iso-octane
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iso-octane — A paraffin hydrocarbon fuel, defined as 2,2,4 trimethylpentane, which is used as a standard in the rating of fuels. This knock quality of fuel is expressed as a percentage by volume of iso octane in a mixture with normal heptane that has the same … Aviation dictionary
iso-octane — Liquid hydrocarbon used to determine the octane rating of fuels; (see also octane number) … Dictionary of automotive terms
iso-octane — /aɪsoʊ ˈɒkteɪn/ (say uysoh oktayn) noun an isomer of octane used to determine the knocking qualities of a fuel …
Octane rating — or octane number is a standard measure of the anti knock properties (i.e. the performance) of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand before detonating. In broad terms, fuels with a… … Wikipedia
OCTANE (INDICE D’) — OCTANE INDICE D’ L’indice d’octane caractérise la résistance au cliquetis d’un carburant utilisé dans les moteurs classiques à allumage par étincelle. Le cliquetis est un phénomène parasite dû à une auto inflammation d’une partie du mélange air… … Encyclopédie Universelle
octane — [ ɔktan ] n. m. • 1874; de oct et suff. ane ♦ Chim. Hydrocarbure saturé (C8H18) de la série des paraffines, à nombreux isomères (⇒ isooctane). Cour. Indice d octane : échelle conventionnelle caractérisant le pouvoir antidétonant d un carburant. ● … Encyclopédie Universelle
iso — iso·abnormal; iso·agglutination; iso·agglutinin; iso·agglutinogen; iso·allele; iso·alloxazine; iso·amyl; iso·amylene; iso·antibody; iso·antigen; iso·bar; iso·barbaloin; iso·bar·ic; iso·barometric; iso·base; iso·bathy·therm; iso·bilateral;… … English syllables
Octane — [zu lateinisch octo »acht«], Singular Octan das, s, flüssige Kohlenwasserstoffe aus der Gruppe der Alkane mit der Summenformel C8H18. Neben dem geradkettigen n Octan existieren 17 Isomere mit verzweigten Kohlenstoffketten (Isooctane) … Universal-Lexikon
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 — (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
