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Effect of Fuel Components on Engine Abnormal Combustion
Technical Paper
2012-01-1276
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
These days, improving fuel economy is essential from the view point of energy security and global warming. Engine technologies, such as high compression engines and turbocharged engines, have already been introduced into the market. Furthermore new technologies like lean boosted engines are now being developed. However, these engines are susceptible to abnormal combustion like knocking, auto-ignition, and pre-ignition at low or high engine speeds, because these engines are run at higher combustion pressures and temperatures compared to naturally aspirated engines.
It is well known that fuels have some affect on combustion characteristics. This paper examines the effects of fuel characteristics on various types of abnormal combustion. The results show that temperature and pressure have a direct impact on abnormal combustion. The engine results show that fuel Research Octane Number (RON) has an impact on auto-ignition at the engine started with a fully warmed up engine and pre-ignition at low engine speed. Conversely, Fuel Motor Octane Number (MON) has an impact on the pre-ignition characteristics at high engine speed. Calculation results support that pre-ignition at high engine speed is dominated by a degeneracy chain branching reaction, and that auto-ignition at engine start with a fully warmed engine is dominated by a low temperature oxidation reaction. The calculation results also support that pre-ignition at low engine speed is dominated by not only the hot spot temperature at the moment of pre-ignition, but also the chemical reaction of air fuel mixtures under adiabatic compression period.
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Citation
Sasaki, N. and Nakata, K., "Effect of Fuel Components on Engine Abnormal Combustion," SAE Technical Paper 2012-01-1276, 2012, https://doi.org/10.4271/2012-01-1276.Also In
References
- Nakata, K. Uchida, D. Ota, A. Utsumi, S. et al. “The Impact of RON on SI Engine Thermal Efficiency,” SAE Technical Paper 2007-01-2007 2007 10.4271/2007-01-2007
- Kalghatgi, G. Nakata, K. Mogi, K. “Octane Appetite Studies in Direct Injection Spark Ignition (DISI) Engines,” SAE Technical Paper 2005-01-0244 2005 10.4271/2005-01-0244
- Mittal, V. Heywood, J. “The Shift in Relevance of Fuel RON and MON to Knock Onset in Modern SI Engines Over the Last 70 Years,” SAE Int. J. Engines 2 2 1 10 2010 10.4271/2009-01-2622
- Dahnz, C. Han, K. Spicher, U. Magar, M. et al. “Investigations on Pre-Ignition in Highly Supercharged SI Engines,” SAE Int. J. Engines 3 1 214 224 2010 10.4271/2010-01-0355
- Zahdeh, A. Rothenberger, P. Nguyen, W. Anbarasu, M. et al. “Fundamental Approach to Investigate Pre-Ignition in Boosted SI Engines,” SAE Int. J. Engines 4 1 246 273 2011 10.4271/2011-01-0340
- Sasaki, N. Nakata, K. Kawatake, K. Sagawa, S. et al. “The Effect of Fuel Compounds on Pre-ignition under High Temperature and High Pressure Condition,” SAE Technical Paper 2011-01-1984 2011 10.4271/2011-01-1984
- Shibata, G. Urushihara, T. “The Interaction Between Fuel Chemicals and HCCI Combustion Characteristics Under Heated Intake Air Conditions,” SAE Technical Paper 2006-01-0207 2006 10.4271/2006-01-0207
- Downs, D. Pigneguy, J. H. “An Experimental Investigation into Pre-ignition in the Spark-ignition Engine” I. Mech. E. Automobile Division Proc. 1950 51 125 149
- Downs, D. Theobald, F. B. “The Effect of Fuel Characteristics and Engine Operating Conditions on Pre-ignition” Proc. Instn. Mech. Engrs. 1963 64 178 4
- Menrad, H. Haselhorst, M. Erwig, W. “Pre-Ignition and Knock Behavior of AIcohol Fuels,” SAE Technical Paper 821210 1982 10.4271/821210
- Hamilton, L. Rostedt, M. Caton, P. Cowart, J. “Pre-Ignition Characteristics of Ethanol and E85 in a Spark Ignition Engine,” SAE Int. J. Fuels Lubr. 1 1 145 154 2009 10.4271/2008-01-0321
- ASTM D2699 for RON
- ASTM D2700 for MON
- ASTM E659 for AIT
- Reaction Design CHEMKIN-MFC 2009 Reaction Design
- The Model Fuel Consortium www.modelfuelconsortium.com
- Leppard, W. “The Chemical Origin of Fuel Octane Sensitivity,” SAE Technical Paper 902137 1990 10.4271/902137