Investigation of ignition advance effects for CNG usage in a sequential dual ignition gasoline engine by using in-cylinder combustion cfd analysis
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Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Gazi Univ, Fac Engineering Architecture
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study; for a sequential dual ignition gasoline engine, the effects of ignition advance on engine characteristics and in-cylinder flame propagation have been numerically investigated for CNG usage with an in-cylinder combustion model. A CFD model for a single cylinder of the four-cylinder Honda L13A4 i-DSI engine with a sequential dual spark ignition is constructed in STAR-CD software for CNG usage by considering all components related to the combustion chamber (intake-exhaust manifold connections, intake-exhaust valves, cylinder, cylinder head, piston, spark-plugs, etc.). By using the CFD analyses for CNG usage, the optimum ignition advance is determined for the prescribed engine operating conditions of 3000-rpm engine speed, 10.8:1 compression ratio, and 1.2 air-fuel ratio. Analyzes are performed by varying the ignition advance in a wide range (60 degrees-10 degrees CAD and 55 degrees-5 degrees CAD ignition advance for the lst-2nd spark plugs, respectively). For engine operating conditions examined, it has been determined that the 30 degrees-25 degrees CAD advance value for the 1st-2nd spark plug from the top dead point is the optimum ignition advance in terms of engine performance and emission balance. For CNG, ignition advances have increased compared to gasoline. The in-cylinder flame propagation is visualized and evaluated for all investigated conditions.
Açıklama
Anahtar Kelimeler
Sequential dual ignition engine, CNG, Ignition advance, Engine characteristics, In-cylinder combustion CFD analysis
Kaynak
Journal of The Faculty of Engineering and Architecture of Gazi University
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
34
Sayı
2
