内燃机磨合与表面改性实验研究

针对EQ6100型汽油机，利用内燃机磨合台架试验装置对所研制的内燃机专用磨合油与普通15W／40内燃机油进行对比磨合试验，对磨合油液进行直读铁谱分析，对缸套－活塞环磨合表面形貌及元素组成进行测试分析。结果表明：专用磨合油的磨合效果明显优于普通内燃机油；超细金刚石微粉可以加速磨合进程，分化并减小磨屑尺寸，从而避免缸壁拉伤和改善缸套－活塞环摩擦副的摩擦学特性。

Experimental Study of Running-in and Surface Modification of Internal Combustion Engine

Comparative running in bench test of EQ6100 engine was carried out to investigate the running in effect of conventional 15W/40 internal combustion engine oil and a specially formulated running in oil for the engine (coded as MR oil). A direct reading ferrograph TPD 2 was used to analyze the wear debris compositions of the tested oil sample after running in. The morphologies and elemental compositions of the surface of cylinder piston ring were observed and examined with a Talysurf 6 profilometer and a scanning electron microscope (SEM) equipped with energy dispersive spectrometer (EDAX). As the results, ultra dispersed diamond (UDD) in MR oil helps to accelerate the running in process and to smash larger wear debris in the running in oil to small ones, therefore to prevent the cylinder bore from abrasion by large hard wear debris. This contributes to improve the tribological properties of cylinder piston ring pair and the running in quality.