A Study of Decrease Oil Consumption for NSOR-Two-Ring Package Piston

• Published in: SAE transactions Vol. 100; no. 3; pp. 622 - 631
• Main Authors: Furuhama, Shoichi, Hyuga, Tetsu, Takiguchi, Masaaki, Serizawa, Shinji
• Format: Journal Article
• Language: English
• Published: New York, NY Society of Automotive Engineers, Inc 01-01-1991; Society of Automotive Engineers
• Subjects: Applied sciences; Cylinders; Deformation; Energy; Energy. Thermal use of fuels; Engines; Engines and turbines; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Fuel consumption; Gas flow; High pressure; Land distribution; Phase angle; Pistons; Pressure distribution; Consumption; Reduction; Flow(fluid); Flow rate regulation; Control system; Gasoline engine; Piston ring; Motor oil; Engine piston
• ISSN: 0096-736X; 2577-1531

Furuhama(1) proposed the new two ring package consist of a pressure ring and a narrow single-rail oil ring (NSOR) in 1985. Number of studies(2) have been done for the purpose of reducing the oil consumption (OC) in this ring package. However, OC reduction problem has been still remaining to solve as only one serious problem of this ring package. The reasons of a larger OC in the new ring package than the conventional three ring has been hardly understood, considering the OClarge since the fact that the oil film thickness is thicker than that of the oil ring. In this study, the mechanism of increase in new ring package was found out at last, as a result, of new ring package piston was improved up to the same level of conventional three ring package piston.