The Effect of the Position and Number of Oil Drain Hole on the Oil Pressure Generating under the Oil Ring with Relation to Oil Consumption
エンジンのオイル消費に関係するオイルリング下の 油圧発生メカニズムおよびその低減方法に関する研究

Hiroki Hasegawa, Koji Kikuhara, Shunsuke Nishijima, Hidekazu Suzuki, Akemi Ito, Hiroshi Sekiya, Hirotaka Akamatsu
2017 Transactions of Society of Automotive Engineers of Japan  
Oil drain holes of a piston affects engine oil consumption, but there is no theoretical guidance for optimal design. This study aimed for clarifying the effect of design of oil-drain-hole on oil behavior under the oil-ring to estimate mechanism for oil pressure generating. The oil pressure variations under the oil-ring in the circumferential direction was measured using a gasoline engine. An increase in oil pressure was found during down-stroke of the piston. The lowest oil pressure was found
more » ... en the piston with four oil-drain-hole. Two holes set nearly front / near end of the piston-skirt showed relatively lower pressure.
doi:10.11351/jsaeronbun.48.59 fatcat:a4khlpfubvc3da7pyy3gu3oo3y