0097F01N13/017F01N3/2066F01N3/2828F01N3/2857F01N2570/14F01N2610/03Y02T10/22Y02T10/24
    • 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.
    • 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。
    • 9. 发明授权
    • Series combination catalytic converter
    • 系列组合催化转化器
    • US5611198A
    • 1997-03-18
    • US291213
    • 1994-08-16
    • William H. LaneDaniel J. LearnedRandy N. PetersonAaron L. SmithScott T. White
    • William H. LaneDaniel J. LearnedRandy N. PetersonAaron L. SmithScott T. White
    • F01N3/08B01D53/94F01N3/20F01N3/28F01N13/02F01N13/04
    • F01N3/2867B01D53/9409B01D53/9454B01D53/9472F01N13/0097F01N13/017F01N3/2066F01N3/2828F01N3/2857F01N2570/14F01N2610/03Y02T10/22Y02T10/24
    • 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.
    • 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。