Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Pan-shaped Spray Characteristics of GDI High Pressure Slit Nozzle Injector

가솔린 직접분사식 고압 슬릿 노즐 분사기의 팬형 분무 특성 고찰

  • Song, Bhum-Keun (Graduated School of Precision Mechanical Engineering, Chonbuk University) ;
  • Kim, Won-Tae (Chonbuk National University Automobile Research Institute) ;
  • Kang, Shin-Jae (Division of Mechanical & Aerospace System Engineering, Chonbuk University)
  • 송범근 (전북대학교 대학원) ;
  • 김원태 (전북대학교 자동차 산학협력원) ;
  • 강신재 (전북대학교 기계항공시스템공학부)
  • Published : 2005.11.01
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Abstract

A new stratified charge combustion system has been introduced and developed for GDI engines. Before this new GDI system, the stratified mixture was formed by a high pressure swirl injector. But, the special feature of new system is employed of a thin fan-shaped fuel spray formed by a slit type nozzle. Also, this system has been adopted a shell-shaped piston cavity. We made high pressure gasoline injection system and investigated the fan-shaped spray characteristics such as spray tip penetration, spray angle, SMD and velocities of droplets using PDPA(Phase Doppler Particle Analyzer) system and spray visualization system to obtain the concept of the new design and the fundamental data for the next generation GDI system. The experiment was performed at the injection pressures of 5 and 9MPa under the atmospheric condition.

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References

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