张超，夏淳，方俊华，谢晓敏，黄震.汽油芳香烃含量对颗粒物排放及其微观理化特性的影响[J].内燃机工程,2018,39(1):8-14.
汽油芳香烃含量对颗粒物排放及其微观理化特性的影响
Effect of Aromatics on Concentration and Nanostructure of Particulate Matter from Gasoline Direct Injection Engine
DOI：
关键词:缸内直喷  汽油机  芳香烃  颗粒物  氧化活性  碳烟纳米结构
Key Words:direct injection  gasoline engine  aromatic  particulate matter  soot oxidation  soot nanostructure
基金项目:
作者单位
张超，夏淳，方俊华，谢晓敏，黄震 上海交通大学 动力机械与工程教育部重点实验室，上海 200240 
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摘要:基于国Ⅴ标准汽油，通过添加均三甲苯改变汽油中芳香烃的含量，在一台缸内直喷（GDI）汽油机台架上研究了汽油芳香烃含量对于GDI颗粒物（PM）排放及其微观理化特性的影响。研究结果表明：GDI PM排放随负荷增加而增加，在中低转速范围内随转速增加而降低；在高负荷下，芳香烃含量的增加会显著增加PM的排放并降低PM的氧化活性；芳香烃含量的增加促使PM前驱物增加，同时使碳层结构石墨化程度更高，阻止PM的二次氧化，从而增加了PM的排放。
Abstract:Particulate matter(PM) emissions and soot nanostructure were studied on a gasoline direct injection engine withmesitylene blended fuels based on China Ⅴ standard gasoline. The results indicate that PM emissions increase with load and decrease with the increase of speed over low and medium speeds. A higher proportion of aromatics will lead to higher PM emissions and lower oxidation of soot at high load. A higher proportion of aromatics will lead to more precursor and higher graphitic lamellae of soot, preventing PM from secondary oxidation, thus reducing PM emissions.
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