Browse Publications Technical Papers 2019-01-2360
2019-12-19

A Study on the Function of Oil Drain Holes in the Oil Ring Groove of a Piston and Their Effect on Oil Consumption 2019-01-2360

Clarifying the mechanism of oil transporting upward at around an oil ring of a piston is necessary for calculating engine oil consumption. This study aimed to clarify the function of oil drain holes in the oil ring groove of a piston. The effect of the oil drain holes in the groove on oil consumption was investigated. Also the pressure balance around the oil ring was measured. It was found that the drain holes in the groove lowered oil consumption. It was assumed that lower pressure in the groove with the drain holes caused less oil flow into the third land.

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