This content is not included in your SAE MOBILUS subscription, or you are not logged in.
An Engine's Definition of Unleaded Gasoline
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1971 by SAE International in United States
Annotation ability available
With unleaded and low-lead gasolines being introduced into the marketplace in increased numbers, definition of what is meant by the terms unleaded and low-lead is becoming important. What quantity of lead can a gasoline contain before effects normally associated with the use of gasolines leaded to current levels are encountered?
An engine program designed to investigate the effect of varying gasoline lead levels upon changes in hydrocarbon exhaust emissions levels resulting from combustion chamber deposits and valve recession was extended to very low lead levels. The results of this program define the amount of lead a fuel may contain before lead deposit effects on emissions are observed and valve recession problems are eliminated as falling between 0.04-0.07 gm/gal.
The usefulness of these parameters to define unleaded gasoline is discussed, together with other parameters that must also be investigated before a complete definition of unleaded gasoline can be established.
|Technical Paper||Role of Lead Antiknocks in Modern Gasolines|
|Technical Paper||Valve Seat Recession and Protection Due to Lead Phase Out in Thailand|
|Technical Paper||Correlations of Laminar Combustion Data for Alternative S.I. Engine Fuels|
CitationDoelling, R., "An Engine's Definition of Unleaded Gasoline," SAE Technical Paper 710841, 1971, https://doi.org/10.4271/710841.
- Kehoe R. A. “Toxicological Appraisal of Lead.” Air Pollution Control Assoc. Paper 69-145 1969
- Goldsmith J. R. “Epidemiological Bases for Possible Air Quality Criteria for Lead.” Air Pollution Control Assoc. Paper 69-146B 1969
- Gagliardi J. C. “The Effect of Fuel Anti-Knock Compounds and Deposits on Exhaust Emissions.” Paper 670128 SAE Automotive Engineering Congress Detroit January 1967
- Doelling R. P. Gerber A. F. Walsh M. P. “Effect of Gasoline Characteristics on Automotive Exhaust Emissions.” Effect of Automotive Emission Requirements on Gasoline Characteristics American Society for Testing and Materials 1971 20 35
- “Automotive Fuels and Air Pollution.” Report of the Panel on Automotive Fuels and Air Pollution to the Commerce Technical Advisory Board U. S. Department of Commerce March 1971
- Hofer L. J. Schultz J. F. Feenan J. J. “Effect of Lead Deposits on Activity of Automotive Exhaust Catalysts.” Bureau of Mines Report of Investigations 6243
- Weaver E. E. “Effects of Tetraethyl Lead on Catalyst Life and Efficiency in Customer Type Vehicle Operation.” SAE Transactions 78 1969 paper 690016
- Cole E. N. General Session During the 1970 Annual Meeting of the American Petroleum Institute New York November 1970
- “Gasoline, Automotive, Low Leaded or Unleaded.” Interim Federal Specification VV-G-001690 July 9 1971
- Dumont L. F. “Possible Mechanisms by which Combustion-Chamber Deposits Accumulate and Influence Knock.” SAE Quarterly Transactions 5 1951 565 576
- Duckworth J. B. “Effects of Combustion-Chamber Deposits on Octane Requirement and Engine Power Output.” SAE Quarterly Transactions 5 1951 577 581
- Mikita J. J. Sturgis B. M. “The Chemistry of Combustion Chamber Deposits.” Proceedings of the 4th World Petroleum Congress Paper 1
- Warren J. “Combustion-Chamber Deposits and Octane-Number Requirement.” Paper 235 SAE Automotive Engineering Congress Detroit January 1954
- Gibson H. J. Hall C. A. Huffman A. E. “Combustion Chamber Deposition and Power Loss.” Paper 727 SAE Automotive Engineering Congress Detroit January 1952