Completeness of combustion and cyclic effectivenessin spark-ignition engines

• Autorzy: Battoei-Avarzaman M. , Sobiesiak A.
• Języki publikacji: EN

Abstrakty

EN

The focus of this study was to apply and evaluate two separate techniques for estimating of the completeness of combustion in a multi-cylinder engine fueled with compressed natural gas. The degree of correlation between these two independent estimates of the combustion completeness was sought. One technique, with better time resolution and viewed to be more accurate, calculates the completeness of combustion and cyclic effectiveness on a cycle-by-cycle basis using in-cylinder pressure measurements. The technique utilizes the normalized pressure rise parameter due to combustion to describe the completeness of combustion. The second technique evaluates the completeness of combustion based on time-averaged measurements of unburned hydrocarbons in engine exhaust gases. Both the in-cylinder pressure and exhaust gas composition data were obtained from a test multi-cylinder engine fueled first with gasoline and then with compressed natural gas (CNG). The successful aspect of this investigation was to propose a new parameter, the cyclic effectiveness, that it is strongly related to completeness of combustion. The advantage of the new parameter is that its calculation does not require computations of the pressure rise due to combustion. It also avoids difficulties associated with that procedure in finding other parameters such as the polytropic exponents at the start and end of combustion.

• 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: 2004
• Tom: Vol. 11, No. 1-2
• Strony: 35--43
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Battoei-Avarzaman M.

• Department ofMechanical, Automotive and Materiał Engineering University ofWindsor, Windsor, ON, Canada N9B 3P4 Phone: [phone]x.38

autor

Sobiesiak A.

• Department ofMechanical, Automotive and Materiał Engineering University ofWindsor, Windsor, ON, Canada N9B 3P4 Phone: [phone]x.38

Bibliografia

• [1] Stone. C. R. "Introduction to internal combustion engines." Third edition, SAE 2000
• [2] Rassweiler, G. M. and Withrow, L., "Motion pictures of engine flame correlated with pressure cards", SAE Paper 800131 (originally presented in 1938).
• [3] Reuss, D. L., Kuo. T . -W. Khaligi, B., Haworth, D., and Rosalik, M., "Particle image velocimetry measurements in a high swirl engine used for evaluation of computational fluid dynamics calculations.", SAE 952381,1995.
• [4] Ball. J. K .. Raine. R. R. and Stone C. R., "Combustion analysis and cycle-to-cycle variations in spark ignition engine combustion. Part I: an evaluation of combustion analysis routines by reference to model data."', Proc. lnstn. Mech. Engrs., Vol. 212, pp. 381-399, 1998.
• [5] Ball J. K., Raine R. R. and Stone C. R., "Combustion analysis and cycle-to-cycle variations in spark ignition engine combustion. Parts 2: a new parameter for completeness of combustion and its use in modeling cycle-to-cycle variations in combustion.", Proc. Instn. Mech. Engrs., Vol. 212, pp. 381-399, 1998.
• [6] Ball J. K., Raine R. R. and Stone C. R., "Combustion analysis and cycle-to-cycle variations in spark ignition engine combustion. Parts 2: a new parameter for completeness of combustion and its use in modeling cycle-to-cycle variations in combustion.", Proc. Instn. Mech. Engrs., Vol. 212, pp. 381-399, 1998.
• [7] AI-Fakhri, Y. and Raine, R. R., „Application of a new technique for the evaluation of the cycle-by-cycle variation of completeness of combustion to changes of compression ratio.", SAE 2000-01-1213, 2000.