What is the octane number

Octane number (octane number) is a measure ofcarAn indicator of the anti-knock resistance of the fuel (gasoline).Gasoline contains a lot of hydrocarbons, among which n-heptane is more likely to cause spontaneous combustion under high temperature and high pressure, causing explosions, reducing engine efficiency, and more likely to cause overheating of the cylinder wall or evenpistonCracked.What is the octane number,Therefore, the octane number of n-heptane is set to zero. The detonation of isooctane is very small, and its octane number is set to 100. Other hydrocarbons also have different octane numbers, which may be less than 0 (such as n-octane) or greater than 100 (such as toluene). Therefore, the octane number of gasoline directly determines the proportion of hydrocarbons in gasoline.

The octane rating is a measure ofCarburetorAn important indicator of the explosion-proof performance of engine fuel has been included in the first item of the technical requirements for automotive gasoline. The higher the gasoline octane number, the better the knock resistance. The engine can adopt a higher compression ratio, which can increase engine power and save fuel. It is of great significance to improve the fuel economy of gasoline engines.