This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Measurement of Octane Numbers for Methanol and Reference Fuels Blends
Annotation ability available
Sector:
Language:
English
Abstract
The purpose of this work was to develop a series of octane reference fuels for road testing methanol fueled vehicles. Preliminary attempts to measure the research octane number of neat methanol by the standard ASTM test procedure produced anomalous results. This led to a more basic method of measuring the octane number based on the incipient knock compression ratio. The incipient knock method gave research and motor octane numbers of 112 and 88, respectively, for neat methanol. Research octane numbers of several methanol reference fuel blends prepared by adding octane enhancers and depressors were determined. The effects of spark timing and air/fuel mixture temperature on the incipient knock compression ratio of neat methanol were also examined.
Recommended Content
Authors
Citation
Naegeli, D., Yost, D., Moulton, D., Owens, E. et al., "The Measurement of Octane Numbers for Methanol and Reference Fuels Blends," SAE Technical Paper 892038, 1989, https://doi.org/10.4271/892038.Also In
References
- American Petroleum Institute, Committee for Air Water Conservation, “Use of Alcohol in Motor Gasoline - A Review,” Report No. 4082 1971
- Unzelman G.J. et al. “Are There Substitutes for Lead Antiknocks?” API Proceedings 889 1971
- Most W.J. Longwell J.P. “Single Cylinder Engine Evaluation of Methanol-Improved Economy and Reduced NO x ,” SAE Paper 750119 1975
- Johnson R.T. Riley R.K. “Evaluation of Methyl Alcohol as a Vehicle Fuel Extender,” Final Report, (1975), Contract No. DOT-05-40104, work done in the Mechanical Engineering Department University of Missouri Rolla, MO
- Hunwartzen I. “Modification of CFR Test Engine Unit to Determine Octane Numbers of Pure Alcohols and Gasoline - Alcohol Blends,” SAE Paper 820002 1982
- Bauer K. Heilmann G. Koepcke G. Reders K. Erwig W. Hunwartzen I. Moeller P. Starke K. “Determination of Anti-knock Performance (RON and MON) of Alcohols and Alcohol-Gasoline Blends in CFR Test Engines,” Project Coordination, DGMK (Deutaehe Gesellschaft f. mineralwissenschaft und kohlichemie e.V.) - Special Branch, Research Report 260-01 224 Nordhanalstrasse 28 2000 Hamberg September 1981
- “ASTM Manual for Rating Motor, Diesel and Aviation Fuels,”
- Balasubramanian V. Gopalahrishman K.V. Murthy B.S. “Development and Performance Testing of A Surface Ignition Engine to Operate on Alcohols,”
- Bawditch F.W. Yu T.C. “A Consideration of the Deposit Ignition Mechanism,” SAE Transactions 1960
- Menrad H. Haselhorst M. Erwig W. “Pre-Ignition and Knock Behavior of Alcohol Fuels,” SAE Paper 821210 1982
- Obert E.F. “Detonation and Internal Coolants,” SAE Quarterly Transactions 2 (1) 52 1948
- Anzilotti W.F. Tamsic V.J. “Combustion of Hydrogen and Carbon Monoxide as Related to Knock,” 4th Symposium (International) on Combustion 356 1963
- Steinback O.F. King C.V. “Experiments in Physical Chemistry,” 56 Copyright, 1950, by American Book Company
- Pritchard H.O. “Thermal Decomposition of Isooctyl Nitrate,” Combustion and Flame 75 415 1989
- Handbook of Chemistry and Physics, 39th ed. 1074 1134 1958
- Ryan T.W. Lestz S.S. “The Laminar Burning Velocity of Isooctane, N-Heptane, Methanol, Methane, and Propane at Elevated Temperature and Pressures in the Presence of a Diluent,” SAE Paper 800103