Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Performance Characteristics with Various Fuel Composition and Temperature for an External Type Fuel Pump in LPLi System

LPLi 시스템에서 외장형 펌프의 연료조성 및 온도에 따른 성능특성 연구

  • 남덕우 (경원대학교 대학원 기계공학과) ;
  • 윤준규 (경원대학교 기계.자동차공학과) ;
  • 임종한 (경원대학교 기계.자동차공학과)
  • 투고 : 2011.02.14
  • 심사 : 2011.06.16
  • 발행 : 2011.07.31
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초록

Since LPG (Liquefied petroleum gas) fuel supply system has an advantage of low emission characteristics, many studies have been conducted. In spite of the advantage of LPG supply system, a higher vapor pressure and lower viscosity than diesel or gasoline fuel may cause unstable running of fuel pump by the deterioration in lubrication performance and chemical reaction with rubber parts than that of diesel and gasoline fuel. Therefore its physical properties can cause the deterioration of durability. In this research, we developed an external type LPG pump which has the advantage of the price competitiveness and the convenient maintenance for LPLi system. The experiments were carried out in order to assess characteristics of the external type fuel pump at different fuel composition and temperature. As a result, there aren't any differences between internal and external type pump performance. It is observed that the same level of efficiency was maintained for both pumps as flow rate was increased with higher fuel temperature and more contents of propane in the fuel. And the pressure difference in LPLi system is maintained at constant with the various fuel compositions and temperatures due to their own characteristics of fuel supply system.

LPG 연료공급방식은 배출가스를 저감시킬 수 있는 유용한 시스템으로 연구가 지속적으로 진행되고 있다. LPG는 경유와 휘발유보다 높은 증기압과 낮은 점도와 표면장력을 유지하므로 고무류와 화학 반응에 따른 연료펌프의 기계적인 손상으로 내구성이 저하되고 있는 실정이다. 본 연구에서는 이러한 문제점을 해결하기 위해 LPLi 시스템에서 유지보수의 편리함과 가격경쟁을 위해 개발된 외장형 펌프를 사용하여 LPG 연료의 조성 및 온도에 따른 특성을 평가하고자 실험을 하였다. 그 결과로서, 내장형 펌프와 외장형 펌프의 성능차이는 거의 없으며 프로판 함유율이 높고, 연료온도가 높아짐에 따라 유량은 많아지나 펌프효율은 거의 차이가 없었다. 또한 LPG 자동차 연료공급장치의 특성상 연료조성 및 온도변화에 따른 차압도 거의 일정하게 나타내었다.

키워드

참고문헌

  1. Y. J.Kim, K. B. Kim and K. H. Lee "The spray characteristics of a liquid phase LPG port injection type injector for a remodeled diesel engine", SAE 2009-01-1879, 2009. https://doi.org/10.4271/2009-01-1879
  2. D. S. Baik, "A Study on emission characteristics in a LPG vehicle", Transaction of KAIST, vol. 7, no. 6, pp. 993-997, 2006.
  3. D. R. Kim, LPi Engine System, US patent 7181073, 2007.
  4. K. Y. Kang, D. Y. Lee, S. M. Oh and C. U. Kim, "Performance of a liquid phase LPG injection engine for heavy-duty vehicles", SAE 2001-01-1958, 2001. https://doi.org/10.4271/2001-01-1958
  5. Z. Wang, B. Deng Y. Han and H. Wang, "Combustion and emissions characteristics of a small spark ignited LPG engine", SAE 2002-01-1738, 2002. https://doi.org/10.4271/2002-01-1738
  6. S. Yamaguchi, M. Ishii, H. Yasujawa, S. Tsusaka, B. Takigawa, H. Ono and M. Tanuma, "Research and development of LPLi liquid fuel injection system(3rd. Report)-Fuel composition and exhaust emission performance of LPG vehicle with liquid injection system-",JSAE 200350387, 2003.
  7. B. Lutz, R. Stanglmaier and R. Matthews, "The effects of fuel composition, system design, and operating conditions on in-system vaporization and hot start of a liquid-phase LPG injection system", SAE 981388, pp.43-60. 1998. https://doi.org/10.4271/981388
  8. T. S. Gang and J. G. Sim, "Development of fuel pump for LPLi", KSAE Fall Conference Proceeding, pp. 525-530, 2004.
  9. S. N. Lee, and S. W. Kim, "A Study on performance characteristics for a mini turbo-pump", Journal of the Research Institute of Technology, vol. 18, no. 2, 2003.
  10. W. Li, "Effect of viscosity of fluids on centrifugal pump performance and flow pattern in the impeller", International Journal of Heat and Fluid Flow, vol. 21, pp. 207-212, 2002. https://doi.org/10.1016/S0142-727X(99)00078-8