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Effects of Injection Timing and Intake Flow on In-Cylinder Fuel Behavior in a GDI Engine  

이정훈 (부산대학교 대학원 기계공학과)
강정중 (부산대학교 대학원 기계공학과)
김덕줄 (부산대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.11, no.6, 2003 , pp. 7-13 More about this Journal
Abstract
The purpose of this study is to investigate the effect of the in-cylinder flows and different injection timings on fuel behavior in the cylinder of a GDI engine. Three different flows types induced by using masked port, unmasked port, and port deactivation were tumble, swirl&tumble, and high swirl respectively. LIEF technique was applied to investigate the mixture formation and fuel distribution at ignition time in the transparent engine with optical access through the piston top and upper part of cylinder liner. Injection timings of 180,90, and 60 degrees before TDC were examined. It was found that tumble flow was more effective on the homogeneous mixture formation than other flow and swirl flow transported more fuel vapor to the exhaust side at early injection mode, and swirl and swirl & tumble flow made fuel vapor concentrate around the cylinder center at late injection mode.
Keywords
GDI engine; Swirl; Tumble; LIEF; Injection timing; Homogeneous mixture;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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