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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。
Compared with the current emission limit of the second phase in the United States, the emission status of China General Purpose Small Gasoline Engine is not small, among which the emission of HC + NOx exceeds the maximum. Most domestic small gasoline engines coexist in two or four cycles with significant differences in emission characteristics , In the catalytic converter applications, to carry out targeted design.