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Kim, S.; Yan, Y.; Nouri, J. M.; Arcoumanis, C. (2013)
Languages: English
Types: Article
Subjects: TA
The spatial fuel distributions of the homogeneous and stratified charge of a high pressure 6-hole injector were examined in a single cylinder optical direct injection spark ignition (DISI) engine. The effects of in-cylinder charge motion, fuel injection pressure and coolant temperature were investigated using a planar laser induced fluorescence (PLIF) technique. It was found that in the case of homogeneous charge mode, early injection in the intake stroke generated similar fuel distributions at the crank angle of 12° BTDC regardless of the in-cylinder air motion at the coolant temperature of 90 °C. In the case of stratified charge mode, the in-cylinder tumble flow played more effective role in mixture preparation than the swirl flow during the compression stroke; and the increase of the coolant temperature improved fuel evaporation; but the increase of the fuel supplying pressure could not change the pattern of the fuel vapour distribution against the expectation.
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    • [1] Zhao F., Lai M. and Harrington D.L., “A review of mixture preparation and combustion control strategies for SIDI Gasoline Engines”, SAE 970627, 1997.
    • [2] Wirth, M., Piock, W. F., Fraidl, G. K. K., Schoeggi, P., and Winklhofer, E., “Gasoline DI engines: the
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