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octane number
(redirected from octane ratings)

    Also found in: Encyclopedia 0.01 sec.
octane number
n.
A numerical representation of the antiknock properties of motor fuel, compared with a standard reference fuel, such as isooctane, which has an octane number of 100. Also called octane rating.
octane number, rating
n
(Chemistry) a measure of the quality of a petrol expressed as the percentage of isooctane in a mixture of isooctane and n-heptane that gives a fuel with the same antiknock qualities as the given petrol
octane number
A numerical representation of the ability of a fuel to resist knocking when ignited in the cylinder of an internal-combustion engine. The octane number of a given fuel is determined by comparing the amount of knocking that fuel causes when combusted with the amount of knocking caused by two standard reference fuels, isooctane (which resists knocking and has an octane number of 100) and heptane (which causes knocking and has an octane number of 0). The octane number is then assigned as the percentage of isooctane required in a blend with normal heptane to match the knocking behavior of the fuel being tested.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.octane number - a measure of the antiknock properties of gasoline
octane rating
quantity, measure, amount - how much there is or how many there are of something that you can quantify
Translations
octane number, octane rating
n → Oktanzahl f
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This works in much the same fashion as do the octane ratings on gasoline.
What's the Best Fuel for Refillable Lighters? by Dave Sabot / Consumer news, advice, product reviews community
The major problems in this case was to get sufficient fuel octane ratings to prevent excessive detonation , or knock , to prevent excessive detonation, Detonation of course is a sudden , uncontrolled explosion of the last part of the gas-oil mixture.
Hot Fuels for Fast Cars by Franklin R. West / Automotive community
Car mechanics agree that fuels with higher octane ratings burn less easily, yet they recommend them highly since these fuels are generally considered more powerful.
Unleaded fuel: Luxury or necessity? by The Star (Amman, Jordan)
 
 
 
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