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    System for Reducing NOx in Exhaust
    2.
    发明申请
    System for Reducing NOx in Exhaust 有权
    排气中减少NOx的系统

    公开(公告)号：US20100077737A1

    公开(公告)日：2010-04-01

    申请号：US12242450

    申请日：2008-09-30

    申请人： James W. Girard ,  Giovanni Cavataio ,  Christine Kay Lambert ,  Rachel Alison Snow

    发明人： James W. Girard ,  Giovanni Cavataio ,  Christine Kay Lambert ,  Rachel Alison Snow

    IPC分类号： F01N3/20 ,  F01N3/035

    CPC分类号： B01D53/9409 ,  B01D53/9477 ,  B01D53/9495 ,  B01D2251/2062 ,  B01D2251/2067 ,  B01D2255/20738 ,  B01D2255/20746 ,  B01D2255/50 ,  B01D2255/9022 ,  B01D2258/012 ,  B01D2258/014 ,  F01N3/035 ,  F01N3/2066 ,  F01N3/208 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2370/04 ,  F01N2560/06 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24

    摘要： Systems and methods are provided for reducing NOx emissions from a vehicle including an engine having an exhaust. One example system comprises a NOx reducing system coupled to the engine exhaust, said NOx reducing system including a catalytic unit, said catalytic unit including a first zeolite catalyst with a first NOx conversion performance in a first temperature range and a second NOx conversion performance, lower than said first NOx conversion performance, in a second temperature range. The catalytic unit also comprises a second zeolite catalyst with a third NOx conversion performance, lower than said first NOx conversion performance, in the first temperature range and a fourth NOx conversion performance, higher than said second and third NOx conversion performances in the second temperature range, said first temperature range being higher than said second temperature range. The system further includes a controller configured to adjust an amount of reducing agent added to the NOx reducing system responsive to a temperature of the catalytic unit.

    摘要翻译： 提供了用于减少包括具有排气的发动机的车辆的NOx排放的系统和方法。 一个示例性系统包括耦合到发动机排气的NOx还原系统，所述NOx还原系统包括催化单元，所述催化单元包括在第一温度范围内具有第一NOx转化性能和第二NOx转化性能的第一沸石催化剂， 比所述第一NOx转化性能高的第二温度范围。 催化单元还包括在第一温度范围内具有低于所述第一NOx转化性能的第三NOx转化性能的第二沸石催化剂和高于第二温度范围内的所述第二和第三NOx转化性能的第四NOx转化性能 所述第一温度范围高于所述第二温度范围。 该系统还包括控制器，该控制器被配置为响应催化单元的温度来调节添加到NOx还原系统中的还原剂的量。