Effect of the fuel injection pressure on the combustion process in a PFI boosted spark-ignition engine

• Autorzy: Merola S. S. , Sementa P. , Tornatore C. , Vaglieco B. M.
• Języki publikacji: PL

Abstrakty

EN

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.

Słowa kluczowe

EN

PFI SI engine; boosting; fuel injection; fuel deposition; optical diagnostics

• 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: 2008
• Tom: Vol. 15, No. 4
• Strony: 341--349
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Merola S. S.

autor

Sementa P.

autor

Tornatore C.

autor

Vaglieco B. M.

• Istituto Motori - CNR Via G. Marconi, 8 - 80125Napoli Italy,

Bibliografia

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