A comprehensive method of thermo-elastohydrodynamic lubrication analysis for connecting rod bearings is proposed, which includes thermal distortion as well as elastic deformation of the bearing surface. Lubrication film temperature is treated as a time-dependent, two-dimensional variable which is averaged over the film thickness, while the bearing temperature is assumed to be time-independent and three-dimensional. It is assumed that a portion of the heat generated by viscous dissipation in the lubrication film is absorbed by the film itself, and the remainder flows into the bearing structure. Mass-conserving cavitation algorithm is applied, and the effect of variable viscosity is included in the Reynolds equation. Simulation results of the connecting rod bearing of an internal combustion engine are presented. It is shown that the predicted level of the thermal distortion is as large as that of the elastic deformation and the bearing clearance, and that the thermal distortion has remarkable effects on the bearing performance. Therefore, the thermo-elastohydrodynamic lubrication analysis is strongly recommended to predict the performance of connecting rod bearings in internal combustion engines.
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July 2001
Technical Papers
Thermo-Elastohydrodynamic Analysis of Connecting Rod Bearing in Internal Combustion Engine
Byung-Jik Kim,
Byung-Jik Kim
Digital Appliance Research Laboratory, LG Electronics Inc., Seoul, Korea
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Kyung-Woong Kim
Kyung-Woong Kim
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Taejon, Korea
Search for other works by this author on:
Byung-Jik Kim
Digital Appliance Research Laboratory, LG Electronics Inc., Seoul, Korea
Kyung-Woong Kim
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Taejon, Korea
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division February 21, 2000; revised manuscript received January 4, 2001. Associate Editor: M. M. Khonsari.
J. Tribol. Jul 2001, 123(3): 444-454 (11 pages)
Published Online: January 4, 2001
Article history
Received:
February 21, 2000
Revised:
January 4, 2001
Citation
Kim, B., and Kim, K. (January 4, 2001). "Thermo-Elastohydrodynamic Analysis of Connecting Rod Bearing in Internal Combustion Engine ." ASME. J. Tribol. July 2001; 123(3): 444–454. https://doi.org/10.1115/1.1353181
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