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http://dx.doi.org/10.9725/kstle.2008.24.2.055

A Study on Effects of the Changes in Lower Combustion Pressures and Pressure-Viscosity Index on Pin-Boss Bearing Lubrication of a Diesel Engine Piston Receiving High Combustion Pressure  

Chun, Sang-Myung (Dept. of Automotive Engineering, Hoseo University)
Publication Information
Tribology and Lubricants / v.24, no.2, 2008 , pp. 55-62 More about this Journal
Abstract
In recently designed diesel engines, the running conditions for piston pin bearings have become very severe due to combustion pressure and temperature increase. In this paper, it will be investigated the tendency of piston pin rotating motion by calculating the friction coefficient at piston pin bearings, the oil film thickness and the frictional torques induced by hydrodynamic shear stress. Finally, the pressure distributions on the oil film of piston pin bearings will be found by two-dimensional lubrication analysis in order to help the optimum design of the bearings of piston pin. Specially, it is investigated how the changes in combustion pressure at exhaust and intake stroke and the pressure-viscosity index effect on the film pressure distribution.
Keywords
piston pin of full floating type; rotating motion; friction coefficient; friction torque; piston pin boss; connecting rod small end;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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