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Elastohydrodynamic Analysis of the Conrod Small-End of a High Performance Motorbike Engine via a Mass Conserving Cavitation Algorithm

Excerpt

In this contribution a complementarity formulation for the solution of EHL problem in presence of cavitation is employed in order to investigate the tribological behavior of the conrod small-end of a high performance motorbike engine. The influence of different physical and geometrical parameters is discussed. In particular, the clearance between the conrod small-end and the piston pin, the lubricant physical properties, the surface roughness and the stiffness of the piston pin are investigated, thus providing preliminary guidelines for the correct design of the coupling. Due to the negligible influence of the transversal forces acting on the conrod small-end and of the relative sliding speed between the mating surfaces, a two symmetrical model of the assembly is prepared and results are compared with those obtained adopting a simply symmetrical model.

Introduction
Nomenclature
Complementarity Formulation of the Reynolds Equation
Elastic Deflection
Mixed Lubrication
Application
Governing Equation
Oil Supply Hole
Oil Model
Elastic Deflection
Numerical Algorithm
External Load
Bearing Data and Boundary Conditions
Results
Conclusions
References

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