Fireball high compression ratio combustion chamber
The main part of the combustion chamber is located below the concave exhaust valve of the cylinder head. The diameter is small, the structure is compact, and there is a certain squeezing surface, which can form a strong squeezing turbulence. At the same time, the shallow groove of the intake valve is connected to the main combustion chamber by a shallow groove. The advantage is that it can burn very thin mixture gas, and the air-fuel ratio can reach 26, which reduces the fuel consumption rate. The disadvantage is that high-octane gasoline must be used, which is sensitive to carbon deposits, and the compression ratio needs to be strictly controlled.