Recognition of fuel feeding SI engines with use of dimensional and nondimensional vibration parameters

• Autorzy: Flekiewicz M. , Fabiś P. , Flekiewicz B.
• Języki publikacji: EN

Abstrakty

EN

The availability of gaseous fuels like natural gas and propane butane mixtures has lead to worldwide popularity of internal combustion engines running dual fuel or alternatively gas powered. They are known as fuels more resistant to knocking than conventional liquid fuels and as ones less pollutant, their better mixing with air is also well recognized. There have been many published works on the use of gaseous fuels but actually the problem of the combustion noise, as a very important source of acoustic discomfort is not receiving attention. Combustion noise occurs in two forms, direct and indirect. It is transmitted throughout the engine block as a vibration at a different spectrum of frequencies. In this study an attempt is made to correlate the combustion noise to the operating parameters for LPG and CNG powered engine as compared to petrol fuelled engine. Combustion pressure and vibration of cylinder block data are measured and presented for engine running on LPG/CNG and compared to the results obtained for engine fed by petrol. Signals of multiple resonances in combustion chamber and corresponding vibration signals of cylinder block of engine were considered for one combustion cycle. A four cylinder, 1.6 dm3 spark-ignition engine converted to run on LPG and CNG was tested in the project. The engine test stand was fully computerized and the cylinder pressure data, acceleration of vibration of engine block, crank angle data was stored on a PC. The influence of engine speed, load on combustion and engine block vibration was examined for all fuels. A few of well know diagnostic parameters were used for comparison of the engine noise for operation on petrol, LPG and CNG.

Słowa kluczowe

EN

vibration; combustion noise; gaseous fuel; LPG; 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: 2007
• Tom: Vol. 14, No. 3
• Strony: 153--162
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Flekiewicz M.

autor

Fabiś P.

autor

Flekiewicz B.

• Silesian University of Technology Krasińskiego 8, 40-019 Katowice, Poland tel. [phone], fax [phone],

Bibliografia

• [1] Gao, Y., Randall, R. B., Reconstruction of Diesel Cylinder Pressure Using a Time Domain Smoothing Technique, Mechanical System and Signal Processing, Vol. 13(5), 1999.
• [2] Flekiewicz, M., Madej, H., Estimation of IC engine combustion process using vibroacoustic techniques, Silesian University of Technology Papers.vol.48, 2003.
• [3] Flekiewicz, M., Madej, H., Introduction to identification of IC engine noise. Scie, Conf. Of Modal Analysis, Cracovia, 2004.
• [4] Flekiewicz, M., Kubica, G., Wilk, K., An attempt of prediction of exhaust gases composition by petrol and LPG powered SI engine, Papers of the VIIth Inter. Scie. Conf. GAS ENGINE 2006, pp. 249-260, 2006.
• [5] Leonhardt, S., Müller, N., Isermann, R., Methods for engine supervision and control based on cylinder pressure information, IEEE/ASME Transactions on Mechatronics, Vol.4 No. 3,1999.
• [6] Ozawa, H., Nakada, T., Pseudo cylinder pressure excitation for analyzing the noise characteristics of the engine structure, JSAE Review 20, pp. 67-72, 1999.
• [7] PCB Piezotronics Vibration Division – Product Catalog, USA, New York, 2003.
• [8] Mc Carthy, D. J., Lyon, R. H., Recovery of impact signatures in machine structures, Mechanical Systems and Signal Processing, 9, pp. 465-483, 1995.
• [9] Thite, A. N., Thompson, D. J., The quantification of structure-borne transmission paths by inverse methods, Part 1: Improved singular value rejection methods. Journal of Sound and Vibration 264, pp. 411-431, 2003.
• [10] Flekiewicz, M., Flekiewicz, B., Fabiś, P., Engine block vibration level as a tool for fuel recognition, SAE Paper 2007-01-2162, 2007.