Simulation of EHD Lubrication of Common-Pin Conrod Big End Bearings in High Speed IC Engines

This paper describes a methodology for the analysis of elastohydrodynamics (EHD) of connecting-rod (conrod) big end bearings in high-speed internal combustion (IC) engines. In addition to the elasticity of the conrod structure and crankpin, the dynamic and inertial effect of conrod motion on the bearing tribological behaviour is considered realistically based on a multi-body system (MBS) approach. Results show that it is necessary to simulate two big end bearings of common-pin simultaneously with the inclusion of a complete crankthrow in the MBS model.