Mathematical model phases of fuel injection in the spark -ignition engine with direct fuel injection during work on the heterogeneous mixture

• Autorzy: Sendyka B. , Cygnar M. , Janisz K.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the methods and results of calculation of time necessary for transmission of a jet of stratified charge from the injector to the gap between the electrodes of the ignition plug, which is the basis for determination of the advance angle of fuel injection in relation to the advance angle of ignition. This time is the sum of duration of four phases of load jet way and is calculated basing upon a number of empiric formulae taken from recent publications. Constructors of gasoline engines are faced with higher and higher requirements as regards ecological problems and increase in engine efficiency at a simultaneous decrease in fuel consumption. Satisfaction of these requirements is possible due to recognition of the phenomena occurring inside the engine cylinder, choice of suitable optimal parameters of the fuel injection process, and determination of geometrical shapes of the combustion chamber and piston head. Increase of engine efficiency is connected, first of all, with the changes in fuel supply, it means a proper regulation of fuel - air mixture in dependence on the rotational speed and load; hence, combustion of stratified mixtures in a gasoline engines with direct fuel injection is essential for increase in efficiency with a simultaneous decrease in emission of toxic components of exhaust gases and fuel consumption. Such a kind of supply systems show that, apart from combustion of very lean mixtures a gasoline engine with direct fuel injection possesses many other advantages, i.e.: fuel consumption comparable with other engines with self - induced ignition, greater power than in other spark ignition engines with multi - point fuel injection. The results of the performed analysis were given in two-dimensional diagrams.

Słowa kluczowe

EN

transport; internal combustion engine; fuel injection system

• 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. 3
• Strony: 465--470
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Sendyka B.

autor

Cygnar M.

autor

Janisz K.

• Kraków University of Technology Institute of Automobiles and Internal Combustion Engine Warszawska Street 24, 31-155 Kraków, Poland,

Bibliografia

• [1] Evers, L. W., Characterization of the Transiert Spray from a High Pressure Swirl Injector, SAE Papers, No. 940188, 2000.
• [2] Kano, M., Saito, K., Basaki, M., Matsushita, S., Gohno, Analysis of Mixture Formation of Direct-Injection Gasoline Engine, Gasoline Direct Injection Engine SAE International Congress, USA 2000
• [3] Lefebvre, A. H., Atomizations and Sprays, Hemisphere Publishing Corporation, 1989
• [4] Rizk, N. K., Lefebvre, A. H., Internal Flow Characteristics of Simplex Swirl Atomizers, AIAA, J. Propul. Power, 1, 193, 1985.
• [5] Xu, M., Markle, L. E., CFD-Aided Development of Spray for an Outwardly Opening Direct-Injection Gasoline Injector, Gasoline Direct Injection Engine SAE International Congress, USA 2000.