Air Intake Systems
The air intake system is critical to the function of the engine, collecting air and directing it to individual cylinders
Located directly behind the front grille, the air intake system draws air through a long plastic tube going into the air filter housing, which will be mixed with the car fuel. Only then will the air be sent to the intake manifold that supplies the fuel/air mixture to the engine cylinders
When the piston descends in the cylinder, it creates a vacuum or low-pressure area in the cylinder. When the intake valve opens, we now have a pressure differential between the vacuum in the cylinder and the atmospheric pressure outside. This pressure differential causes the air to flow into the cylinder to equalise this imbalance. The larger this pressure differential, the more inclined the air will be to flow into the cylinder, resulting in a better cylinder fill and the potential for more power. This is the exact principle that superchargers work on
Before the air gets a chance to make its way into the cylinder, it covers a pretty long path through the intake system. This includes, as mentioned above, the airbox, air filter, airflow meter, intake plumbing, and finally the throttle body. If we want to get even more accurate, it also must flow through the intake manifold, the intake ports in the heads, and finally past the intake valve.
Depending on the vehicle, these parts may be in a different order.