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Properties, Performance and Emissions of Medium Concentration Methanol-Gasoline Blends in a Single-Cylinder, Spark-Ignition Engine
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Abstract
Methanol-gasoline blends containing 30 to 70 percent by volume methanol have potential to eliminate, or at least alleviate, major technical problems with the use of neat methanol such as safety, cold start and the reduced vehicle range. However, little information exits on their properties, performance and emissions.
Experiments were carried out in a spark-ignited, single-cylinder, variable compression ratio, Waukesha RDM engine with primarily commercial grade unleaded gasoline, commercial grade methanol, M30, M50 and M70 methanol-gasoline blends to compare efficiency, performance and emissions characteristics. The fuels were compared at their knock-limited compression ratios and MBT spark-timing. In addition, fuel properties, such as research and motor octane qualities, volatility, heating values and cloud points of methanol-gasoline blends were determined.
The addition of methanol to gasoline influenced favorably: octane quality, lean limit, knock-limited compression ratio, engine thermal efficiency power, and NOx emissions. Moreover, in all cases, the effect was nonlinear. Practically all of the benefit of methanol addition was achieved when the methanol content reached about 50 percent by volume. There were some undesirable effects of blending methanol into gasoline, namely phase separation, and increased emissions of unburned methanol and formaldehyde, particularly at higher methanol concentrations.
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Sapre, A., "Properties, Performance and Emissions of Medium Concentration Methanol-Gasoline Blends in a Single-Cylinder, Spark-Ignition Engine," SAE Technical Paper 881679, 1988, https://doi.org/10.4271/881679.Also In
References
- Testimonies given by representatives from General Motors, Ford, Environmental Protection Agency, Department of Energy, Cummins Engines, and Chrysler before the House Energy and Commerce Subcommittee on Energy and Power June 17 1987
- Bardon M. F. Rao V. K. Gardiner D. P. “An Experimental and Theoretical Comparison of Methanol and Gasoline Starting Performance,” Proceedings of the VI International Symposium on Alcohol Fuels Technology Ottawa, Canada May 1984 1 16
- Browning L. H. Raghuraman G. “A Detailed Study of Alcohol Cold Starting,” ibid. 1 63
- Fanick E.R. et.al. “Safety Related Additives for Methanol Fuel,” Society of Automotive Engineers, Paper 830900 November 1983
- Piquette R. et al. “Safety Aspects of the Use of Alcohol fuels in Road Vehicles,” Proceedings of the VII International Symposium on Alcohol Fuels Paris, France October, 1986 415
- Schwartz S. E. “Effects of Methanol, Water, and Engine Oil on Engine-Lubrication System Elastomers,” ibid. 178
- Espinola S. A. Pefley R.K. Tsai K.C. “Corrosion and Wear Mechanisms in Alcohol Fueled Engines,” Proceedings of the VI International Symposium on Alcohol Fuels Technology 1 148
- Nichols Roberta J. et al “Options for the Introduction of Methanol as a Transportation Fuel” Society of Automotive Engineers, Paper 872166 November 2-5 1987
- Jackson R. G. “The Use of Medium Methanol Blends and On-Site Blending to Implement the Introduction of Methanol to the Motor Fuel Market,” Proceedings of the VI International Symposium on Alcohol Fuel Technology 2 301
- Tsukasaki Y. Imamura Y. Sami H. lnoue T. “Methanol Fueled Vehicle Development in Toyota,” Proceedings of the VII International Symposium on Alcohol Fuels 154
- Brinkman N. D. “Effect of Compression Ratio on Exhaust Emissions and Performance of a Methanol-Fueled Single-Cylinder Engine,” Society of Automotive Engineers, Paper 770791 September 1977
- Most W. J. Longwell J. P. “Single-cylinder Engine Evaluation of Methanol - Improved Energy Economy and Reduced NOx,” Society of Automotive Engineers, Paper 750119 February 1975
- Hsia J. Kuo L.K. Lin C. S. Liu J.T. Chou T. L. “Effects of Methanol-Gasoline Blends on Performance, Emissions and Wear in SI Engines” Proceedings of the VII International Symposium on Alcohol Fuels 136
- Stemper K. R. “Fleet Trials Using Methanol-Gasoline Blends,” Proceedings of the IV International Symposium on Alcohol Fuels Technology Guaruja, Brasil, Instituto De Pesquisas Tecnologicas do Estado do Sao Paolo October, 1980 B 50
- Wiens F. J. et.al. “California's Alcohol Fleet Test Program - Final Results,” Proceedings of the VI International Symposium on Alcohol Fuels Technology 3 367
- Menrad H. et.al. “Alcohol Fuel Vehicles of Volkswagen,” Society of Automotive Engineers, Paper 820968 August 1982
- Lebedev S. R. Burmistrov O. A. Pirogov Yu. N. “Prediction of Phase Stability of Methanol-Blend Gasolines in Relation to Their Composition,” Chemistry and Technology of Fuels and Oils 20 1984 352 354
- Eceleston B. H. Cox F. W. Physical Properties of Gasoline/Methanol Mixtures U. S. Department of Energy January 1977
- Cox F. W. Component Relationships within Two-Phase Gasoline /Methanol/Water Systems U. S. Department of Energy February 1979
- Furey R. L. “Volatility Characteristics of Gasoline-Alcohol and Gasoline-Ether Fuel Blends,” Society of Automotive Engineers, Paper 852116 October 1985
- Moulton D. S. Sefer Norman R. Naegeli D. W. Properties and Economics of Methanol-Gasoline Blends with High Methanol Content U. S. Department of Energy February 1985 10
- Hunwartzen I. “Modification of CFR Test Engine Unit to Determine Octane Numbers of Pure Alcohols and Gasoline-Alcohol Blends,” Society of Automotive Engineers, Paper 820002 February 1982
- Nichols Roberta
- Moulton D. S. Sefer Norman Naegeli D. W. 13
- Stebar R. F. Brinkman N. D. “A Comparison of Methanol and Dissociated Methanol Illustrating Effects of Fuel Properties on Engine Efficiency-Experiments and Thermodynamic Analyses,” Society of Automotive Engineers, Paper 850217 February 1985
- Stivender D. L. “Development of a Fuel-Based Mass Emission Measurement Procedure,” Society of Automotive Engineers, Paper 710604 June 1971
- Patel K. S. Henein N. A. “Burning Velocities in Methanol-indolene Air Mixtures in a CFR Engine,” Society of Automotive Engineers, Paper 850111 1985
- Ebersole G. D. Manning F. S. “Engine Performance and Exhaust Emissions: Methanol versus Isooctane,” Society of Automotive Engineers August 1972
- Potter Robert A. General Motors Corporation 1985
- Leppard W. R. “Individual-Cylinder Knock Occurrence and Intensity in Multicylinder Engines,” Society of Automotive Engineers, Paper 820074 February 1982
- Quader Ather A. “Lean Combustion and Misfire Limit in Spark Ignition Engines,” Research Report GMR 1697 October 1974
- Tanka Munenobu Sato Tadanori Takasaki Masatomo “Metanoru Kongo Nenryo No Hibana Tenka Kikan No Nensho Ni Ataeru Eikyo,” Nainen Kikan (Internal Combustion Engine) 23 297 1984 9 20
- Bolt J. A. Holkeboer D. H. “Lean Fuel/Air Mixtures for High Compression Spark Ignition Engines,” SAE Transactions 70 paper 380-D 1962
- Hilden D. L. Parks F. B. “A Single-Cylinder Engine Study of Methanol Fuel-Emphasis on Organic Emissions” SAE Paper 760378 February 1976
- Patel K. S. Henein N. A.