In a gasoline internal combustion engine, a certain proportion of oil and gas mixture enters the cylinder. It is compressed by the piston and ignited by the spark plug. The deflagration causes the piston to do work.
The ratio of oil-gas mixture in the cylinder should be within the hardtop range. Anything more or less will affect the success of the detonation. If the damper is wide open and the proportion of air increases, the gasoline engine will inevitably not operate properly.