Lubrication Analysis of a Connecting-Rod Bearing in a High-Speed Engine. Part II: Lubrication Performance Evaluation for Non-Circular Bearings

Abstract

In this article a numerical investigation of a connecting rod bearing operating at 6,500 rpm is performed. This is a companion to an earlier article that took into account the effects of the inertial force and the variable bolt tension force, which are considered to be the principal factors that affect the connecting rod bearing lubrication characteristics of an engine running at high speed. It was found that a thinner minimum oil film and a larger peak hydrodynamic pressure are predicted in a deformed connecting rod bearing than in a rigid connecting rod bearing. Multi-peaked hydrodynamic pressure was found to appear as well because of two or more converging-diverging film regions.

Conformal elastohydrodynamic lubrication analysis for engine bearing design: A brief review

“…Very limited special studies include effects of journal elasticity [38] and bolt preload [45,49,50]. Two articles address explicitly the goal of optimum (product) design [15,34], while one considers strategies for the design of (numerical) experiments as a means to minimizing computational cost [57].…”

Analysis and Experimental Validation of the Tribological and Dynamic Characteristics of Journal Bearings

“…Therefore, it is of great importance to conduct an experiment and calculation study of the journal bearing characteristics on the tribology and the dynamics for a Stirling engine. There are three most important factors that influence the tribological and dynamic properties of the journal bearings: the dynamic properties of the moving parts, the tribological properties of the interface between the mating surfaces, and its experimental verification of the forces, which are very important but can hardly be measured directly in practice [3,4].…”

Analysis of non-Newtonian and piezoviscous effects in dynamically loaded connecting-rod bearings

“…Boedo and Booker's studies [14,15] represent significant contributions in dealing with EHD problems, applied to the connecting-rod bearing case. Wang et al [16,17] performed an interesting numerical investigation of a spark ignition engine connecting-rod bearing. They analysed the influence of the connecting-rod shape variation, of the inertia load, and of the variable bolt pretension on the bearing performance.…”