It may effectively reduce the HC emissions to use a catalyst with low light-off temperature, close-coupled catalyst, HC traps, second air injection and electrically heated catalyst.
采用如低起燃温度催化剂、密耦催化剂、HC捕集器、二次空气注入和电加热催化剂等在内的排气后处理技术，可以有效地减少污染物尤其是HC的排放。
Controlling micro-structure of rate-earth mixed oxide and zeolite makes WFEC DOC possess excellent low temperature light-off performance with quite low PGM loading.
通过控制稀土材料、分子筛微观结构，使DOC以较低贵金属用量达到具有良好的低温活性。
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