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在用共轨柴油机燃用沪四柴油的超细颗粒排放 被引量:4

Ultrafine Particle Number Emission and Size Distribution of an On-used Common Rail Diesel Engine Fueled with Shanghai IV Diesel
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摘要 以一台满足国Ⅲ排放的在用车共轨柴油机为试验样机,采用排气颗粒数量及粒径分析仪,研究了该机燃用国二柴油和沪四柴油欧洲稳态工况(ESC)循环下的超细排气颗粒数量和粒径分布特性.结果表明:ESC循环A,B,C转速工况下,随着发动机负荷的增加,该机燃用国二柴油、沪四柴油的超细颗粒数量排放降低;燃用国二柴油超细颗粒的粒径分布呈双峰对数分布,除怠速工况外,燃用沪四柴油超细颗粒的粒径分布呈单峰对数分布;与国二柴油比较,该机燃用沪四柴油超细颗粒总颗粒数量、核态颗粒数量排放降低,排气颗粒的几何平均粒径增大. An on-used common rail diesel engine which met the national standard Ⅲ of China was used as the test prototype, and the number and size distribution characteristics of ultrafine particle of the diesel engine fueled with China Ⅱ and Shanghai Ⅳdiesel were carried out respectively under Europe steady state cycle (ESC), by using an engine exhaust particle sizer (EEPS). The test result shows that the particle number emission of the diesel engine fueled with either China Ⅱ or Shanghai Ⅳ diesel at A, B, and C speed cases of ESC reduces respectively as the load increases. The exhausted particle size distribution of the engine fueled with China Ⅱ diesel is obviously in bimodal logarithmic distribution whereas it is in unimodal logarithmic distribution when the engine is fueled with Shanghai Ⅳdiesel under ESC except for idle case. Compared with China Ⅱdiesel, the total ultrafine particle number emission, the nucleation mode particle number emission of the diesel enginereduce together, while geometric mean diameter of the exhaust particle becomes larger. Therefore, the engine's nucleation particle number emission reduces obviously when the engine is fueled with Shanghai Ⅳdiesel.
出处 《同济大学学报(自然科学版)》 EI CAS CSCD 北大核心 2013年第11期1721-1725,共5页 Journal of Tongji University:Natural Science
关键词 共轨柴油机 柴油 超细颗粒 颗粒数量 common rail diesel engine diesel ultrafineparticle particle number
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