PREDICTING FRICTIONAL LOSSES GENERATED BY PISTON CONNECTING-ROD BIG END JOURNAL BEARING FOR AN INTERNAL COMBUSTION ENGINE
Keywords:
Tribological, Journal bearing, Numerical analysis, Rigid, DeformationAbstract
The aim of the study is to investigate the tribological behaviour of the connecting-rod big end journal bearing under dynamic loading for a full engine cycle.In this study, a numerical analysis is used for solving the 2-D Reynolds equation based on Reynolds boundary condition. The 2-D Reynolds solution was derived by using a combination of approaches, namely finite difference method, Newton-Raphson method, and Taylor expansion series. Then, the formulated 2-D mathematical model is used to ascertain the tribological behaviour for both rigid and deformable bearing assumptions.For low loading conditions, the simulation results from both rigid and deformation models have only shown minor differences, demonstrating correlation with existing analytical and experimental results. However, once the loading capacity is increased, the simulation results from the deformation model assumption is shown to be much closer to the experimental results obtained from real engine analysis.In short, an elastic journal bearing assumption in simulating such tribological conjunction is believed to be more practical and reliable for real engine practices as compared to a rigid journal bearing assumption.
References
Chong, W.W.F., Ng, J.-H., Rajoo, S., & Chong, C.T. (2018). Passenger transportation sector gasoline consumption due to friction in Southeast Asian countries. Energy conversion and management, 158, 346-358.
Chong, W.W.F., & De la Cruz, M. (2014). Elastoplastic contact of rough surfaces: a line contact model for boundary regime of lubrication. Meccanica, 49(5), 1177-1191.
Chong, W.W.F., Teodorescu, M., &Rahnejat, H. (2014). Mixed thermo-elastohydrodynamic cam–tappet power loss in low-speed emission cycles. International Journal of Engine Research, 15(2), 153-164.
Chu, J.H. (2017).A Friction Study on Automotive Connecting-Rod Big End Journal Bearing Lubrication System. UGP Thesis,UniversitiTeknologi Malaysia, Skudai.
Holmberg, K., Andersson, P., &Erdemir, A. (2012). Global energy consumption due to friction in passenger cars. Tribology International, 47, 221-234.
Khonsari, M.M. and Booser E.R. (2008).Applied Tribology – Bearing Design and Lubrication, 2nd Edition. John Wiley & Sons, Ltd Publishing.
Oh, K. P., &Goenka, P. K. (1985). The elastohydrodynamic solution of journal bearings under dynamic loading. Journal of Tribology, 107(3), 389-394.
Paranjpe, R. S., Tseregounis, S. I., & Viola, M. B. (2000). Comparison between theoretical calculations and oil film thickness measurements using the total capacitance method for crankshaft bearings in a firing engine. Tribology transactions, 43(3), 345-356.
Rahnejat, H. (2010). Tribology and dynamics of engine and power train.Woodhead Publishing Limited.
Wang, D., Keith, T. G., Yang, Q., & Kumar, V. (2004). Lubrication analysis of a connecting-rod bearing in a high-speed engine. Part I: rod and bearing deformation. Tribology transactions, 47(2), 280-289.
Downloads
Published
How to Cite
Issue
Section
License
Copyright of articles that appear in Journal of Transpot System Engineering (JTSE) belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions or any other reproductions of similar nature.
Disclaimer: The views and opinions expressed in the articles are those of the authors and do not necessarily reflect the official policy or position of the JTSE. Examples of analysis performed within are only examples and they should not be utilized in real-world. Assumptions made within the analysis are not reflective of the position of any JTSE entities.