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    • 1. 发明申请
    • METHOD AND ARRANGEMENT FOR PURIFYING EXHAUST GAS IN AN INTERNAL COMBUSTION ENGINE
    • 在内燃机中净化排气的方法和装置
    • US20070101701A1
    • 2007-05-10
    • US11459103
    • 2006-07-21
    • Fillip AckeRoger TengbladJohn KorsgrenMaria Karlsson
    • Fillip AckeRoger TengbladJohn KorsgrenMaria Karlsson
    • F01N3/00
    • F02D41/029B01D53/9431B01D53/9495B01D53/96F02D41/028F02D41/405
    • The invention relates to a method for purifying exhaust gas in an internal combustion engine provided with an LNT (and a particulate matter filter arranged in an exhaust gas conduit of said engine, comprising de-sulfurisation of said LNT and regeneration of said particulate matter filter. The invention comprises the following steps: initiating a heating phase wherein the engine is set to generate heat sufficient for said de-sulfurisation and said regeneration; initiating a de-sulfurisation phase during a first time period (t1), in which the engine is set to generate a rich exhaust gas in said exhaust gas conduit; keeping said first time period below a first maximum value so as to avoid release of emissions of H2S from said engine; initiating a regeneration phase during a second time period, in which the engine is set to generate a lean exhaust gas in said exhaust gas conduit; keeping said second time period below a second maximum value so as to avoid thermal damage to said particulate matter filter; and repeating said de-sulfurisation phase and said regeneration phase in a periodical manner.
    • 本发明涉及一种在内燃机中净化废气的方法,所述内燃机设置有LNT(以及布置在所述发动机的排气管道中的颗粒物过滤器,包括所述LNT的脱硫和所述颗粒物过滤器的再生。 本发明包括以下步骤:启动加热阶段,其中发动机被设置为产生足以用于所述脱硫和所述再生的热量;在第一时间段内启动脱硫阶段(t 1> ),其中所述发动机被设置为在所述废气管道中产生浓的废气;将所述第一时间段保持在第一最大值以下,以避免H 2 S 2的发射从所述 发动机;在第二时间段期间启动再生阶段,其中发动机被设置为在所述排气管道中产生贫排气;将所述第二时间段保持在第二最大值以下,以避免热损坏 e到所述颗粒物过滤器; 并以周期性方式重复所述脱硫阶段和所述再生阶段。