Development of Swirl Generator in Intake Manifold to Increase Engine Performance Port Injection Gasoline Engine
Keywords:port injection gasoline engine, engine performance, swirl flow.
The developments for future vehicles are how to reduce fuel consumption, pollutant emission while maintaining high level of engine performance. To deal with those issues, fuel system has been taken great concerns by scientists for a long period of time. As we know, Port Fuel Injection system (PFI) and Gasoline Direct Injection system (GDI) are popular techniques which are being used on commercial vehicles. This paper presents the possible improvement of engine performance by applying swirl generator at port injection gasoline engine. Adding swirl generators to the intake manifold aims to make the airflow more turbulent. The turbulent flow will increase the swirl flow in the combustion chamber. The mixture of fuel with air will also improve. Given these drawbacks, the study analyses the effect of adding a swirl generator to the intake manifold on engine performance, fuel consumption, and emissions produced.
The experiment is done on a port injection gasoline engine, four-stroke, SOHC four cylinder connected to the engine dynamometer, which is used to measure the power and emissions produced. To get a good form of swirl generator, experiments were performed using a flow bench. A method has also been developed simultaneously to quantify the swirl characteristics of a swirl generator under steady flow conditions in a flow laboratory using the cylinder head, intake manifold, and swirl generator from the engine experiments. A refined swirl meter is installed under the cylinder head to measure the compressive load of the swirl, allowing for the calculation of angular momentum of the incoming air at varying intake valve lifts, thus producing the swirl number. A correlation is then sought between the engine and flow experiments to help quantify the impact of swirl motion on combustion and cyclic variation. The airflow rate into the cylinder, discharge coefficient of the intake system, and flow loss coefficient across the blockage are also analyzed for different levels of swirl motion. The validity of this method under steady flow condition is confirmed by comparison of the results with the engine experiments.
Bayraktar, H. 2007. Theoretical investigation of flame propagation process in an SI engine running on gasoline-ethanol blends. Renewable Energy. 32(5): 758-771.
Bogin Jr, G., Chen, J.-Y. and Dibble, R.W. 2009. The effects of intake pressure, fuel concentration, and bias voltage on the detection of ions in a Homogeneous Charge Compression Ignition (HCCI) engine. Proceedings of the Combustion Institute. 32(2): 2877-2884.
Ceviz, M.A. 2007. Intake plenum volume and its influence on the engine performance, cyclic variability and emissions. Energy Conversion and Management. 48(3): 961-966.
Ceviz, M.A. and AkIn, M. Design of a new SI engine intake manifold with variable length plenum. Energy Conversion and Management. 51(11): 2239-2244.
El-Asrag, H., Lu, T., Law, C.K. and Menon, S. 2007. Simulation of soot formation in turbulent premixed flames. Combustion and Flame. 150(1-2): 108-126.
Erdil, A., Kodal, A. and Aydin, K. 2002. Decomposition of Turbulent Velocity Fields in an SI Engine. Flow, Turbulence and Combustion. 68(2): 91-110.
Guibert, P., Keromnes, A. and Legros, G. An Experimental Investigation of the Turbulence Effect on the Combustion Propagation in a Rapid Compression Machine. Flow, Turbulence and Combustion. 84(1): 79-95.
Han, J.O. and Kim, S.S. 1992. Effects of swirl on high-speed combustion in a single-shot optical SI engine. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 206(4): 237-247.
Haywood, J. B. 1988. Internal combustion engine fundamental. McGraw-Hill.
Hill, P.G. and Zhang, D. 1994. The effects of swirl and tumble on combustion in spark-ignition engines. Progress in Energy and Combustion Science. 20(5): 373-429.
Joo, S., Chun, K. and Shin, Y. 2000. Swirl effect on the flame propagation at idle in a spark ignition engine. Journal of Mechanical Science and Technology. 14(12): 1412-1420.
Lee, K., Bae, C. and Kang, K. 2007. The effects of tumble and swirl flows on flame propagation in a four-valve S.I. engine. Applied Thermal Engineering. 27(11-12): 2122-2130.
Li, Y., Liu, S., Shi, S. and Xu, Z. 1998. The effect of in-cylinder tumble motion on combustion in a four-valve SI engine. Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics. 19(1).
Lucas GG, Brunt MFJ. 1982. The effect of combustion chamber shape on the rate of combustion in a spark ignition engine. SAE Paper no. 820165:714â€“29.
Poulos SG, Heywood JB.1983. The effect of chamber geometry on spark-ignition engine combustion. SAEPaper no. 830334:1106â€“29
Yamaguchi, K., Yamamoto, H., Shiraishi, T. and Ohsuga, M. 1996. Influence of mixture preparation on HC emission of SI engine with high swirl ratio under cold conditions. JSAE Review. 17(2): 107-112
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