Connecting rod bearing EHD analysis including inertia effects due to the distributed rod mass 2007-24-0134
This paper attempts to address the limitations of quasi-static elastohydrodynamic (EHD) bearing lubrication analysis where the structural inertia of the distributed rod mass is neglected. A procedure is outlined where the big-end bearing distortions due to the structural inertia are pre-calculated using the finite element (FE) method and then included in a subsequent EHD analysis via a dynamic deformation file. The effect on results in terms of oil film thickness and pressure are investigated for a 2.0L gasoline engine. A validation is presented showing good comparison of the EHD bore shape with an instrumented engine test and also a full dynamic FE model. The conclusion is made that distributed inertia effects become significant above 3000rpm and that the outlined method is valid for including such effects.
Citation: Merritt, D., Mian, O., and Wang, D., "Connecting rod bearing EHD analysis including inertia effects due to the distributed rod mass," SAE Technical Paper 2007-24-0134, 2007, https://doi.org/10.4271/2007-24-0134. Download Citation
Author(s):
David R Merritt, Omar Mian, Ducai Wang
Affiliated:
Mahle Engine Systems
Pages: 9
Event:
8th International Conference on Engines for Automobiles
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Connecting rods
Bearings
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