Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

The Effect of an Aromatic Content on Exhaust Emissions in Low Temperature Diesel Combustion

저온 디젤 연소에서 연료의 방향족 성분이 배기가스에 미치는 영향

  • Han, Man-Bae (Department of Mechanical and Automotive Engineering, Keimyung University)
  • 한만배 (계명대학교 기계자동차공학과)
  • Received : 2010.08.09
  • Accepted : 2010.12.30
  • Published : 2011.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

This study is to investigate the effect of an aromatic content in high cetane number (CN) fuels on exhaust emissions under low temperature diesel combustion, which expands the previous research about an aromatic content in low CN fuels. A 1.9L common rail direct injection diesel engine was run at 1500 rpm 2.6 bar BMEP with four fuel sets: an aromatic content of 20% (A20) or 45% (A45) with CN30, i.e. low CN fuels, and CN55, i.e. high CN fuels. Given experimental conditions, the trend of exhaust emissions in high CN fuels was inconsistent with that of low CN fuels which all produced nearly zero smoke but higher NOx for the high aromatic fuel (CN30-A45). For high CN fuels, however, the low aromatic fuel (CN55-A20) produced lower smoke than the high one (CN55-A45) while NOx was similar to each other. The cause of this discrepancy between high CN and low CN fuels is unclear whether it comes from that CN may be a dominant factor to govern exhaust emissions rather than an aromatic content or that the actual CN value of CN55-A45 is lower than CN55-A20. More decent fuel matrix should be prepared and further experiments are needed to confirm it.

Keywords

References

  1. H. Akagawa, T. Miyamoto, A. Harada, S. Sasaki, N. Shimazaki, T. Hashizume and K. Tsujimura, "Approaches to Solve Problems of the Premixed Lean Diesel Combustion," SAE Transactions - Journal of Engines, Vol.109, SAE 1999-01-0183, 1999.
  2. K. Akihama, Y. Takatori, K. Inagaki, S. Sasaki and A. Dean, "Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature," SAE Transactions - Journal of Engines, Vol.110, SAE 2001-01-0655, 2001.
  3. S. Kimura, O. Aoki, Y. Kitahara and E. Aiyoshizawa, "Ultra-clean Combustion Technology Combining a Low-temperature and Premixed Combustion Concept for Meeting Future Emission Standard," SAE Transactions - Journal of Fuels & Lubricants, Vol.110, SAE 2001-01-0200, 2001.
  4. M. P. B. Musculus, T. Lachaux, L. M. Pickett and C. A. Idicheria, "End-of-injection Over- Mixing and Unburned Hydrocarbon Emissions in Low-temperature-combustion Diesel Engines," SAE Transactions - Journal of Passenger Cars: Mechanical Systems, Vol.116, SAE 2007-01-0907, 2007.
  5. M. Han, D. N. Assanis and S. V. Bohac, "Comparison of HC Species from Diesel Combustion Modes and Characterization of a Heat-up DOC Formulation," Int. J. Automotive Technology, Vol.9, No.4, pp.405-413, 2008. https://doi.org/10.1007/s12239-008-0049-y
  6. M. L. McMillan and R. Halsall, "Fuel Effects on Combustion and Emissions in a Direct Injection Diesel Engine," SAE Transactions - Journal of Fuels and Lubricants, Vol.97, SAE 881650, 1988.
  7. J. B. Heywood, Internal Combustion Engine Fundamentals, McGraw Hill, New York, 1988.
  8. T. Li, Y. Okabe, H. Izumi, T. Shudo and H. Ogawa, "Dependence of Ultra-high EGR Low Temperature Diesel Combustion on Fuel Properties," SAE 2006-01-3387, 2006.
  9. A. M. Ickes, S. V. Bohac and D. N. Assanis, "Effect of Fuel Cetane Number on a Premixed Diesel Combustion Mode," Journal of Engine Res., Vol.10, No.4, pp.251-263, 2009. https://doi.org/10.1243/14680874JER03809
  10. K. Kitano, R. Nishiumi, Y. Tsukasaki, T. Tanaka and M. Morinaga, "Effects of Fuel Properites on Premixed Charge Compression Ignition Combustion in a Direct Injection Diesel Engine," SAE 2003-01-1815, 2003.
  11. S. Kee, A. Mohammadi, Y. Kidoguchi and K. Miwa, "Effects of Aromatic Hydrocarbons on Fuel Decomposition and Oxidation Process in Diesel Combustion," SAE Transactions - Journal of Fuels and Lubricants, Vol.114, SAE 2005-01-2086, 2005.
  12. M. Han, "Effect of Aromatics and T90 Temperature for Low Cetane Number Fuels on Exhaust Emissions in Low Temperature Diesel Combustion," Transactions of KSME B, Vol.34, No.12, pp.1121-1126, 2010.