Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
권호 표지

Combustion Characteristics of HCCI Engine Fueled DME and Natural Gas(Unbalance of Cylinder-to-Cylinder and Effect of EGR)

DME/천연가스 HCCI 기관의 연소특성(기통 간 불균형과 EGR의 영향)

  • Received : 2010.01.13
  • Accepted : 2010.05.07
  • Published : 2010.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

HCCI engines fueled DME and natural gas have been studied on single-cylinder engine due to availability of reducing on $NO_X$ and PM simultaneously without deteriorating into high thermal efficiency, and thus it is clarified that higher maximum engine load is achieved as DME equivalence is smaller. In this study, combustion tests were accomplished on multi-cylinder engine for practical use of it. When minimum DME equivalence achieved maximum engine load on single-cylinder engine was applied to 4-cylinders engine, there was in unstable running condition that engine revolution fluctuated greatly and cyclically. It is the reason what misfire occurred intermittently with one the same as minimum DME equivalence on single-cylinder due to increase in energy for ignition at No. 1 cylinder with lower cylinder liner temperature. Maximum engine load was achieved by adopting EGR, though it decreased because of knocking at smaller engine load than single-cylinder due to increase in minimum DME equivalence.

Keywords

References

  1. Sato S. et al., 2005, "Basic Research on the Suitable Fuel for HCCI Engine from the Viewpoint of Chemical Reaction", SAE 2005-01-0149.
  2. Shudo T., Ono Y. and Takahashi, T., 2002, "Influence of Hydrogen and Carbon Monoxide on HCCI Combustion of Dimethyl Ether", SAE 2002-01-2828.
  3. Bae C. S. et al., 2007, "The Effects of Hydrogen on DME HCCI Combustion", Trans. of the KSAE, Vol. 15, No. 2, pp. 15-21.
  4. Konno M., and Chen Z., 2005, "Ignition Mechanisms of HCCI Combustion Process Fuelled with Methane/DME Composite Fuel", SAE 2005-01-0182.
  5. Jung S. H. et al., 2005, "Ignition and Combustion Characteristics of DME Premixed with Natural Gas in a HCCI Engine", 18th ICE International Symposium, Paper No. 20056086.
  6. Yamada H., Yoshii M. and Tezaki A., 2005, "Chemical Mechanistic Analysis of Additive Effects in Homogeneous Charge Compression Ignition of Dimethyl Ether", Proc. of the Combustion Institute, Vol. 30, pp. 2773-2780. https://doi.org/10.1016/j.proci.2004.08.253
  7. Maroteaux F. and Noel N., 2006, "Development of a Reduced N-heptane Oxidation Mechanism for HCCI Combustion Modeling", Combustion and Flame, Vol. 146, pp. 246-267. https://doi.org/10.1016/j.combustflame.2006.03.006
  8. Ohtsubo H. et al., 2007, "Influence of Compression Ratio on Performance and Variations in Each Cylinder of Multi-Cylinder Natural Gas Engine with PCCI Combustion", SAE 2007-01-1877.