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An Experimental Study on Injection and Durability Characteristics of Common-rail Injector According to mixture Ratio of Bio-diesel

바이오 디젤 혼합비에 따른 커먼레일 인젝터의 분사 및 내구특성에 관한 실험 연구

  • 임석연 (충남대학교 기계금속공학 교육과) ;
  • 김태범 (충남대학교대학원) ;
  • 유상석 (충남대학교 기계공학과)
  • Received : 2011.02.16
  • Accepted : 2011.03.15
  • Published : 2011.03.30

Abstract

An object of this study is to understand the correlation of injection characteristics and injector dimensions according to biodiesel mixture. The Injection characteristics of different types of common-rail injectors are the number of nozzle holes (5~8), jet cone angle ($146^{\circ}{\sim}153^{\circ}$), hydraulic flow rate (830~900 ml/min) injection quantity and response time. Prior to characteristic experiment, the reference injector has been selected in 6 candidates injectors under the investigation of injected quantity according to the biodiesel mixture so that injector type can be determined. The injector is used for the characteristic experiment which varied the various operating conditions including pressure 23 MPa, 80 MPa, 160 MPa, changing in injection duration 0.16 ms~1.2 ms and even mixture ratio. The result shows that the nozzle hole number and cone angle influence the injection quantity much more than nozzle hole diameter at low injection pressure and the nozzle hole diameter at high injection pressure, post injection duration.

Keywords

References

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