生物柴油混合燃料对车用高压共轨柴油机微粒排放粒度分布的影响  

Effect of Biodiesel Blended Fuel on Particulate Matter Size Distribution in Common-Rail Diesel Engine Emission

作　　者：赖春杰[1] 孙万臣[1] 李国良[1] 谭满志[1] 陈士宝[1] 邹明森[2] 

机构地区：[1]吉林大学汽车动态模拟国家重点实验室,吉林长春130025 [2]江苏省交通技师学院汽车工程系,江苏镇江212006

出　　处：《汽车工程学报》2011年第1期53-59,共7页Chinese Journal of Automotive Engineering

基　　金：国家自然科学基金资助项目(50876039);吉林省科技发展计划重点项目(20080349)

摘　　要：试验研究了不同添加比例的生物柴油(BTL)混合燃料对高压共轨柴油机微粒(PM)排放的影响,分析了BTL/柴油混合燃料PM粒度分布特征,揭示了BTL添加比例对柴油机PM排放粒度分布的影响规律。结果表明:高压共轨柴油机PM排放粒径绝大部分在300nm以下,BTL燃料PM粒度分布呈双峰结构,以小粒径核态PM为主,占PM总数的60%以上,随BTL添加比例增加,核态PM数量增多,50nm以上的积聚态PM减少且峰值区域向小粒径方向偏移;石化柴油燃料PM粒度分布呈单峰结构,峰值区域在50～100nm之间,积聚态PM居多。负荷对PM粒度分布影响较大,随着负荷增加核态PM所占比例逐渐减小。The effect of biomass to liquids （BTL） biodiesel blended fuel with different component proportions on the particulate matter （PM） emission from a common-rail diesel engine was investigated. Moreover, the features of particle size distribution were analyzed and the effect of BTL fuel fraction on the particle size distribution was obtained. The results show that the particle size is mostly under 300 nm and a bimodal distribution of the particle size is observed. The amount of small nuclear mode PM reaches 60%. With increasing BTL fuel fraction the total number of PM grows, the amount of accumulation mode PM above 50 nm decreases and the peak regions appear at smaller particle size. For conventional diesel fuel, the particle size forms a unimodal distribution, the peak regions are between 50 ＂-~ 100 nm and the PM are mostly in accumulation mode. The engine load also has a great impact on particle size distribution. The percentage of nuclear mode PM decreases with the increase of engine load.

关 键 词：高压共轨柴油机 生物柴油(BTL) 微粒(PM)排放 粒度分布 

分 类 号：U473.1[机械工程—车辆工程]