现代发动机技术对机油的性能要求已经远远超越了我们传统认为的润滑功能,要求机油除了满足传统润滑油的基本功能外,还要适用于现代缸内直喷、涡轮增压发动机,这要求机油能在一定程度上抑制直喷增压发动机的低速早燃问题润滑油,主要用于减少运动部件表面间的摩擦,同时对发动机具有冷却、密封、防腐、防锈、清洗杂质等作用。随着发动机技术的飞速发展,为应对日趋严格的环保、排放及节能法规要求,汽油发动机向缸内直喷、涡轮增压、小型化方向发展,同时低惯量涡轮的应 Modern engine technology on the performance requirements of oil has gone far beyond our traditional lubrication functions require oil in addition to meeting the basic functions of traditional lubricants, but also for modern direct injection cylinder, turbocharged engine, which requires oil To some extent, direct injection turbocharged engine to suppress low-speed pre-ignition problem of lubricating oil, mainly used to reduce the friction between moving parts surface, while the engine has a cooling, sealing, corrosion, rust, cleaning impurities and so on. With the rapid development of engine technology, in order to cope with the increasingly stringent environmental protection, emission and energy-saving regulations, gasoline engines are developed to direct injection, turbocharging and miniaturization in cylinders, and low inertia turbines