What allows fuel and air into combustion chamber?

Fuel and air enter the combustion chamber through the intake system of an internal combustion engine. This system typically includes the throttle body, which regulates the flow of air, and fuel injectors or a carburetor, which mix the appropriate amount of fuel with the incoming air. The engine's pistons create a vacuum during the intake stroke, drawing the air-fuel mixture into the combustion chamber for ignition. Proper timing and control of this process are essential for efficient engine performance.