octane number
noun Date: 1931 a number that is used to measure the antiknock properties of a liquid motor fuel (as gasoline) with a higher number indicating a smaller likelihood of knocking — called also octane rating — compare cetane number

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • octane number — ☆ octane number or octane rating n. a number representing the antiknock properties of a gasoline, fuel mixture, etc., determined by the percentage of isooctane that must be mixed with normal heptane to produce the knocking quality of the fuel… …   English World dictionary

  • octane number —    or octane rating    a measure used to express the ability of gasoline to reduce engine knocking. Gasoline is a complex mixture of hydrocarbons: compounds containing hydrogen and carbon. Beginning chemistry students learn that octane is the… …   Dictionary of units of measurement

  • octane number — Every brand of gasoline has an octane rating or number which indicates its ability to resist knocking. When the numbers were first developed, the researchers found that normal heptane (a hydrocarbon) had almost no ability to resist knocking so… …   Dictionary of automotive terms

  • octane number — (of gasoline) a designation of antiknock quality, numerically equal to the percentage of isooctane by volume in a mixture of isooctane and normal heptane that matches the given gasoline in antiknock characteristics. Also called octane rating.… …   Universalium

  • octane number — 1. A measure of petrol s resistance to pre ignition or pinking , which is the sound made by an engine when pre ignition occurs, particularly at low revs and high load. Two measures are used, for low speed and high speed pre ignition. ULSP in the… …   Petroleum refining glossary

  • octane number — oktaninis skaičius statusas T sritis Standartizacija ir metrologija apibrėžtis Benzino antidetonacinių savybių rodiklis. atitikmenys: angl. octane number vok. Oktanzahl, f rus. октановое число, n pranc. indice d’octane, m; nombre d’octane, m …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • octane number — oktaninis skaičius statusas T sritis Standartizacija ir metrologija apibrėžtis Sutartinės skalės skaičius, reiškiantis degalų, skirtų benzininiams varikliams, atsparumą detonacijai. atitikmenys: angl. octane number vok. Oktanzahl, f rus.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • octane number — noun a measure of the antiknock properties of an automobile fuel; isooctane having an octane number of 100, a fuel with the same antiknock properties as a mixture of 90% isooctane and 10% heptane having an octane number of 90 …   Wiktionary

  • octane number — oktaninis skaičius statusas T sritis Energetika apibrėžtis Skaičius, apibūdinantis benzino ar žibalo detonacinį atsparumą. Pastarasis lyginamas su etaloninio mišinio, sudaryto iš izooktano C₈H₁₈ ir heksano C₇H₁₆, detonaciniu atsparumu. Izooktanas …   Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas

  • octane number — oktaninis skaičius statusas T sritis chemija apibrėžtis Benzino antidetonacinių savybių rodiklis. atitikmenys: angl. octane number rus. октановое число …   Chemijos terminų aiškinamasis žodynas

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