A Numerical Analysis for Piston Skirts in Mixed Lubrication—Part I: Basic Modeling

This paper presents a mathematical model for piston skirls in mixed lubrication. It lakes into account the effects of surface waviness, roughness, piston skirl surface profile, bulk elastic deformation and thermal distortion of both piston skirls and cylinder bore on piston motion, lubrication and friction. The corresponding computer program developed can be used to calculate the entire piston trajectory and the hydrodynamic and contact friction forces as functions of crack angle under engine running conditions