Development of a Mathematical Model that Calculates Combustion, Emission and Engine Performance Values of Internal Combustion Engines

Öz

In this study, a simulation program was developed that can calculate combustion, emission and engine performance values depended on variable parameters for internal combustion engines by mathematical modelling. This simulation program was created with the Java programming language. Graphical user interface (GUI) was used in this simulation program. With the simulation program created, it can calculate many values such as in-cylinder pressure, temperature, gas amounts generated as a result of combustion, power, torque, specific fuel consumption, both in spark ignition engines and compression ignition engines. This simulation program presents the results both numerically and graphically. The calculations are obtained at every crankshaft angle at 0.25 ˚ intervals. With this simulation program, analyses were made in different excess air coefficients (0.9-1-1.1-1.2) and the effects of in-cylinder pressure, temperature, mass ratios of gas components and engine performance values were compared. According to the simulation results, as the excess air coefficient increases, the temperature and pressure values decrease. 〖CO〗_2 and NO mass ratios decrease as the excess air coefficient increases in case the excess air coefficient is greater than 1. H_2 O mass ratio increased as the excess air coefficient increased.

Anahtar Kelimeler

• Internal combustion engines
• Engine performance
• Exhaust emission
• Graphical user interface (GUI)

Kaynakça

1. M. Ö. ÜLTANIR, 21. yüzyıla Girerken Türkiye'nin Enerji stratejisinin deǧerlendirilmesi. İstanbul: TÜSİAD, 1998.
2. D. STEPANENKO and Z. KNEBA, “Thermodynamic modeling of combustion process of the internal combustion engines – an overview,” Combustion Engines, vol. 178, no. 3, pp. 27–37, 2019.
3. S. Aϊta, A. Tabbal, G. Munck, K. Fujiwara, H. Hongoh, E. Tamura, and S. Obana, “Numerical simulation of port-valve-cylinder flow in reciprocating engines,” SAE Technical Paper Series, 1990.
4. M. Balcı, “Computer simulation of a Four-Stroke turbo charged direct injection diesel engine,” Doctoral thesis, Gazi University Institute of Science and Technology, Ankara, 1986.
5. S. Polat, “Computer aided simulation and performance analysis of a four stroke, single cylinder, variable compression ratio diesel engine,” Master’s thesis, Gazi University Institute of Science and Technology, Ankara, 2010.
6. E. Esin, “Combusting modeling and emissions predictions by using a graphical user Interface,” Master’s thesis, Atatürk University Graduate School of Applied Sciences, Erzurum, 2014.
7. G. P. Blair, Design and simulation of four-stroke engines. Warrendale, PA: Society of automotive engineers, 1999.
8. J. B. Heywood, Internal Combustion Engine Fundamentals. Singapore: Mc Graw Hill International Editions, 1988.

9. Safgönül Behçet, M. Ergeneman, Arslan H. Ertuğrul, and Soruşbay Cem, İÇTEN Yanmalı Motorlar. İstanbul: Birsen Yayınevi, 2013.
10. U. Kiencke and L. Nielsen, Automotive control systems: For engine, driveline, and vehicle. Berlin: Springer Berlin, 2010.
11. M. J. Moran, Introduction to thermal systems engineering: Thermodynamics, Fluid Mechanics, and heat transfer. New York: John Wiley & Sons, 2003.
12. A. I. Kolchin, V. P. Demidov, and P. Zabolotnyi, Design of automotive engines. Moscow: Mir, 1984.
13. Çengel Yunus Ali, M. A. Boles, and Pınarbaşı Ali, Mühendislik Yaklaşımıyla termodinamik. Konak, İzmir: İzmir Güven Kitabevi, 2012.
14. C. Borgnakke and R. E. Sonntag, Borgnakke's fundamentals of Thermodynamics. Singapore: Wiley, 2017.
15. G. Borman and K. Nishiwaki, “Internal-combustion engine heat transfer,” Progress in Energy and Combustion Science, vol. 13, no. 1, pp. 1–46, 1987.
16. K. Sihling and G. Woschni, “Experimental investigation of the instantaneous heat transfer in the cylinder of a high speed diesel engine,” SAE Technical Paper Series, 1979.
17. C. Olikara and G. L. Borman, “A computer program for calculating properties of equilibrium combustion products with some applications to I.C. engines,” SAE Technical Paper Series, 1975.
18. C. R. Ferguson and A. T. Kirkpatrick, Internal Combustion Engines: Applied thermosciences. Chichester: Wiley, 2015.
19. M. D. Artamonov, Morin Mikhail Mikhaĭlovich, and V. A. Ilarionov, Motor vehicles: Fundamentals and design. Moscow: Mir, 1976.
20. Ülger Poyraz, Termik Motorlar. İstanbul: Hiperlink, 2011.
21. J. Jaworski, Java 1.1 Developer's Guide. Sams Publishing, 1997.