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Modeling the Impact of Piston Rings on Oil Consumption of Internal Combustion Engines
Raffai, Peter ; Pavlov,, Michal (oponent) ; Dr. Dan E. Richardson (oponent) ; Kučera, Pavel (oponent) ; Novotný, Pavel (vedoucí práce)
Within the frame of the present work a complex simulation tool was developed, built on strong physical and chemical foundations, supplemented with the appropriate mathematical approaches. The resulting software is capable of determining the performance of a piston ring pack by addressing all key mechanisms and their mutual influence during standard operating conditions of a piston ring. The outputs of the simulation were designed in accordance with industrial interest, like the volumetric gas flow through the piston assembly, the friction power losses and the lubricant oil consumption from the sources, which are affected by the piston ring pack. Besides the development of the simulation model, experiments were conducted with the intention of input data obtainment and results validation on an inline three-cylinder engine. Sample results were shown by applying the model to the parameters of the experimental engine. Possible industrial application of the source code is demonstrated with parameter studies. The work carried out within the frame of this doctoral dissertation was intended to fill the gap in the research area of combined simulation tools, able to support the needs of piston ring manufacturers and engine research centers, to calculate the impact of design parameter changes on friction losses and lubricant oil consumption simultaneously.
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Modeling the Impact of Piston Rings on Oil Consumption of Internal Combustion Engines
Raffai, Peter ; Pavlov,, Michal (oponent) ; Dr. Dan E. Richardson (oponent) ; Kučera, Pavel (oponent) ; Novotný, Pavel (vedoucí práce)
Within the frame of the present work a complex simulation tool was developed, built on strong physical and chemical foundations, supplemented with the appropriate mathematical approaches. The resulting software is capable of determining the performance of a piston ring pack by addressing all key mechanisms and their mutual influence during standard operating conditions of a piston ring. The outputs of the simulation were designed in accordance with industrial interest, like the volumetric gas flow through the piston assembly, the friction power losses and the lubricant oil consumption from the sources, which are affected by the piston ring pack. Besides the development of the simulation model, experiments were conducted with the intention of input data obtainment and results validation on an inline three-cylinder engine. Sample results were shown by applying the model to the parameters of the experimental engine. Possible industrial application of the source code is demonstrated with parameter studies. The work carried out within the frame of this doctoral dissertation was intended to fill the gap in the research area of combined simulation tools, able to support the needs of piston ring manufacturers and engine research centers, to calculate the impact of design parameter changes on friction losses and lubricant oil consumption simultaneously.
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