The Measurement of oil film thickness of engine main bearing is very important to the design improvement of engine lubricating system and the evaluation of the quality of lubricating oil.

• 发动机主轴承油膜厚度的测量，对于发动机润滑系统的设计改进及润滑油品质的评定等是很有意义的，但受结构空间等因素的限制，也是很困难的。