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Effect of Octane Number on the Performance of Euro 5 and Euro 6 Gasoline Passenger Cars
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 28, 2017 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Research Octane Number (RON) and Motor Octane Number (MON) are used to describe gasoline combustion which describe antiknock performance under different conditions. Recent literature suggests that MON is less important than RON in modern cars and a relaxation in the MON specification could improve vehicle performance. At the same time, for the same octane number change, increasing RON appears to provide more benefit to engine power and acceleration than reducing MON. Some workers have advocated the use of an octane index (OI) which incorporates both parameters instead of either RON or MON to give an indication of gasoline knock resistance. Previous Concawe work investigated the effect of RON and MON on the power and acceleration performance of two Euro 4 gasoline passenger cars during an especially-designed acceleration test cycle. A large number of fuels blended with and without oxygenates and ranging from around 95 to 103 RON and sensitivities (RON minus MON) up to around 15 were tested. The results were vehicle dependent but in general, showed that sensitivity and octane index appear to be better predictors for improved acceleration times versus either RON or MON alone. In the current study a wider range of newer vehicles (Euro 5+) have been screened on a more limited fuel set and several chosen for further evaluation on the full fuel set. Improvements in fuel efficiency were observed during this testing and additional testing using standardized test cycles was carried out on one vehicle.
- Carole A. Bontoft - ExxonMobil Research and Engineering Co.
- Andreas Kolbeck - Shell Global Solutions
- John Williams - BP International Ltd.
- Heather D. Hamje - Concawe
- David J. Rickeard - Concawe
- Kalle Lehto - Neste
- Walter Mirabella - Lyondell Basell
- Elena Rebesco - ENI SPA
- Maria Dolores Cardenas - REPSOL SA
CitationWilliams, J., Hamje, H., Rickeard, D., Kolbeck, A. et al., "Effect of Octane Number on the Performance of Euro 5 and Euro 6 Gasoline Passenger Cars," SAE Technical Paper 2017-01-0811, 2017, https://doi.org/10.4271/2017-01-0811.
Data Sets - Support Documents
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