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ROAD ANTIKNOCK PERFORMANCE AND THE BOILING RANGE OF HYDROCARBON TYPES
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Abstract
Two gasolines may have the same Research octane number, the same Motor octane number, and the same over-all hydrocarbon composition yet differ significantly in road antiknock performance. This paper concludes that such variation can be related to the placement of hydrocarbon types in the boiling range of the gasolines. Specifically, studies show that the low-boiling olefins provided better road performance than did the high-boiling olefins. Also, low-boiling aromatics gave better road ratings than the high-boiling aromatics. The magnitude of these effects varied with vehicle engine speed.
For this study, twenty fuels of nominal 100 Research octane number were designed on a statistical basis. Realistic gasoline components were used. Comprehensive laboratory inspections of the fuels and fractions included more than 700 laboratory antiknock ratings, 400 hydrocarbon type analyses, and complete volatility data.
Road-performance characteristics were appraised in three recent-production automobiles and three cars having experimental engines of 11-to-1 compression ratio. More than 1000 road ratings were made. Statistical correlations of these data provide a basis for the conclusions reported herein.
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BUERSTETTA, F., HEALY, W., McREYNOLDS, L., ROHDE, R. et al., "ROAD ANTIKNOCK PERFORMANCE AND THE BOILING RANGE OF HYDROCARBON TYPES," SAE Technical Paper 580394, 1958, https://doi.org/10.4271/580394.Also In
References
- Veal C. B. Best H. W. Campbell J. M. Holiday W. M. “Antiknock Research Coordinates Laboratory and Road Tests” S.A.E. Transactions 32, 105-120, 104, 187 1933
- Campbell J. M. Withrow L. L. “Engines and Fuels for Higher Efficiency” Presented at Natural Gasoline Association of America Meeting Fort Worth, Texas March 1948
- Watson F. R. Caudel F. H. Heldman J. D. “A Proposed Road Octane Number” Presented at S.A.E. National Fuels and Lubricants Meeting Tulsa, Oklahoma November 1948
- Risk T. H. “Factors Affecting the Antiknock Performance of Post-War Fuels,” S.A.E. Transactions 54 93 94 1944
- Buerstetta F. D. Warren T. W. “Octane Possibilities with C 7 -C 8 Hydrocarbons” Presented at California Natural Gasoline Association Meeting Los Angeles, California October 1955
- Esau N. D. Wagner T. O. Bailie J. D. Buerstetta F. D. “Octanes, Olefins, and Road Performance” Presented at Western Petroleum Refiners Association Annual Meeting San Antonio, Texas March 1957
- Morris W. E. “Correlations Between Road Octanes, Laboratory Octanes, and Hydrocarbon Type” Presented at S.A.E. National Fuels and Lubricants Meeting Cleveland, Ohio November 1957
- Meyer W. P. A. Goldthwait R. G. “Effect of Hydrocarbon Type and Distribution in the Boiling Range on Road Antiknock Performance” Presented at S.A.E. National Fuels and Lubricants Meeting Cleveland, Ohio November 1957
- Warren T. W. Toulmin H. A. Retzloff J. B. Hall C. A. “Matching Gasoline Antiknock Performance and Future Engines” Presented at a Meeting of the Division of Refining American Petroleum Institute Philadelphia, Pennsylvania May 1957