octane rating/number

An indicator of a fuel's ability to burn at a controlled rate at high temperatures and pressures without causing a detonation (very rapid burning or exploding). This number is expressed as a percentage by volume of iso-octane in a mixture with a normal heptane that has the same knocking characteristics as the fuel. Fuel with an 87 octane rating is a mixture of 87% iso-octane and 13% heptane. Also called the knock rating or the performance number when the octane rating is above 100.

单词	octanes
释义	DictionarySeeoctane octane rating/number octane rating/number An indicator of a fuel's ability to burn at a controlled rate at high temperatures and pressures without causing a detonation (very rapid burning or exploding). This number is expressed as a percentage by volume of iso-octane in a mixture with a normal heptane that has the same knocking characteristics as the fuel. Fuel with an 87 octane rating is a mixture of 87% iso-octane and 13% heptane. Also called the knock rating or the performance number when the octane rating is above 100.
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