Thermo-elastohydrodynamic analysis of piston connecting-rod big end journal bearing lubrication system. Journal of Transport System Engineering, 7 (2). pp. 1-21. ISSN 2289–9790 (2020)
Abstract
The existence of friction could be both detrimental and beneficial. On the one hand, friction prevents slipping on a moving vehicle but on the other hand, friction induces by the engine tends to reduce the power. In an engine, friction can be reduced by introducing an effective lubrication system. Hence, the aim of the present study is to derive a thermo-elastohydrodynamic mathematical model to predict lubricant film formation properties along the piston connecting-rod big end journal bearing lubrication system. A thermo -elastohydrodynamic mathematical model is implemented by integrating an Energy equation with2-D Reynolds equation to solve the lubricant film formation along the piston connecting-rod big end journal bearing. It is used to deduce the tribological properties of the lubricant, namely contact pressure and film profile. Under isothermal condition with increasing lubricant viscosity, both pressure hydrodynamic and film thickness increase. Similar results are demonstrated when there is an increase in the velocity or applied normal load. Under thermal condition, the viscous heating generated during the engine operation tends to increase the temperature, leading to the reduction of lubricant viscosity and film thickness. The mathematical model is simulated and compared with the literature data obtained. However, the simulated results do not correlate well with the literature data although the mathematical model is capable in predicting film thickness in the similar range. This could be due to the underestimation on the effect of transient squeeze film effect in this model.
| Item Type: | Article |
|---|---|
| Keywords: | Thermo-elastohydrodynamic, 2-D Reynolds equation, 2-D energy equation, Contact pressure, Film profile |
| Taxonomy: | By Subject > College of Engineering > Mechanical Engineering > Automotive By Subject > College of Engineering > Mechanical Engineering > Mechanics |
| Local Content Hub: | Subjects > College of Engineering |
| Depositing User: | Eza Eliana Abdul Wahid |
| Date Deposited: | 24 Nov 2022 09:18 |
| Last Modified: | 24 Nov 2022 09:18 |
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