Simulation of injection and combustion processes in 4-stroke spark ignition engine with CNG direct injection

• Autorzy: Sendyka B. , Mitianiec W. , Noga M. , Wachulec W.
• Języki publikacji: EN

Abstrakty

EN

The paper presents results of simulation conducted as afirst step of 4-stroke spark ignition experimental engine testing. The simulations were performed in a KIVA-3Vsoftware, which is intended to carry out a 3-D simulations of engine's processes. The source code of the software has been modified in order to apply it for gas injection. Original version of the software has been designedto simulate liquid fuel injection only. The simulation of direct CNG injection and combustion has been done for stratified and homogenous modes in order to check the assumed injection, ignition and charging parameters. Important assumption is that the injector had only one nozzle with flow area equal to 2 mm2. Two different cases of fuel direct injection for stratified charge have been analysed. In the first case fuel jet was almost vertical. In the other one fuel jet was nearly horizontal. Further testing has been performed using one-cylinder motorcycle 4-stroke SUZUKI DR-Z400S engine adapted to CNG fuelling. Such an engine has a suitable high compression ratio for CNG fuelling. The simulation has confirmed assumed parameters and has shown that one nozzle injector doesn't provide required fuel stream dissipation and piston crown modification is needed to direct fuel stream in spark plug area. However doing simulation requires some effort this example has shown than this is very important step before conducting experimental tests which provides crucial information and helps to avoid expensive mistakes which can be made during experimental engine preparation.

Słowa kluczowe

EN

injection process; combustion process; simulation; modelling; alternative fuels; CNG

• 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: 2010
• Tom: Vol. 17, No. 1
• Strony: 373--378
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Sendyka B.

autor

Mitianiec W.

autor

Noga M.

autor

Wachulec W.

• Cracow University of Technology Institute of Automobiles and Internal Combustion Engines Jana Pawła II Av. 37, 31-864 Kraków, Poland tel.:[phone], fax:[phone],

Bibliografia

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• [3] Eriksson, L., Spark Advance Modeling and Control, Studies and Technology Dissertations, No. 580. Linköping University, Linköping 1999.
• [4] Heywood, J., Internal Combustion Engine Fundamentals, Mc-Graw Hill, New York 1988.
• [5] Yasar, O., et al., A New Spark Ignition Method for KIVA Engine Modeling, Oak Ridge National Laboratory, Oak Ridge 1998.
• [6] Hires, S. D., Tabaczyński, R. J., The Prediction of Ignition Delay and Combustion Intervals for Homogeneous Charge, Spark Ignition Engine. SAE Pap. 780232, SAE, 1978.
• [7] Szargut, J., Termodynamika techniczna, PWN, Warszawa 1991.
• [8] Vandebroek, L., Winter, H., Berghmans, J., Numerical Study of the Auto-ignition Process in Gas Mixtures using Chemical Kinetics, K.U.Leuven, Dept. Of Mechanical Engineering, 2000.
• [9] Look, D. C., Sauer, H. J., Engineering Thermodynamics, PWS Engineering, Boston 1986.
• [10] Spadaccini, L. J., Tevelde, J. A., Autoignition Characteristic of Aircraft Fuels, NASA Contractor Report Cr-159886, 1980.