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

Abstract

This paper presents a mathematical model for piston skirts in mixed lubrication. It takes into account the effects of surface waviness, roughness, piston skirt surface profile, bulk elastic deformation and thermal distortion of both piston skirts 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. This paper is the first part of a series of two papers. It gives basic information and some preliminary results. The second part will include the major results and discussions, focused on the influences of elastic and thermal deformations.

An isogeometric analysis approach for solving the Reynolds equation in lubricated piston dynamics

“…Considering the lubrication between piston and cylinder, Zhu et al [4,5] and Liu et al [6] established the numerical model of piston dynamics coupled with hydrodynamics. The model describes the inertial dynamics of piston-cylinder system while taking lubricated film pressure obtained by solving the Reynolds equation into account.…”

Transient Tribo-Dynamics of Thermo-Elastic Compliant High-Performance Piston Skirts

“…Zhu et al [42,43] presented a two-part analysis. In the first part, they developed transient hydrodynamics of rigid bodies in contact.…”

The Influence of Cylinder Lubrication on Piston Slap

“…Many models have been developed to measure and/or predict this source of noise [17][18][19][20][21][22][23][24], and most of the recent models have considered the influence of the oil film on this type of impact. This work presents a study of the influence of a lubricant on piston slap and analyses the precision of Reynolds' theory for determining its force time history.…”