Bubble Behavior in Engine Lubricant

Abstract

Air bubbles in engine oil cause the serious issues, while high flow rate of the oil is circulated in resent engines lubrication system. In this study, the authors developed the bubble measurement technique based on image processing and analysis. This technique enables bubble diameter distribution and oil aeration rate to be measured without oil sampling. This measurement technique was applied to the operating engine and the bubble behavior in each lubrication passage was observed.