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    • 7. 发明授权
    • Exhaust gas purifying system
    • 废气净化系统
    • US06557342B2
    • 2003-05-06
    • US09948876
    • 2001-09-10
    • Katsuo SugaYasunari HanakiMaki ShimadaHiroshi AkamaMotohisa Kamijo
    • Katsuo SugaYasunari HanakiMaki ShimadaHiroshi AkamaMotohisa Kamijo
    • F01N310
    • B01D53/9454F01N3/0814F01N3/0842F01N3/0871F01N13/009F01N13/0093F01N2240/16F01N2610/04Y02A50/2324Y02T10/22
    • An exhaust gas purifying system for an internal combustion engine mounted on an automotive vehicle. The exhaust gas purifying system may include an exhaust gas component concentration regulating device disposed in an exhaust gas passageway of the engine, for regulating concentrations of gas components in exhaust gas discharged from the engine such that the concentrations of carbon monoxide and hydrogen are respectively not more than 2.0% by volume and not less than 0.5 by volume and such that a volume concentration ratio of hydrogen/carbon monoxide is not smaller than 0.5, in a first exhaust gas condition in which air/fuel ratio of exhaust gas is within a range of from a rich value and a stoichiometric value. Additionally, a NOx adsorbing and reducing catalyst is disposed in the exhaust gas passageway downstream of the exhaust gas component concentration regulating device, for adsorbing nitrogen oxides in a second exhaust gas condition in which the air/fuel ratio of exhaust gas is at a lean value, and reducing the nitrogen oxides into nitrogen in the first exhaust gas condition.
    • 一种用于安装在机动车辆上的内燃机的废气净化系统。 排气净化系统可以包括设置在发动机的排气通道中的排气成分浓度调节装置,用于调节从发动机排出的废气中的气体成分的浓度,使得一氧化碳和氢气的浓度分别不多 在排气的空气/燃料比在排气的空气/燃料比的范围内的氢气/一氧化碳的体积浓度比不大于0.5的第一废气条件下, 从丰富的价值和化学计量的价值。 另外,在废气成分浓度调节装置的下游的废气通路内配置有NOx吸附还原催化剂,用于在废气的空气/燃料比处于稀薄值的第二废气条件下吸附氮氧化物 并且在第一废气条件下将氮氧化物还原成氮气。