How does an internally driven supercharger increase air pressure in the fuel/air mixture?

An internally driven supercharger increases air pressure in the fuel/air mixture primarily through the action of an impeller that compresses the air after it leaves the carburetor. This process involves the supercharger drawing in ambient air and utilizing its mechanical design to increase the density of this air. As the impeller spins, it compresses the air, resulting in a higher pressure mixture that is then directed into the engine cylinders.

This compression is crucial because it helps to deliver a greater volume of air into the combustion chamber, allowing for more fuel to be burnt and improving the overall efficiency and power output of the engine. The action of the supercharger directly enhances the engine's performance, especially at altitude where the air is thinner, making it particularly effective in applications where additional power is needed for climb and acceleration.

The other options focus on different mechanisms that do not accurately describe the function of an internally driven supercharger. For instance, compressing the mixture before carburetion does not represent how a supercharger typically operates in conjunction with a carburetor. Turbines are associated with turbochargers, not superchargers. Lastly, while cooling incoming air can assist in performance, it does not define the primary operation method of an internally driven super