Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

Engine Operation Characteristics of a Gasoline Direct Injection Engine

가솔린 직접 분사식 엔진의 운전특성에 관한 연구

  • Published : 2000.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

A gasoline direct injection single cylinder engine has been developed to study operational characteristics for highly stratified conditions. Parameters related to design and experiment were also studied to understand the characteristics of combustion and emissions at some part load conditions. It was found that optimal timings between the end of fuel injection and spark ignition were existed for stable combustion under the stratified modes, In a low engine speed, fuel spray behavior around piston bowl was important for stable combustion. The in-cylinder air motion affecting fuel spray behavior was found to be a dominant factor at higher engine speed as fuel injection timing had to be advanced to secure enough time for fuel evaporation and mixing with surrounding air. As swirl ratio increased, spark timing could be advanced for stable combustion and a higher compression ratio could be used for improved fuel consumption and stable combustion at the stratified mode. It was also observed that electrode geometry and piston bowl shape played an important role for combustion and emission characteristics and some results were shown for comparison.

Keywords

References

  1. SAE Paper 970540 Development of Direct Injection Gasoline J. Harada(et al.)
  2. SAE Paper 970541 Development of Gasoline Direct Injection Engine Y. Iwamoto(et al.)
  3. JSAE Paper 9834015 Combustion Characteristics of a Direct-Injection Stratified Charge S.I. Engine T. Itoh(et al.)
  4. SAE Paper 980494 Improvements of GDI-injector Optimization Tools for Enhanced SI-Engine Combustion Chamber layout M. Pontopidan(et al.)
  5. JSAE Paper 99300063 Mixture Formation of Direct Gasoline Injection Engine; In-Cylinder Gas Sampling using Fast Flame Ionization Detector H. Yamashita(et al.)
  6. SAE Paper 980492 Gasoline DI Engine: The Complete System Approach by Interaction of Advanced Developments Tools M. Wirth(et al.)
  7. SAE Paper 980495 Fuel Injection Strategies to Increase Full-Load Torque Output of a Direct-Injection SI Engine J. Yang;R. W. Anderson
  8. SAE Paper 980498 GDI: Interaction Between Mixture Preparation Combustion System and Injector Performance C. Preussner(et al.)
  9. SAE Paper 980157 Analysis of Mixture Formation of Direct Injection Gasoline Engine M. Kano(et al.)
  10. SAE Paper 1999-01-0170 Direct Injection Gasoline Engines-Combustion and Design J. Geiger(et al.)
  11. 한국자동차공학회 추계학술대회 논문집 v.I 정적챔버내의 고압 가솔린 인젝터의 연료분무특성 권의용, 조은성, 이성풍, 조남효
  12. SAE Paper 900021 How Heat Losses to the Spark Plug Electrodes Affect Flame Kernel Development in an SI Engine S. Pischinger;J. B. Heywood
  13. SAE 960606 The Effect of Electrode Design on Mixture Ignition C. F. Daniels;B. M. Scilzo