Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

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

직접분사식 가솔린 엔진에서 분사시기와 흡입유동이 실린더 내 연료의 거동에 미치는 영향

  • 이정훈 (부산대학교 대학원 기계공학과) ;
  • 강정중 (부산대학교 대학원 기계공학과) ;
  • 김덕줄 (부산대학교 기계공학부)
  • Published : 2003.11.01
Download PDF
⟨ Previous Next ⟩

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

References

  1. SAE 970541 Development of Gasoline Direct Injectoion Engine Y.Iwamoto;K.Noma;O.Nakayama;T.Yamauchi;H.Ando
  2. Progress in Energy and Combustion Science v.25 no.5 Automotive Spark-ignited Direct-Injection Gasoline Engine F.Zhao;M.C.Lai;D.L.Harrington
  3. SAE 1999-01-0502 The Effect of In-cylinder Wall Wetting Location on the HC Emissions from SI Engines R.Stanglmaier;J.Li;R.Matthews
  4. SAE 1999-01-1530 Particulate Emissions from a Direct-Injection Spark Ignition(DISI) Engine M.Maricq;D.Podsiadlik;D.Brehob;M.Haghhooie
  5. Transactions of KSAE v.9 no.5 Concentration Distribution of Liquid/Vapor Phases under In-Cylinder Flow Field with Different Injection Timings H.J.Kim;D.S.Choi;D.J.Kim
  6. Transactions of KSAE v.10 no.2 The Effects of Tumble and Swirl Flow on the Behavior of Liquid/Vapor Phases in a DI Gasoline Engine J.J.Kang;D.S.Choi;D.J.Kim
  7. Journal of KSAE v.26 no.4 The Effect of Piston Bowl Shape on Behavior of Vapor Phase in a GDI Engine P.S.Hwang;J.J.Kang;D.J.Kim
  8. SAE 990152 Evaluation of a concept for DI Gasoline Combustion Using Enhanced Gas Motion Y.Moriyoshi;H.Nomura;Y.Saisyu
  9. SAE 2000-01-1900 Effects of Swirl and Tumble on Mixture Preparation During Cold Start of a Gasoline Direct-Injection Engine S.Lee;K.Tong;B.D.Quay;J.V.Zello;D.A.Santavicca
  10. SAE 2000-01-0533 Effects of Swirl and Tumble on In-Cylinder Fuel Distribution in a Central Injected DISI Engine T.Alger;M.Hall;D.Matthews
  11. SAE 1999-01-0177 Effect of Air Motion on Fuel Spray Characteristics in a Gasoline Direct Injection Engine Y.J.Kim;S.H.Lee;N.H.Cho