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    Process for regenerating a nitrogen oxides storage catalyst
    1.
    发明公开
    Process for regenerating a nitrogen oxides storage catalyst 有权
    Verfahren zur Regenerierung eines Stickoxid-Speicherkatalysators

    公开(公告)号：EP1386656A1

    公开(公告)日：2004-02-04

    申请号：EP02017245.8

    申请日：2002-07-31

    申请人： Umicore AG & Co. KG

    发明人： Rohr, Friedemann, Dr. ,  Kattwinkel, Peter ,  Peter, Stefan Dietrich, Dr. ,  Kreuzer, Thomas, Dr. . ,  Lox, Egbert, Dr.

    IPC分类号： B01D53/94 ,  F01N3/18

    CPC分类号： F02D41/0275 ,  B01D53/9495 ,  B01D53/96 ,  F01N3/0885 ,  F01N2430/06 ,  F01N2560/026 ,  Y02T10/20

    摘要： The present invention provides a process and a device for regeneration of a nitrogen oxides storage catalyst arranged in the exhaust system of a diesel engine. The process comprises a first and a second regeneration strategy wherein the first regeneration strategy is applied when the exhaust gas temperature is above a threshold value and comprises changing the air/fuel ratio from a lean to a rich value during a first regeneration period and wherein the second regeneration strategy is applied when the exhaust gas temperature is below said threshold value and comprises switching the air/fuel-ratio between said lean and said rich air/fuel-ratio back and forth forming a sequence of rich/lean-pulses with a number of 2 to 10 rich/lean pulses during a second regeneration period.

    摘要翻译： 本发明提供一种用于再生设置在柴油发动机的排气系统中的氮氧化物储存催化剂的方法和装置。 该方法包括第一和第二再生策略，其中当废气温度高于阈值时应用第一再生策略，并且包括在第一再生期间将空气/燃料比从贫值改变为富价值，并且其中 当废气温度低于所述阈值时，应用第二再生策略，并且包括以前述的方式切换所述贫和富空燃比之间的空气/燃料比，从而形成具有数量的富/稀脉冲序列 在第二再生期间为2至10个富/稀脉冲。