Profiling the two-piece piston skirt of an ICE

Abstract

Тhe main directions of development of modern power engineering industry are increasing power, improving economic and environmental performance with high reliability of the engine. One of the main components affecting both the reliability of the piston engine and the power and economic performance is the cylinder-piston group. The article presents the piston skirt design methodology aimed at developing a design that provides a predominantly hydrodynamic mode of friction in the "piston skirt-cylinder" conjunction. Studies of the hydrodynamic parameters in the conjunction were performed taking into account the deformations of the piston skirt from hydrodynamic pressures and thermal loading, as well as the peculiarities of the secondary movement of the piston skirt. Computational and experimental studies were carried out using the ANSYS software package, the programs developed by the authors and the test stand. The results of studies performed for the two-piece piston skirt of a diesel engine piston are presented, on the basis of which, for the investigated skirt design the profile that provides mainly hydrodynamic lubrication in conjunction "piston skirt - cylinder" is proposed.