柴油氧化催化器性能的影响因素研究  

Research on Factors Influencing the Performance of Diesel Oxidation Catalysts

作　　者：贾春富 李路振 高涛 白凤月 王宠 樊惊辉 Jia Chun-fu;Li Lu-zhen;Gao Tao;Bai Feng-yue;Wang Chong;Fan Jing-hui(CATARC Automotive Test Center(Tianjin)Co.,Ltd.,Tianjin 300000)

机构地区：[1]中汽研汽车检验中心(天津)有限公司,天津300000

出　　处：《内燃机与配件》2024年第19期12-14,共3页Internal Combustion Engine & Parts

摘　　要：基于发动机台架进行柴油氧化催化器性能试验,研究了在发动机正常运转时DOC温升特性,出口温度变化受到空速和DOC入口温度的影响。空速(Space Velocity)、DOC入口排气温度对NO、CO和碳氢化合物对转化效率的影响,结果表明,在NO转化效率上1#DOC在250~450℃下空速越低转化效率越好,其中在175~350℃下转化效率随着温度得升高而增加,在375~450℃中转化效率随着温度升高而下降。2#DOC中可以看出在低温区域(175~275℃)空速越高转化效率越好,在300~450℃下空速越低转化效率越好。不同类型DOC对CO的转化效率在各温度下均在90%以上。两种DOC的THC转化效率1#DOC在300~400℃转化效率最高为90%,2#DOC在275~400℃转化效率最高为80%。Based on engine bench-scale Catalytic converter performance tests,it was studied that the temperature rise of DOC is not obvious when the engine is in normal operation,and the outlet temperature is affected by the airspeed and the inlet temperature of DOC.The effects of Space Velocity and exhaust temperature of Doc Inlet on the conversion efficiency of NO,CO and hydrocarbon were studied.The results showed that the conversion efficiency of 1#DOC at 250℃-450℃was better than that at 250℃-450℃at 175℃-350℃,conversion efficiency increased with increasing temperature,while at 375℃-450℃,conversion efficiency decreased with increasing temperature.The higher the airspeed,the better the conversion efficiency at low temperature(175℃-275℃),and the lower the airspeed,the better the conversion efficiency at 300℃-450℃.The CO conversion efficiency of different types of DOC was more than 90%at each temperature.The THC conversion efficiency of 1#Doc was 90%at 300℃-400℃,and that of 2#Doc was 80%at 275℃-400℃.

关 键 词：温升特性 转化效率 DOC 排温 空速(Space Velocity) 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]