Theoretical and experimental study of the ignition process in CNG direct injection SI engines

• Autorzy: Mitianiec W. , Zioło T. , Noga M.
• Języki publikacji: EN

Abstrakty

EN

The future requirements of CO2 emission decreasing in ICE by applying of new fuels leads also to a design of new engines with direct injection of the compressed natural gas in internal combustion engines with high compression ratio. Because of higher temperature of CNG ignition the SI engines have more effective ignition system than conventional engines. The gas motion, turbulence, charge temperature, spark gap, electrical resistance of the gas and obviously electrical energy of the coil have a big influence on the ignition and burning process in the combustion chamber. The paper includes theoretical and experimental investigations of ignition process in the high charged SI engines with direct CNG injection and in the caloric chamber. The influence of the "tumble" and "swirl" on the sparking is shown by modelling of this process. The paper includes also the thermal efficiency of the ignition process with given values of radiation, conductive and ionization losses. The experimental and mostly simulation tests showed some important factors which influence on the ignition and combustion process of the compressed natural gas. The thermal efficiency of the ignition system increases linearly with the initial pressure in the chamber. The energy consumed by the charge is only a small part of the total energy delivered by the secondary circuit of the coil. The test of the influence of the gas motion on the ignition and combustion process of methane was carried out in CFD environment.

Słowa kluczowe

EN

transport; SI four-stroke engine; fuelling

• 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: 2007
• Tom: Vol. 14, No. 3
• Strony: 411--421
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Mitianiec W.

autor

Zioło T.

autor

Noga M.

• Cracow University of Technology Al. Jana Pawla II37, 31-864 Krakow, Poland tel: [phone], fax: [phone],

Bibliografia

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• [3] Amsden, A. A., O'rurke, P. J., Butler, T. D., Kiva-II – A Computer Program for Chemically Reactive Flows with Sprays, Los Alamos National Lab., LA-11560-MS, 1989.
• [4] Heywood, J. B., Internal Combustion Engine Fundamentals, Mc Graw-Hill, 1988.
• [5] Mitianiec, W., Jaroszewski, A..,Modele matematyczne procesów fizycznych w silnikach spalinowych małej mocy, Ossolineum, Wroclaw-Warszawa-Krakow, 1993.
• [6] Nakano, D., Suzuki, T., Matsui, M., Gas Engine Ignition System for Long-Life Spark Plugs, SAE Paper 2004-32-0086 / 20044373, SETC Graz, 2004.
• [7] Poloni, M., Tahir, A.,Daniz, M., Personal car engines powered by CNG, Journal of Kones, Vol. 10, No 1-2,Warsaw, 2003.
• [8] Elhsnawi, M., Teodorczyk, A., Validation of detailed reaction mechanisms for simulations of combustion systems with gas injection, Journal of Kones, Vol. 9, No 1-2, Warsaw-Gdansk, 2002.
• [9] PHOENICS Reference Manual TR200, CHAM, London, 1991.
• [10] Sendyka,B., Noga, M., Propagation of flame whirl at combustion of lean natural gas charge in a chamber of cylindrical shape, Silniki Spalinowe Combustion Engines, 2007-SC2, Polskie Towarzystwo Naukowe Silników Spalinowych, Bielsko Biała, 2007.