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In this paper, low-cost solutions were proposed to reduce the fuel consumption in a boosted port fuel injection spark ignition (PFI SI) engine, taking into account the engine performances and the pollutants emission. To this purpose, the optical characterization of the fuel injection and of the combustion process was carried out in a PFI SI engine. The experiments were performed on a partially transparent single-cylinder SI engine, equipped with a four-valve head and an external boost device. The intake manifold was optically accessible through three holes that allowed the introduction of an endoscope and of optical fibres. The standard injection condition planned by the engine manufacturer was investigated; it consisted in the fuel injection at 3.5 bar when the intake valves were closed. Moreover, the fuel injection with open intake valves was tested; 3.5 and 6.5 bar fuel pressures were studied for open and closed valves conditions. Optical techniques based on 2D-digital imaging were used to follow the fuel injection spray in the intake manifold and the flame propagation in the combustion chamber. The results of in-cylinder optical investigations were correlated with the engine performances and with the exhaust emissions.
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Rocznik
Tom
Strony
341--349
Opis fizyczny
Bibliogr. 12 poz., rys.
Twórcy
autor
autor
autor
autor
- Istituto Motori - CNR Via G. Marconi, 8 - 80125Napoli Italy, s.merola@im.cnr.it
Bibliografia
- [1] Heywood, J. B., Internal Combustion Engine Fundamentals., New York: McGraw-Hill 1988.
- [2] Zhu, G. G., Daniels, C. H., Winkelman J. - MBT timing detection and its closed-loop control using in-cylinder pressure signal – SAE, paper n. 2003-01-3266, 2003.
- [3] Heywood, J. B., Kasseris, E., Comparative Analysis of Automotive Powertrain Choices for the Next 25 Years, SAE paper n. 2007-01-1605, 2007.
- [4] Tatschl, R., Bogensperger, M., Kotnik, G., Priesching, P., Gouda, M., Flame Propagation and Knock Onset Analysis for Full Load SI_Engine Combustion Optimisation using AVL FIRE, IMEM Users Group, SAE Congress, MI 2005.
- [5] Merola, S. S., Vaglieco, B. M., Formisano, G., Lucignano, G., Mastrangelo, G., Flame Diagnostics in the Combustion Chamber of Boosted PFI SI Engine, SAE Paper No. 2007-24-0003, 2007.
- [6] Merola, S. S., Sementa, P., Tornatore, C., Vaglieco, B.M., Effect of fuel film deposition on Combustion Process in PFI SI engine, Journal of Kones, Powertrain and Transport, Vol. 14, No. 3, 395-402, 2007.
- [7] Costanzo, V. S., Heywood, J. B., Mixture Preparation Mechanisms in a Port Fuel Injected Engine, SAE paper n. 2005-01-2080, 2005.
- [8] Gold, M. R., Arcoumanis, C., Whitelaw, J. H., Gaade, J.; Wallace, S., Mixture Preparation Strategies in an Optical Four-Valve Port-Injected Gasoline Engine, Int. J. of Engine Research, Vol. 1, No. 1, 41-56, 2000.
- [9] Shin, Y., Cheng, W. K., Heywood, J. B., Liquid Gasoline Behaviour in the Engine Cylinder of a SI Engine, SAE Paper n. 941872, 1994.
- [10] Zhu, G. S., Reitz, R. D., Xin, J., Takabayashi, T., Modelling Characteristics of Gasoline Wall Films in the Intake Port of Port Fuel Injection Engines, Int. J. of Engine Research, Vol. 2, No. 4, 231-248, 2001.
- [11] Bianco, Y., Cheng, W., Heywood, J. B., The Effects of Initial Flame Kernel conditions on Flame Development in SI Engines, SAE paper n. 912402, 1991.
- [12] Witze, P., Hall, M., Bennet, M., Cycle-resolved Measurements of Flame Kernel Growth and Motion Correlated with Combustion Duration, SAE paper n. 900023, 1990.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ8-0004-0021