【摘要】 通过热管试验考察了两个不同ⅢG发动机试验油清净性的变化,考察了不同基础油以及在不同气氛下基础油清净性的变化,用GC-MS、FTIR对基础油及热管试验后油进行了组成分析。研究发现:热管试验可以区分这两个不同的ⅢG发动机试验油的清净性能;Ⅰ类基础油清净性能差,Ⅱ类、Ⅲ类、Ⅳ类基础油清净性能较好;氧气的存在使基础油在老化过程中水的含量、芳烃含量、氧化物含量增多,导致油品清净性变差。更多还原

【Abstract】 Hot tube test was used to determine the detergency of engine oils. The detergency of two ⅢG engine test oils,API groupⅠ,group Ⅱ,group Ⅲ,and group Ⅳ base oils were determined. The compositions of base oils were analyzed by GC-MS,and the oils after hot tube test were detected by FTIR. The tests results show that the hot tube test can distinguish the detergency of two ⅢG engine test oils. The detergency of group Ⅱ,group Ⅲ,and group Ⅳ base oils is better than that of group Ⅰ. The oxidation of the base oils is the main factor that make the detergency of the base oils get worse.更多还原