Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Study of Combustion Characteristics with Variations of Combustion Parameter in Ultra-Lean LPG Direct Injection Engine

연소제어인자의 변화에 따른 직접분사식 초희박 LPG엔진의 연소특성 연구

  • Park, Yun Seo (Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Park, Cheol Woong (Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Oh, Seung Mook (Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Kim, Tae Young (Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Choi, Young (Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Lee, Yong Gyu (Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials)
  • 박윤서 (한국기계연구원 그린동력연구실) ;
  • 박철웅 (한국기계연구원 그린동력연구실) ;
  • 오승묵 (한국기계연구원 그린동력연구실) ;
  • 김태영 (한국기계연구원 그린동력연구실) ;
  • 최영 (한국기계연구원 그린동력연구실) ;
  • 이용규 (한국기계연구원 그린동력연구실)
  • Received : 2012.12.27
  • Accepted : 2013.04.09
  • Published : 2013.06.01
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Abstract

Nowadays, automotive manufacturers have developed various technologies to improve fuel economy and reduce harmful emissions. The ultra-lean direct injection engine is a promising technology because it has the advantage of improving thermal efficiency through the deliberate control of fuel and ignition. This study aims to investigate the development of a spray-guided-type lean-burn LPG direct injection engine through the redesign of the combustion system. This engine uses a central-injection-type cylinder head in which the injector is installed adjacent to the spark plug. Fuel consumption and combustion stability were estimated depending on the ignition timing and injection timing at various air-fuel ratios. The optimal injection timing and ignition timing were based on the best fuel consumption and combustion stability.

오늘날 전 세계의 자동차 회사들은 연비를 향상시키고 배기가스를 저감시키기 위해 다양한 기술을 개발하고 있다. 그 중 직접분사식 초희박 연소기술은 연료제어의 정확도를 향상시켜 연소 효율을 극대화하고 초희박 연소를 통해 연비를 향상 시킬 수 있는 차세대 기술로 평가받고 있다. 따라서 기존 가스엔진에 초희박 직접분사 기술을 적용한 초희박 LPG 직접분사 엔진을 개발하기 위해 $2{\ell}$ 급 MPI 엔진을 베이스 엔진으로 실린더 헤드를 재설계하였다. 재설계된 헤드는 초희박 연소를 구현하기 위해 인젝터와 점화플러그가 헤드 중앙에 장착되는 분무유도방식 연소시스템을 적용하였다. 연료 분사 압력별 연료 분사 시기와 점화 시기의 변경을 통해 연료 소비율과 연소 안정성을 측정하였으며 이를 통해 최적연료 분사시기와 점화시기를 선정하였다.

Keywords

References

  1. Schunemann, S. E., Durst, B., Fischer J., and Witt, A., 2006, "Potentials of the Spray-guided BMW DI Combustion System," SAE 2006-01-1265.
  2. Basshuysen, R. v., 2009, Gasoline Engine with Direct Injection: Processes, Systems, Development, Potential, Vieweg + Teubner in GWV Fachverlage GmbH, Wiesbaden.
  3. Pauly, T., Franoschek, S., Hoyer, R. and Echhoff, S., 2010, "Cost and Fuel Economy Driven Aftertreatment Solution for Lean GDI," SAE 2010-01-0363.
  4. Park, C. W., Oh, J. W. and Kim, H. S., 2012, "A Study on the Lean Combustion Characteristics with Variation of Combustion Parameter in a Gasoline Direct Injection Engine," Trans. of KSAE, Vol. 20, No. 4, pp. 39-45. https://doi.org/10.7467/KSAE.2012.20.4.039
  5. Kim, S. J., Kim, Y. N. and Lee, J. H., 2008, "Analysis of the In-Cylinder Flow, Mixture Formation and Combustion Processes in a Spray-Guided GDI Engine," SAE 2008-01-0142.
  6. Ramesh, A., 2003, "An Experimental Study of Cyclic Variations in a Lean Burn Natural Gas Fuelled Spark Ignition Engine," ASME ICEF2003-772.
  7. Oh, H., Lee, M., Park, J. and Bae, C., 2011, "Effect of Injection Pressure and Injection Timing on Combustion Characteristics of Spray-guided Direct-injection Spark-ignition Engine under Lean Stratified Combustion Operation," Trans. Korean Soc. Mech. Eng. B, Vol. 35, No. 10, pp. 981-987. https://doi.org/10.3795/KSME-B.2011.35.10.981
  8. Chang, W. -S., Kim, Y. -N. and Kong, J. -K., 2007, "Design and Development of a Spray-guided Gasoline DI Engine," SAE 2007-01-3531.
  9. Oh, H., Jung, J. and Bae, C., 2012, "Study on Stratified Combustion Process and PM Emission Characteristic in a DISI Engine Using Natural Flame Luminosity Visualization," 2012 KSAE Annual conference, pp. 139-148.
  10. Oh, H., Lee, M., Park, J. and Bae, C., 2013, "Effect of Injection Pressure and Injection Timing on Spray and Flame Characteristics of Spray-Guided Direct-Injection Spark-Ignition Engine Under Lean Stratified Combustion Operation," Trans. Korean Soc. Mech. Eng. B, Vol. 37, No. 3, pp. 221-228. https://doi.org/10.3795/KSME-B.2013.37.3.221

Cited by

  1. An experimental study on spray and combustion characteristics of LPG for application in direct-injection vol.30, pp.5, 2016, https://doi.org/10.1007/s12206-016-0444-7
  2. Study of Combustion Characteristics with Compression Ratio Change in Ultra-Lean LPG Direct Injection Engine vol.38, pp.10, 2014, https://doi.org/10.3795/KSME-B.2014.38.10.837