한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제20권2호
  • /
  • Pages.90-97
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  • 2012
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  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
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분위기 압력변화에 따른 DME 커먼레일 연료 분사 시스템의 분무 특성에 관한 연구

An Investigation on the Spray Characteristics of DME Common Rail Fuel Injection System with Variation of Ambient Pressure

  • 이세준 (울산대학교 대학원 기계자동차공학과) ;
  • 오세두 (자동차부품연구원 그린동력시스템센터) ;
  • 정수진 (자동차부품연구원 그린동력시스템센터) ;
  • 임옥택 (울산대학교 기계자동차공학부)
  • Lee, Se-Jun (Graduate School of Mechanical and Automotive Engineering, Ulsan University) ;
  • Oh, Se-Doo (Center of Green Powertrain, Korea Automotive Technology Institute) ;
  • Jeong, Soo-Jin (Center of Green Powertrain, Korea Automotive Technology Institute) ;
  • Lim, Ock-Taeck (Department of Mechanical and Automotive Engineering, Ulsan University)
  • 투고 : 2011.03.14
  • 심사 : 2011.08.23
  • 발행 : 2012.03.01
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초록

It is investigated of the DME spray characteristics about varied ambient pressure and fuel injection pressure using the common rail fuel injection system when the nozzle holes diameter is varied. The common rail fuel injection system and fuel cooling system is used since DME has compressibility and vaporization in atmospheric temperature. The fuel injection quantity and spray characteristics were measured. The spray was analyzed of spray shape, penetration length, and spray angle at the six nozzle holes. The 2 types injector were used, the one was 0.166 mm diameter the other one was 0.250 mm diameter. The ambient pressure which is based on gage pressure was 0 MPa, 2.5 MPa, and 5 MPa. The fuel injection pressure was varied by 5 MPa from 35 MPa to 70 MPa. When using the converted injector, compared to using the common injector, the DME injection quantity was increased 127 % but it didn't have the same heat release. Both of the common and converted injector had symmetric spray shapes. In case of converted injector, there were asymmetrical spray shapes until 1.2 ms, but after 1.2 ms the spray shape was symmetrical. Compared with the common and converted injector, the converted injector had shorter penetration length and wider spray angle than the common injector.

키워드

참고문헌

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피인용 문헌

  1. Influence of nozzle hole diameter and orifice diameter on dme spray to get the similar heat value with diesel spray using the constant volume chamber vol.17, pp.6, 2016, https://doi.org/10.1007/s12239-016-0100-3
  2. Experimental Research on the Injection Rate of DME and Diesel Fuel in Common Rail Injection System by Using Bosch and Zeuch Methods vol.11, pp.2, 2018, https://doi.org/10.3390/en11020273