DOI QR코드

DOI QR Code

The Experimental Study on the Low-temperature Combustion Characteristics of DME Fuel in a Compression Ignition Engine

  • Received : 2017.11.13
  • Accepted : 2017.12.19
  • Published : 2017.12.30

Abstract

The aim of this work is to investigate the combustion and exhaust emission characteristics of low-temperature combustion (LTC) at various EGR test conditions using a single cylinder common-rail diesel engine. In high EGR rate combustion mode with DME fuel, 30% (${\Phi}=0.61$) and 50% (${\Phi}=0.86$) of EGR were respectively examined, and then the combustion, exhaust emissions, nano-particle characteristics of each cases were measured. From these results, it revealed that The ignition delay and combustion duration are prolonged as the increase of EGR rate. In addition, at an advanced injection timing (BTDC $30^{\circ}$), ignition delays were fairly increased because the dilution effect of EGR and also low charge in-cylinder temperature created a lean mixture, thus decreased the peak release rate.

Keywords

References

  1. J. B. Heywood, "Internal combustion engine fundamentals", McGraw-Hill, 1988.
  2. C. D. Marriott, M. A. Wiles, J. M. Gwidt, S. E. Parrish, "Development of a naturally aspirated spark ignition direct-injection flex-fuel engine", SAE paper 20008-01-0319, 2008.
  3. C. S. Lee, K. H. Lee and D. S. Kim, "Experimental and numerical study on the combustion characteristics of partially premixed charge compression ignition engine with dual fuel," Fuel, Vol. 82, No. 5, pp. 553-560, 2003. https://doi.org/10.1016/S0016-2361(02)00319-8
  4. D. J. Lee, M. Y. Kim, H. G. Roh, D. S. Kim, J. H. Lee and C. S. Lee, "Combustion and exhaust characteristics of a common-rail diesel engine with homogeneous charge compression ignition combustion," Spring Conference Proceedings, KSAE, pp. 357-362, 2004.
  5. M. Y. Kim, S. H. Bang, and C. S. Lee, "Experimental investigation of spray and combustion characteristics of dimethyl ether in a common-rail diesel engine", Energy & Fuels, Vol. 21, pp. 793-800, 2007. https://doi.org/10.1021/ef060310o
  6. E. Rolf, "Comparison of heat release and NOx formation in a DI diesel engine running on DME and diesel fuel", SAE paper 2001-01-0651, 2001.
  7. N. A. Henein, B. Bhattacharyya, J. Schipper, A. Kastury, W. Bryzik, "Effect of injection pressure and swirl motion on diesel engine-out emissions in conventional and advanced combustion regimes", SAE paper 2006-01-0076, 2006.
  8. D. Choi, P. C. Miles, H. H. Yun, R. D. Reitz, "A parametric study of low-temperature, late-injection combustion in a HSDI diesel engine", Spec Issue Adv Combust Technol Intern Combust Engines, Vol. 48, No. 4, pp. 656-664, 2005.
  9. D. S. Kim, Combustion and Emission Characteristics of Premixed Charge Compression Ignition Diesel Engine, Ph.D. Thesis, Department of Mechanical Engineering, Hanyang University, 2004.