Method for determining minimum lubricating oil-film thickness under operating engine conditions using electrical capacitance

摘要

This invention relates to a method for determining the minimum oil-film thickness of a lubricating oil composition under engine operating conditions using selected electrical capacitance means wherein a potential relating to the capacitance is developed across an electrically isolated bearing and crankshaft, said capacitance being converted through a derived formula to the minimum oil-film thickness at the particular time the potential is being applied.