中文摘要：

在柴油-正丁醇混合燃料（正丁醇体积含量为40％）中添加了2％的硝酸异辛脂（EHN），并与柴油、柴油-正丁醇燃料做了燃烧和排放特性的对比。研究结果表明：EHN的添加可缩短滞燃期，降低缸内最高燃烧压力，燃烧噪声与纯柴油达到同一水平。在高废气再循环（EGR）率下，NO2排放增加，NO2所占比例升高。和纯柴油相比，碳烟排放峰值降低了80％，即EHN添加解决了低十六烷值含氧燃料在压燃发动机上的燃烧噪声和碳烟排放这一新的矛盾。EHN添加对CO和THC排放影响的规律相似，高EGR率时C0和THC排放都增加，且CH4比例急剧升高。

英文摘要：

2% ethylhexyl nitrate （EHN） was added into diesel-butanol blends （ n-butanol of 40% volumetric ratio）, referred to as B40 ＋EHN, and combustion and emissions characteristics were compared to those of pure diesel and diesel-butanol blend. Results show that by EHN addition ignition delay is shortened and max. in-cylinder pressure decreased. Combustion noise of B40＋EHN maintain the same level as diesel. At high exhaust gas recirculation （EGR） rate, NOx emissions and NO2 proportion increase. Compared to diesel, soot emissions of B40＋EHN decrease by 80%. EHN addition solves the trade-off between combustion noise and soot emissions for low cetane number oxygenated fuels used in compression ignition engine. EHN addition has similar effects on CO and THC emissions. At high EGR rate, CO, THC emissions and its CH4 proportion increase.