Thermodynamic analysis of combustion events in the natural gas fuelled SI engine with VVT

• Autorzy: Szwaja M. , Mazuro P. , Szwaja S.

Identyfikatory

DOI

10.5604/01.3001.0012.4819

• Języki publikacji: EN

Abstrakty

EN

The main aim of the research was to investigate influence of overlap of the natural gas fuelled spark ignited engine on the following parameters: Indicated Mean Effective Pressure (IMEP), heat rate release including combustion phases (ignition lag, main combustion phase). The content of the study includes results from processing in-cylinder pressure measurements, heat release rate analysis, combustion phases, and finally the conclusions. The tests were carried out on the test bed including the single cylinder research engine with a displacement volume of 550 cm3. The engine was equipped with independent cam phasors for both intake and exhaust valves, but for this investigation, the exhaust valve timing was fixed (the exhaust cam centre line was fixed at -95 crank angle (CA) deg before Top Dead Centre) and intake valve timing was changed (the intake cam centre line was varied from 90 to 150 CA deg after Top Dead Centre). The overlap was changed in the range from 85 to 25 CA deg. 8 tests series were performed, each singular series consisted of 300 consecutive engine combustion cycles. As observed, by varying the valve overlap it contributes to significant change in the peak combustion pressure, peak of heat release rate, and combustion phases. Summing up, variable valve timing affects compression and expansion strokes by changing polytropic indexes due to various amounts of exhaust residuals trapped in the cylinder. It affects not only engine volumetric efficiency but also the heat release rate and IMEP, so it does engine performance. Thus, variable valve timing can be considered as valuable tool that can be applied to the natural gas fuelled internal combustion engine.

Słowa kluczowe

EN

internal combustion engine; variable valve timing; heat release rate; IMEP; combustion phases

• 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: 2018
• Tom: Vol. 25, No. 4
• Strony: 421--427
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Szwaja M.

• Warsaw University of Technology Faculty of Power and Aeronautical Engineering Nowowiejska Street 21/25, 00-665 Warsaw, Poland

autor

Mazuro P.

• Warsaw University of Technology Faculty of Power and Aeronautical Engineering Nowowiejska Street 21/25, 00-665 Warsaw, Poland

autor

Szwaja S.

• Czestochowa University of Technology Mechanical Engineering and Computer Science Faculty Armii Krajowej Av. 21, 42-201 Czestochowa, Poland

Bibliografia

• [1] Szymkowiak, M., Szwaja, S., New concept of a rocker engine – kinematic analysis, Journal of KONES Powertrain and Transport, Vol. 19, No. 3, pp. 443-450, 2012.
• [2] Racewicz, S., Olejnik, A., Control of Fiat multiair valve-lift system using Atmega microcontroller, Journal of KONES Powertrain and Transport, Vol. 24, No. 3, pp. 119-236, 2017.
• [3] Sendyka, B., Sochan, A., Noga, M., Rodak, L., The description of the total efficiency of 2SZFE engine with the variable valve timing, Journal of KONES Powertrain and Transport, Vol. 14, No. 2, pp. 401-407, 2007.
• [4] Grab-Rogalinski, K., Szwaja, S., The combustion properties analysis of various liquid fuels based on crude oil and renewables, IOP Conference Series: Materials Science and Engineering, IOP Conf. Ser.: Mater. Sci. Eng., 148, 012066, 2016.
• [5] Szwaja, S., Ansari, E., Rao, S., Szwaja, M., Grab-Rogalinski, K., Naber, J. D., Pyrc, M., Influence of exhaust residuals on combustion phases, exhaust toxic emission and fuel consumption from a natural gas fueled spark-ignition engine, Energy Conversion and Management, Vol. 165, pp. 440-446, 2018.
• [6] Szwaja, S., Naber, J. D., Exhaust gas recirculation strategy in the hydrogen SI engine, Journal of KONES Powertrain and Transport, Vol. 14, No. 2, pp. 457-464, 2007.
• [7] Szwaja, S., Naber, J. D., Impact of leaning hydrogen-air mixtures on engine combustion knock, Journal of KONES Powertrain and Transport, Vol. 15, No. 2, pp. 483-492, 2008.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).