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

  • 제34권12호
  • /
  • Pages.1121-1126
  • /
  • 2010
  • /
  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지
DOI QR코드

DOI QR Code

저온디젤연소에서 저세탄가 연료의 방향족 및 T90 온도가 배기가스에 미치는 영향

Effects of Aromatics and T90 Temperature of Low Cetane Number Fuels on Exhaust Emissions in Low-Temperature Diesel Combustion

  • 한만배 (계명대학교 기계자동차공학과)
  • Han, Man-Bae (Dept. of Mechanical and Automotive Engineering, Keimyung Univ.)
  • 투고 : 2010.08.18
  • 심사 : 2010.09.29
  • 발행 : 2010.12.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

1.9L 커먼레일 직접분사 디젤 엔진을 이용하여 1500rpm 2.6bar BMEP 에서 다량의 EGR (약 41%)과 연료분사 제어를 통한 저온디젤연소 영역에서 연료의 특성이 연소와 배기가스에 미치는 영향을 분석하 였다. 사용한 연료는 세탄가 30 에 대하여 방향족 성분 (20%: A20, 45%: A45)과 T90 온도($270^{\circ}C$: T270, $340^{\circ}C$: T340)의 조합으로 네 개이다. 주어진 엔진 운전 영역에서 실험계획법을 이용하여 방향족 성분 및 T90 온도에 따른 연소 및 배기가스에 미치는 영향을 분석하였다. 착화지연 기간은 T90 온도가 지배적인 인자로 T90 온도 증가에 따라 착화지연 기간도 증가하였다. 저세탄가에 의한 착화지연 기간의 증가로 네 가지 연료 모두 PM 배출은 거의 없었다. NOx 배출은 방향족 성분이 지배적인 인자로 방향족 성분증가에 따라 NOx 배출이 증가하였다.

This study is to investigate the effects of aromatics and T90 for low cetane number (CN) fuels on combustion and exhaust emissions in low-temperature diesel combustion. We use a 1.9-L common rail direct injection diesel engine at 1500 rpm and 2.6 bar BMEP. Low temperature diesel combustion was achieved via a high external EGR rate and strategic injection control. The tested fuels four sets: the aromatic content was 20% (A20) or 45% (A45) and the T90 temperature was $270^{\circ}C$ (T270) or $340^{\circ}C$ (T340) with CN 30. Given the engine operating conditions, the T90 was the stronger factor on the ignition delay time, resulting in a longer ignition delay time for higher T90 fuels. All the fuels produced nearly zero PM because of the extension of the ignition delay time induced by the low cetane number. The aromatic content was the main factor that affected the NOx and the NOx increased with the aromatic content.

키워드

참고문헌

  1. Akagawa, H., Miyamoto, T., Harada, A., Sasaki, S., Shimazaki, N., Hashizume, T. and Tsujimura, K., 1999, "Approaches to Solve Problems of the Premixed Lean Diesel Combustion," SAE Transactions - Journal of Engines, Vol. 109, SAE Paper No. 1999-01-0183.
  2. Akihama, K., Takatori, Y., Inagaki, K., Sasaki, S. and Dean, A., 2001, "Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature," SAE Transactions - Journal of Engines, Vol. 110, SAE Paper No. 2001-01-0655.
  3. Kimura, S., Aoki, O., Kitahara, Y. and Aiyoshizawa, E., 2001, "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 Paper No. 2001-01-0200.
  4. Musculus, M. P. B., Lachaux, T., Pickett, L. M. and Idicheria, C. A., 2007, "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 Paper No. 2007-01-0907.
  5. Han, M., Assanis, D. N. and Bohac, S. V., 2008, "Comparison of HC Species from Diesel Combustion Modes and Characterization of a Heat-up DOC Formulation,” Int. J. of Automotive Technology, Vol. 9, No. 4, pp. 405-413. https://doi.org/10.1007/s12239-008-0049-y
  6. McMillan, M. L. and Halsall, R., 1988, "Fuel Effects on Combustion and Emissions in a Direct Injection Diesel Engine,” SAE Transactions - Journal of Fuels and Lubricants, Vol. 97, SAE paper No.881650.
  7. Kim, H.M. Lee, D.H., Park, S.K., Choi, K.S. and Wang, H.M., 2008, "An Experimental Study on Heat Exchange Effectiveness in the Diesel Engine EGR Coolers," Journal of Mechanical Science and Technology, Vol. 22, No. 2, pp. 361-366. https://doi.org/10.1007/s12206-007-1102-x
  8. Han, M., 2010, “Hydrocarbon Speciation in Low Temperature Diesel Combustion,” Transactions of the KSME B, Vol. 34, No.4, pp.417-422.
  9. Li, T., Okabe, Y., Izumi, H., Shudo, T. and Ogawa, H., 2006, "Dependence of Ultra-High EGR Low Temperature Diesel Combustion on Fuel Properties,” SAE paper No. 2006-01-3387.
  10. Ickes, A. M., Bohac, S. V. and Assanis, D. N., 2009, "Effect of Fuel Cetane Number on a Premixed Diesel Combustion Mode,” Journal of Engine Res., Vol. 10, No. 4, pp. 251-263. https://doi.org/10.1243/14680874JER03809
  11. Kitano, K., Nishiumi, R., Tsukasaki, Y., Tanaka, T. and Morinaga, M., 2003, "Effects of Fuel Properites on Premixed Charge Compression Ignition Combustion in a Direct Injection Diesel Engine,” SAE paper No. 2003-01-1815.
  12. Kee, S., Mohammadi, A., Kidoguchi, Y. and Miwa, K., 2005, "Effects of Aromatic Hydrocarbons on Fuel Decomposition and Oxidation Process in Diesel Combustion,” SAE Transactions - Journal of Fuels and Lubricants, Vol. 114, SAE Paper No. 2005-01-2086.