2022 年 67 巻 2 号 p. 130-125
It is necessary to further improve the thermal efficiency of internal combustion engine to reduce CO2 emissions. For a piston, it is important to understand the lubrication characteristics in order to reduce the friction of a piston skirt. In this paper, the clarification of the relationship between the oil film thickness and the frictional force is carried out to explain the friction-generating mechanism on a piston skirt during the operation of an engine mechanism.