Elastohydrodynamic Lubrication Model of Connecting Rod Big-End Bearings: Application to Real Engines

[+] Author and Article Information
Toshihiro Ozasa, Takashi Noda

Toyota Central R&D Labs., Inc., Nagakute Aichi-ken, 480-11, Japan

Toshiaki Konomi

Toyota Motor Corp., Susona Shizuoka-ken, 410-11, Japan

J. Tribol 119(3), 568-578 (Jul 01, 1997) (11 pages) doi:10.1115/1.2833538 History: Received May 03, 1995; Revised May 22, 1996; Online January 24, 2008


This study presents an elastohydrodynamic (EHD) lubrication model of connecting rod big-end bearings developed taking into consideration the effects of inertia and oil holes. In this model, the effect of inertia, namely the body force, on load and deformation is practically and rationally expressed based on engine dynamics and a structural model of a connecting rod. A method of defining the deformation of bearings has been proposed to simplify numerical analysis. The effect of oil holes, namely an oil feed hole in a journal and an oil jet hole in a bearing, is considered as a boundary condition in the EHD lubrication theory. Calculations of oil flow rate and power loss are also included.

Copyright © 1997 by The American Society of Mechanical Engineers
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