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Analysis of Oil Film Temperature, Oil Film Thickness and Heat Transfer on a Piston Ring of a Diesel Engine
Technical Paper
2002-08-0401
Sector:
Event:
JSAE Autumn Conference
Language:
Japanese
Abstract
The effect of lubricant viscosity on the temperature and thickness in oil film on a piston ring in a diesel engine is analyzed by using unsteady-state thermohydrodynamic lubrication analysis, that is Reynolds equation and an unsteady-state, two- dimensional energy equation with heat generated from viscous dissipation. The oil film viscosity for multi-grade oil is then estimated by using the mean oil film temperature and the shear velocity. Moreover, the heat transfer at ring and liner surfaces is examined.