In the case of engine bearings, pressure in a cylinder is necessary for the analysis of lubrication. In this study, a cycle simulation of gasoline engines has been developed to predict the pressure in the cylinder under the wide range of engine operation. In the cycle simulation, intake and exhaust processes are included and combustion process is calculated with flame propagation based on burning velocity. Here, the equation of ignition delay and the equation of burning velocity were determined with experimental results of a gasoline engine over wide A/F ratio. The pressure in the cylinder over the engine cycle is introduced into an elastohydrodynamic lubrication analysis of a con-rod bearing to calculate the load on the bearing in addition to the inertia force. Orbital movement, minimum film thickness, and power loss in the bearing were estimated over the wide range of engine operation. This method is useful to clarify the effects of the design and operation parameters of engines on the lubrication of bearings without experimental pressure data.
Lubrication Analysis of a Con-Rod Bearing Using a Cycle Simulation of Gasoline Engines with A/F Variation
Sae Int. J. Fuels Lubr
Sae International Journal of Fuels and Lubricants
SAE International Powertrains, Fuels and Lubricants Meeting ; 2011
Sae International Journal of Fuels and Lubricants ; 5 , 1 ; 434-446
2011-08-30
13 pages
Conference paper
English
LUBRICATION STUDIES OF TWO-CYCLE GASOLINE ENGINES
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