Timing advance is required because it takes time to burn the air-fuel mixture.

The leaner the air-fuel mixture, the higher the combustion temperature is inside the cylinder.

The power stroke begins after the air-fuel mixture is ignited.

A carburetor is used to provide the air-fuel mixture.

The idea was electronic control of the air-fuel mixture with precision and efficiency.

Normally, the air-fuel mixture in the empty space in the fuel tank changes with the altitude.

This, in turn, ignites the compressed air-fuel mixture within the engine.

When the air is compressed, you get a more powerful explosion from the air-fuel mixture, and more of the fuel gets used.

The cylinder is filled with air or with an air-fuel mixture.

Typically, the more air-fuel mixture an engine burns, the more power it produces.