汽油车冷起动排气后处理技术  

The aftertreatment technology for cold-start emissions of gasoline vehicles

作　　者：姚青[1] 田群[1] 陈宏德[1] 

机构地区：[1]中国科学院生态环境研究中心,北京100085

出　　处：《环境污染治理技术与设备》2005年第4期53-57,共5页Techniques and Equipment for Environmental Pollution Control

摘　　要：为满足即将实施密耦催化剂的国家第3阶段排放标准,汽油车排气冷起动问题显得尤为重要。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。多种处理技术的结合和系统优化能够满足更加严格的排放标准。It is very important to deal with HC emissions during cold-start phase of gasoline vehicles, especially to meet requirements of EURO 3 phase emission regulation. 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.Combination of many treatment techniques and system perfection can meet more stringent regulations.

关 键 词：排气后处理技术 冷起动 汽油车 排放标准 低起燃温度 催化剂 二次空气 系统优化 捕集器 电加热 污染物 HC 

分 类 号：U464.134.4[机械工程—车辆工程] U464.142.3[交通运输工程—载运工具运用工程]