What is the Anti-Knock Property of Gasoline?

[BradyDella]

Gasoline's anti-knock property refers to its ability to resist knocking during combustion in an engine, which is a primary indicator of gasoline's combustion performance. A strong anti-knock property allows for the use of higher compression ratio engines, effectively increasing engine power, reducing fuel consumption, and improving engine economy. The causes of gasoline knocking include: 1. The collision between unburned fuel-air mixture in the combustion chamber and the normally burning flame leading to gasoline knocking; 2. Excessive engine carbon deposits increasing the compression ratio and causing gasoline knocking; 3. High engine temperature or poor engine cooling water circulation leading to engine overheating and gasoline knocking.