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Testing and Evaluation of Ignition Improvers for Ethanol in a DI Diesel Engine
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Abstract
The ignition delay of ethanol with different nitrate and polyethylene glycol based ignition improvers was investigated in a single-cylinder DI Diesel engine. The nitrate-based improvers provided a shorter ignition delay than the polyethylene glycol improvers, but the results indicate that the efficiency of the polyethylene glycol improvers increases with the length of the molecular chains. Comparison with reference fuels gives a cetane number of approximately 44 for ethanol with 4% of the best nitrate-based improver versus 40 for ethanol with 7% polyethylene glycol improver. It is shown, that the random ignition delay for all the fuels has a normal distribution, and that the reference fuel of every measurement series has a constant expected ignition delay.
Ignition delay measurements in a constant-volume combustion vessel failed to produce the same trends as in the engine for the ethanol fuels.
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Citation
Simonsen, H. and Chomiak, J., "Testing and Evaluation of Ignition Improvers for Ethanol in a DI Diesel Engine," SAE Technical Paper 952512, 1995, https://doi.org/10.4271/952512.Also In
References
- Schaefer, A. J. Hardenberg, H. O. “Ignition Improvers for Ethanol Fuels” SAE paper 810249 1981
- Simonsen, H. Chomiak, J. “Ignition and Combustion Properties of Alcohol Fuels with Ignition Improvers in Diesel Engines” 21 st Congress of CIMAC Interlaken-Switzerland 1995
- Inomata, T. Griffiths, J. F. Pappin A. J. “The Role of Additives as Sensitizers for the Spontaneous Ignition of Hydrocarbons” 23rd Symposium (International) on Combustion The Combustion Institute Pittsburgh 1990 1759 1766
- Al-Rubaie, M. A. R. Griffiths, J. F. Sheppard, C. G. W. “Some Observations on the Effectiveness of Additives for Reducing the Ignition Delay Period of Diesel Fuels” SAE paper 912333 1991
- Valdmanis, E. Wulfhorst, D. E. “The Effect of Emulsified Fuels and Water Induction on Diesel Combustion” SAE paper 700736 1970
- Dunskus, T. Westwater, J. W. “The Effect of Trace Additives on the Heat Transfer to Boiling Isopropanol” Chem. Eng. Prog. Symp. Ser. 57 32 1961 173 181
- Satcunanathan, S. El-Nesr, M. S. “Effect of Additives on the Cetane Ratings of Diesel Fuels as related to the Ignition Delays of Liquid Fuel Droplets Impinging on a Hot Surface” Proc. IMechE. 186 28 1972 317 321
- Starke, K. “Alcohols as Alternative Fuels for Diesel Engines” MZV - Annual Meeting Stuttgart-Hohenheim 1979
- Heinrich, W. 91 98 1987
- Box, G. E. P. Hunter, W. G. Hunter, J. S. Statistics for Experimenters John Wiley and Sons 0-471-09315-7 1978
- Simonsen, H. Lif, A. “Studies of Ignition Properties of Ethanol Fuels” Swedish Transport and Communications Research Board report Dnr 92-69-742
- “Tentative Method of Test for Ignition Quality of Diesel Fuels by the Cetane Method” ASTM Designation 1958
- Hardenberg, H. O. Ehnert, E. R. “Ignition Quality Determination Problems with Alternative Fuels for Compression Ignition Engines” SAE Paper 811212 1981
- Ecklund, E. E. Bechtold, R. L. Timbario, T. J. McCallum, P. W. “State-of-the-Art Report on the Use of Alcohols in Diesel Engines” SAE Paper 840118 1984
- Henein, N. A. “Cetane Scale: Function, Problems and Possible Solutions” SAE Paper 870584 1987
- Gülder, Ö.L. Glavincevski, B. Burton, G. F. “Ignition Quality Rating Methods for Diesel Fuels - A Critical Appraisal” SAE Paper 852080 1985
- Ladommatos, N. Wood, B. McGrath, N. “A Critical Appraisal of the Ignition Delay Meter Used in Standard Diesel Fuel Cetane Tests” SAE Paper 890418 1989
- Zbierski, K. 145 149 1986
- Sadowski, S. Nocke, J. 556 561 1991
- Saeed, M. N. Henein, N. A. “Combustion Phenomena of Alcohols in C.I. Engines” Journal of Engineering for Gas Turbines and Power 111 439 444 1989
- Manual for the AVL Digital Analyzer system 657 1986
- Råde, L. Rudemo M. Stockholm 1984
- Fiskaa, G. “Determination of the Ignition and Combustion Properties for Diesel Fuels by Constant Volume Combustion Rigs” I Mech E seminar, Fuels for Automotive & Industrial Diesel Engines April 1993
- Datschefski, G. Rickeard, D. J. “Diesel Fuel Ignition Quality Measurement by a Constant Volume Combustion Test” SAE paper 932743 1993
- Siebers, D. L. Edwards, C. F. “Autoignition of Methanol and Ethanol Sprays under Diesel Engine Conditions” SAE paper 870588 1987
- Ryan, T. W. Maymar, M. Ott, D. LaViolette, R. A. MacDowall, R. D. “Combustion and Emission Characteristics of Minimally Processed Methanol in a Diesel Engine without Ignition Assist” SAE paper 940326 1994