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Fuel Octane Effects in the Partially Premixed Combustion Regime in Compression Ignition Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 02, 2009 by SAE International in United States
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Previous work has showed that it may be advantageous to use fuels of lower cetane numbers compared to today's diesel fuels in compression ignition engines. The benefits come from the longer ignition delays that these fuels have. There is more time available for the fuel and air to mix before combustion starts which is favourable for achieving low emissions of NOx and smoke though premixing usually leads to higher emissions of CO and unburned hydrocarbons.
In the present work, operation of a single-cylinder light-duty compression ignition engine on four different fuels of different octane numbers, in the gasoline boiling range, is compared to running on a diesel fuel. The gasoline fuels have research octane numbers (RON) of 91, 84, 78, and 72. These are compared at a low load/low speed condition (4 bar IMEP / 1200 rpm) in SOI sweeps as well as at a higher load and speeds (10 bar IMEP / 2000 and 3000 rpm) in EGR sweeps. There is a NOx advantage for the 91 RON and 84 RON fuels at the lower load. At the higher load, NOx levels can be reduced by increasing EGR for all gasolines while maintaining much lower smoke levels compared to the diesel. In the conditions studied, the optimum RON range might be between 75 and 85.
CitationHildingsson, L., Kalghatgi, G., Tait, N., Johansson, B. et al., "Fuel Octane Effects in the Partially Premixed Combustion Regime in Compression Ignition Engines," SAE Technical Paper 2009-01-2648, 2009, https://doi.org/10.4271/2009-01-2648.
- Yanagihara, H. Sato, Y. Minuta, J., “A simultaneous reduction in NO x and soot in diesel engines under a new combustion system (Uniform Bulky Combustion System - UNIBUS)”, 17th International Vienna Motor Symposium 303 314 1996
- Kimura, S. Osama, A. Ogama, H. Muranaka, S. “New combustion concept for ultra-clean and high-efficiency small Dl diesel engines” SAE 1999-01-3681
- Akagawa, H. Miyamoto, T. Harada, A. Sasaki, S. Shimazaki, N. Hashizume, T. Tsujimura, K. “Approaches to Solve Problems of the Premixed Lean Diesel Combustion” SAE 1999-01-0183
- Okude, K. Mori, K. Shiino, S. Moriya, T. “Premixed Compression Ignition (PCI) Combustion for Simultaneous Reduction of NO x and Soot in Diesel Engine” SAE 2004-01-1907
- Mueller, C.J., Martin, G.C., Briggs, T.E., Duffy, K.P., “An Experimental Investigation of In-Cylinder Processes Under Dual-Injection Conditions in a Dl Diesel Engine” SAE 2004-01-1843
- Kalghatgi, G.T. Risberg, P. Angstrom, H-E “Advantages of a fuel with high resistance to auto-ignition in late-injection, low-temperature, compression ignition combustion” SAE 2006-01-3385 SAE Transactions
- Kalghatgi, G.T. Risberg, P. Angstrom, H-E “Partially pre-mixed auto-ignition of gasoline to attain low smoke and low NO x at high load in a compression ignition engine and comparison with a diesel fuel” SAE 2007-01-0006
- Musculus, M.P.B. Lachaux, T. Pickett, L.M. Idicheria, C.A. “End-of-lnjection Over-Mixing and Unburned Hydrocarbon Emissions in Low-Temperature-Combustion Diesel Engines” SAE 2007-01-0907
- Hanson, R, Splitter, D Reitz, “Operating a Heavy-Duty Direct-Injection Compression-Ignition Engine with Gasoline for Low Emissions” SAE 2009-01-1442
- Manente, V. Johansson, B. Tunestal, P. “Partially Premixed Combustion at High Load using Gasoline and Ethanol, a Comparison with Diesel” SAE 2009-01-0944
- Manente, V. Johansson, B. Tunestal, P. “Half Load Partially Premixed Combustion, PPC, with High Octane Number Fuels. Gasoline and Ethanol Compared with Diesel” SIAT 2009 295
- Kalghatgi, G. Hildingsson, L Johansson, B. “Low NO x and low smoke operation of a diesel engine using gasoline-like fuels", Proceedings of the ASME Internal Combustion Engine Division 2009 ICES2009-76034
- Manente, V. Johansson, B. Tunestal, P. “Characterisation of partially premixed combustion with ethanol: EGR sweeps, low and maximum loads", Proceedings of the ASME Internal Combustion Engine Division 2009 ICES2009-76165
- Tsurushima, T. Kunishima, E. Asaumi, Y. Aoyagi, Y. Enomoto, Y. “The Effect of Knock on Heat Loss in Homogeneous Charge Compression Engines” SAE 2002-01-0108
- Kalghatgi, G.T. “Auto-ignition quality of practical fuels and implications for fuel requirements of future SI and HCCI engines” SAE 2005-01-0239 2005
- Risberg, P. Kalghatgi, G.T. Angstrom H-E “Autoignition quality of diesel-like fuels in HCCI engines” SAE 2005-01-2127 , SAE Transactions
- Heywood, J.B. “Internal combustion engine fundamentals", chapter 11, McGraw Hill 1988
- Xue, H. Aggarwal, S.K. “NO x emissions in n-heptane/air partially premixed flames", Combust. Flame 132 723 741 2003
- Li, T. Okabe, Y. Izumi, H. Ogawa, H. “Dependence of ultra-high EGR low temperature combustion on fuel properties” SAE 2006-01-3387
- Schleyer, C.H. Duffy, K.P Liechty, M.P. Hardy, W.L. Bessonette, P.W. “Effects of fuel property changes on heavy duty HCCI combustion” SAE 2007-01-0191
- Colban, W.F. Miles, P.C. Oh, S. “On the cyclic variability and sources of unburned hydrocarbon emissions in low temperature diesel combustion systems” JSAE 20077143/ SAE 2007-01-1837
- Opat, R. Ra, Y. Manuel, A. Gonzalez, D. Krieger, R Reitz, R.D. Foster, D.E. Durrett, R.P. Siewert, R.M. “Investigation of mixing and temperature effects on HC/CO emissions for highly dilute low temperature combustion in a light duty diesel engine” SAE 2007-01-0193