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汽油组成比喷气燃料和柴油简单 ,天然极性杂质含量也特别低 ,这对于研究燃料中主体烃组分对燃料润滑性的贡献 ,并与杂质的贡献区分开来是有利的。根据前文归纳的详细汽油组成数据 ,挑选代表汽油不同组分的纯化合物 ,进一步提纯 ,研究其对汽油润滑性的贡献。结果表明 ,由汽油主要成分烷烃、单烯烃和单环芳烃引起的磨损随粘度的增加而下降。尽管这 3类化合物的化学结构不同 ,但只要粘度接近 ,磨损就几乎相同。含氧掺和剂MTBE在商品汽油通常的含量范围下总是增大磨损。纯双环芳烃本身虽然磨损较小 ,但加到基础油中则会增大磨损。双烯的抗磨作用最为显著。
Gasoline compositions are simpler than jet fuels and diesel oils and have exceptionally low levels of natural polar impurities, which is advantageous for studying the contribution of the main hydrocarbon component of a fuel to fuel lubricity and to distinguish it from the contribution of impurities. Based on the detailed gasoline composition data summarized above, pure compounds representing different components of gasoline were selected for further purification to study their contribution to gasoline lubricity. The results show that the wear and tear caused by the main components of gasoline, alkanes, monoolefins and monocyclic aromatic hydrocarbons, decreases with the increase of viscosity. Although the chemical structures of these three classes of compounds are different, as long as the viscosities approach, the wear is almost the same. Oxygen-containing admixture MTBE always increases wear in the typical range of commercial gasoline. Although pure bicyclic aromatic hydrocarbons wear less, but added to the base oil will increase the wear and tear. The anti-wear effect of diene is the most significant.