铁基燃油添加剂对柴油机颗粒排放影响的试验研究

基于发动机试验台架，对柴油中添加微量的铁基燃油添加剂进行了试验，从颗粒物数量浓度和粒径的分布特性、排气烟度、颗粒物的氧化特性等方面研究了燃油添加剂对柴油机颗粒物排放的影响。研究结果表明：燃油添加剂能降低柴油机排气温度和排气烟度。加入添加剂后，核模态颗粒数量浓度增加，峰值粒径也增加；积聚态颗粒数量浓度无明显变化；颗粒物总数量浓度增加，但添加剂浓度对颗粒数量浓度影响较小。添加剂使颗粒物中SOF含量增加，同时也使得微粒的氧化表观活化能和起燃温度都降低。

Experimental Investigation on Influence of Fe-based Fuel Additive on Diesel Engine Particle Emission

Through adding a little Fe‐based fuel additive into diesel fuel ,the influences of additive on particle number concen‐tration ,size distribution ,exhaust smoke and oxidation of particulate matter were researched on a test bench .The results show that both engine exhaust temperature and exhaust smoke decrease after adding the fuel additive .The number concentration and peak size of nuclear mode particle increase and the number concentration of accumulation mode particle hardly changes .The ad‐dition of fuel additive leads to the increase of total number concentration of particle ,but additive concentration has little influ‐ence on number concentration .In addition ,the fuel additive leads to the increase of SOF content in particle and the decrease of intrinsic activation energy and ignition temperature of particle oxidation .