A numerical model for calculation of piston rings wetted area in a combustion engine

• Autorzy: Guzik M. , Koszałka G. , Niewczas A.
• Języki publikacji: EN

Abstrakty

EN

Assumptions made while modelling the oil film between the ring and the cylinder liner in IC engines, especially concerning the boundaries of the wetted area of the ring face surface, were discussed and the assumptions adopted for the developed model were presented in this study. It was assumed that the model should take into account partially flooded lubrication, which meant that the boundaries of the ring wetted area had to be determined. Based on the adopted assumptions, a model for calculation of the oil film thickness between the cylinder and moving rings, and thickness of the oil film left on the cylinder by the ring pack was developed. A computer application operating in the Windows operation system was developed to carry out numerical calculations. The results of initial numerical calculations were also presented. The proposed model can be utilized to determine the effects of the ring pack geometry, especially the geometry of the ring surface, on parameters of lubrication. These parameters, including the oil film thickness, distribution of pressure in oil film or tangential force, are crucial for friction and wear of cooperating surfaces, oil consumption, and flow of gas from the combustion chamber to the crankcase, thus playing a role in the durability, fuel consumption and emission of an engine.

Słowa kluczowe

EN

combustion engine; ring pack; lubrication; simulation; wear; mechanical losses

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2012
• Tom: Vol. 19, No. 3
• Strony: 156--164
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Guzik M.

autor

Koszałka G.

autor

Niewczas A.

• University of Economics and Innovation in Lublin Melgiewska Street 7-9, 20-209 Lublin,

Bibliografia

• [1] Han, D-Ch., Lee, J-S., Analysis of the piston ring lubrication with a new boundary condition, Tribology International, Vol. 31, No. 12, pp. 753–760, 1998.
• [2] Harigaya, Y., Suzuki, M., Takiguchi, M., Analysis of oil film thickness on a piston ring of diesel engine: Effect of oil film temperature, Trans. ASME, Vol. 125, pp. 596–603, 2003.
• [3] Keribar, R., Dursunkaya, Z., Flemming, M. F., An integrated model of ring pack performance, Journal of Engineering for Gas Turbines and Power, Trans. ASME, Vol. 113, pp. 382–389, 1991.
• [4] Koszałka, G., Application of the piston-rings-cylinder kit model in the evaluation of operational changes in blowby flow rate, Eksploatacja i Niezawodność – Maintenance and Reliability No 4(48), pp. 72–81, 2010.
• [5] Koszałka, G., Niewczas, A., Guzik, M., Predicted and Actual Effect of Cylinder Liner Wear on the Blowby in a Truck Diesel Engine, SAE Paper 2008-01-1717, 2008.
• [6] Priest, M., Dowson, D., Taylor, C. M Theoretical modeling of cavitation in piston ring lubrication, Proc. Instn. Mech. Engrs., Vol. 214, pp. 435–447, 2000.
• [7] Wannatong, K., Chanchaona, S., Sanitjai, S., Simulation algorithm for piston ring dynamics, Simulation Modelling Practice and Theory 16, pp. 127–146, 2008.
• [8] Wolff, A., Piechna, J., Numerical simulation of piston ring pack operation Proceedings of the International Congress on Combustion Engines, Paper PTNSS P05-C076, Bielsko-Biała 2005.