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Definition of octane number in English: octane number(also octane rating) noun A figure indicating the anti-knock properties of a fuel, based on a comparison with a mixture of isooctane and heptane. Example sentencesExamples - Using a fuel of a higher octane rating than that recommended for your car doesn't improve its performance.
- The higher the octane number you see on a gas pump, the more the fuel can be compressed before it explodes.
- However, ethanol has a good octane rating of around 112 and a high heat-off evaporation so it cools down the intake charge.
- In particular, the formation of branched alkanes increases the octane number and combustibility of the resulting hydrocarbon.
- Pyrolysis oil can also be added to gasoline to increase its octane rating.
Definition of octane number in US English: octane number(also octane rating) nounˈäkˌtān ˌnəmbər A figure indicating the antiknock properties of a fuel, based on a comparison with a mixture of isooctane and heptane. Example sentencesExamples - However, ethanol has a good octane rating of around 112 and a high heat-off evaporation so it cools down the intake charge.
- The higher the octane number you see on a gas pump, the more the fuel can be compressed before it explodes.
- In particular, the formation of branched alkanes increases the octane number and combustibility of the resulting hydrocarbon.
- Using a fuel of a higher octane rating than that recommended for your car doesn't improve its performance.
- Pyrolysis oil can also be added to gasoline to increase its octane rating.
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