Gasoline Mixture Combustion in Direct Fuel Injection SI Two-Stroke Engine

• Autorzy: Mitianiec W. , Rodak Ł. , Forma M.
• Języki publikacji: EN

Abstrakty

EN

Process of gasoline mixture combustion in two-stroke engines is much more complicated than in four stroke engines. In order to decrease fuel consumption and exhaust gas emission, particularly hydrocarbons, two-stroke engines should have direct fuel injection systems. The paper presents results of both simulation and experimental tests on a small power gasoline two-stroke engine. The special high pressure injection system was elaborated in Cracow University of Technology for engine with capacity 115 cm3. The most important factor in such engine is small time for fuel evaporation and obtaining a homogeneous mixture in the combustion chamber. The gas flow in the cylinder (tumble and swirl) causes a certain deviation of fuel stream during injection and therefore location of the injector has big significance on the combustion process. The paper shows results of fuel distribution in the cylinder for different crank angles obtained from spatial simulation (KIVA3V) and propagation of the flame during combustion process. Experimental work was carried out on the engine in order to determine influence of injection parameters on engine work and combustion process. On the basis of pressure traces at different loads and rotational speeds heat release rates were calculated and Vibe functions were found. The paper presents the engine experimental stand and results of decreasing of important exhaust gases components at the same engine working parameters as in carburetted engine.

Słowa kluczowe

EN

gasoline mixture; two-stroke engine; combustion process

• Wydawca: Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archivum Combustionis
• Rocznik: 2010
• Tom: Vol. 30 nr 4
• Strony: 377--397
• Opis fizyczny: Bibliogr. 22 poz., rys.

Twórcy

autor

Mitianiec W.

autor

Rodak Ł.

autor

Forma M.

• Cracow University of Technology, Al. Jana Pawla II 37, 31-864 Krakow, Poland tel: [phone]; Fax: [phone],

Bibliografia

• [1] Agawral A., Assanis D., Multi-Dimensional Modeling of Natural Gas Ignition Under Compression Ignition Conditions Using Detailed Chemistry, SAE Paper 980136
• [2] Amsden A.A. et al: KIVA: A Computer Program for Two- and Three-Dimensional Fluid Flows with Chemical Reactions and Fuel Sprays. Rept. LA-10245-MS, 1985.
• [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] Blair G. P., Design and Simulation of Four-Stroke Engines, SAE R-161, Warrendale, 1980
• [5] Chen Y.S., Kim S.W.: Computation of Turbulent Flows Using an Extended k-e turbulence closure model. NASA CR-179204, 1987.
• [6] Elshnawi 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.
• [7] Faeth G. M., Evaporation and Combustion of Sprays. Prog. Energy Comb. Sci., Vol. 9. pp 1-76, 1983.
• [8] Ghandi J.B.et al.: Investigation of the Fuel Distribution in a Two-Stroke Engine with an Air-Assisted Injector. SAE Paper 940394. SAE Int. Congress & Exp., Detroit, 1994.
• [9] Heywood J. B., Internal Combustion Engine Fundamentals, Mc Graw-Hill, 1988
• [10] Heywood J. B., Combustion and its modeling in Spark Ignition Engines, International Symposium COMODIA 94, Paper C94-P001, 1994
• [11] Higelin P., Mounaim-Rouselle C., Pajot O., Robinet C., Moreau B., Flame Propagation in an SI Engine with a Non-Conventional Igniter, The Fourth International Symposium COMODIA 98, Paper C98-P341, 1998
• [12] Ikeda Y., Nakajima T., Kurihara N.: Spray Formation of Air-Assist Injection for Two-Stroke Engine. SAE Paper 950271. SAE Int. Congress & Exposition, Detroit, 1995
• [13] JANAF Thermochemical Tables, National Bureau of Standards Publication NSRDS-NBS37, 1971
• [14] Kuo T., Reitz R.: Three-dimensional computations of combustion in premixed-charge and direct-injected two-stroke engines. SAE paper 920425, 1992.
• [15] Melton L.A.: Exciplex-Based Vapor/Liquid Visualization Systems Appropriate for Automotive Gasolines. Report #1, Contract #27, Texas High Education Coordination Board. November 1990.
• [16] Mitianiec W.: Wtrysk paliwa w silnikach dwusuwowych małej mocy. Polska Akademia Nauk. Kraków, 1999.
• [17] Mitianiec W., Jaroszewski A.,Modele matematyczne procesów fizycznych w silnikach spalinowych małej mocy, Ossolineum, Wroclaw-Warszawa-Krakow, 1993
• [18] Nakano D., Suzuki T., Matsui M., Gas Engine Ignition System for Long-Life Spark Plugs, SAE Paper 2004-32-0086 / 20044373, SETC Graz, 2004.
• [19] Sendyka B., Noga M., Propagation of flame whirl at combustion of lean natural gas charge in a chamber of cylindrical shape, Combustion Engines, 2007-SC2, PTNSS , Bielsko Biała 2007
• [20] Spalding D.B., Combustion and Mass transfer, Pergamon Press, 1979
• [21] Rassweiler G.M., Withrow L., Motion Pictures of Engine Flames Correlated with Pressure Cards, SAE Paper 800131, Warrendale, 1980
• [22] Vibe I. I., Brennverlauf und Kreisproceß von Verbrennungs-motoren, VEB Technik, Berlin, 1970