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1. 发明申请

US20070101701A1 METHOD AND ARRANGEMENT FOR PURIFYING EXHAUST GAS IN AN INTERNAL COMBUSTION ENGINE 有权
标题翻译：在内燃机中净化排气的方法和装置
公开(公告)号：US20070101701A1
公开(公告)日：2007-05-10
申请号：US11459103
申请日：2006-07-21
申请人： Fillip Acke , Roger Tengblad , John Korsgren , Maria Karlsson
发明人： Fillip Acke , Roger Tengblad , John Korsgren , Maria Karlsson
IPC分类号： F01N3/00
CPC分类号： F02D41/029 , B01D53/9431 , B01D53/9495 , B01D53/96 , F02D41/028 , F02D41/405
摘要： 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.
摘要翻译：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。

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