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A Numerical Analysis of Tribology and Heat Transfer on a Piston Ring of an IC Engine: Effect of Cycle Variation of Ring Surface Temperature
Published October 27, 2004 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
The effect of cycle variation of ring surface temperature on the temperature and thickness in oil film on a piston ring in an internal combustion engine was analyzed by using an unsteady state thermohydrodynamic lubrication analysis, i.e., Reynolds equation, unsteady and two-dimensional energy equation with heat generated from viscous dissipation for the oil, and unsteady and two-dimensional form of the heat- conduction equation for the ring. Moreover, the heat transfer at ring and liner surfaces, and around the ring was examined. As a result, the lubricated surface temperature of the ring varies about 4°C in a cycle, but the oil film thickness is the almost same variation as the case of the ring surface temperature constant.