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Connecting rod bearing EHD analysis including inertia effects due to the distributed rod mass
Technical Paper
2007-24-0134
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
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.
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Authors
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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.Also In
References
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