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EXPERIMENTAL STUDY ON THE STRATIFIED COMBUSTION CHARACTERISTICS ACCORDING TO COMPRESSION RATIO AND INTAKE TEMPERATURE IN A DIG ENGINE  

Lee, C.H. (Department of Mechanical Engineering, Hanyang University)
Lee, K.H. (Department of Mechanical Engineering, Hanyang University)
Publication Information
International Journal of Automotive Technology / v.7, no.6, 2006 , pp. 675-680 More about this Journal
Abstract
In the direct injected gasoline engine, atomized spray is desired to achieve efficient mixture formation needed to good engine performance because the injection process leaves little time for the evaporation of fuels. Therefore, substantial understanding of global spray structure and quantitative characteristics of spray are decisive technology to optimize combustion system of a GDI engine. The combustion and emission characteristics of gasoline-fueled stratified-charge compression ignition(SCCI) engine according to intake temperature and compression ratio was examined. The fuel was injected directly to the cylinder under the high temperature condition resulting from heating the intake port. With this injection strategy, the SCCI combustion region was expanded dramatically without any increase in NOx emissions, which were seen in the case of compression stroke injection. Injection timing during the intake temperature was found to be an important parameter that affects the SCCI region width. The mixture stratification and the fuel reformation can be utilized to reduce the required intake temperature for suitable SCCI combustion under each set of engine speed and compression ratio conditions.
Keywords
Stratified-charge combustion ignition(SCCI); GDI; Mixture distribution; Stratified combustion; ROHR(rate of heat release);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 2  (Related Records In Web of Science)
Times Cited By SCOPUS : 2
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