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Improved Fuel Economy by Better Utilization of Available Octane Quality
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English
Abstract
The spread of octane requirements due to tolerances in engine manufacture has been investigated to indicate the potential improvement in fuel economy which could be achieved by making better use of the available gasoline octane quality.
The wide spread of octane requirements in the 48 cars studied resulted in “octane waste”, a measure of the inefficient use by engines of the available octane quality. The average waste was three octane numbers and is associated with variations in compression ratio. The wasted octane can be made available to improve fuel economy through tighter control of manufacturing tolerances on combustion chamber volumes.
Authors
Citation
Betts, W., "Improved Fuel Economy by Better Utilization of Available Octane Quality," SAE Technical Paper 790940, 1979, https://doi.org/10.4271/790940.Also In
References
- The Rational Use of Energy in Transportation - Interpretation and Integration of the findings of the CCMC and CONCAWE” Coordinating European Council for the development of Performance Tests for lubricants and Engine Fuels December 1978
- “1977 Co-operative Road Octane Requirement Data determined under Accelerating Conditions of Test” CORC (Co-operative Octane Requirement Committee) 1978
- “Black Spot” a special report on the findings of the 1970 Safety through performance programme Champion Sparking Plug Co. England 1971
- “Engine-Fuel Matching” Report on the Experimental Programme Committee of Common Market Automobile Constructeurs (CCMC) Study on the Rational Use of Energy March 1977