国产通用型汽油机的排放现状及催化转化器的应用

The Current Situation of Emissions from Domestic-made Conventional-type Small Petrol Engine and Application of Catalystic Converter

中国通用小型汽油机的排放现状与美国现行的第二阶段排放限值相比有不小的差距,其中HC+NOx排放超标居多;国产通用小型汽油机二、四冲程并存,且排放特点有显著的差异,在进行催化转化器应用时,要进行针对性设计。

There is a big difference between Chinese conventional type small petrol engine and American ones in emission limits, especially the limit of HC + NOx There coexist small engines of 2 and 4 stroke types with greater difference in emission characteristics. When catalystic conversion used, a directional design is needed.