Which component increases the density of intake air for greater engine efficiency?

The component that increases the density of intake air for greater engine efficiency is the turbocharger. A turbocharger works by compressing the incoming air, which increases its density. This allows more air—and therefore more oxygen—to enter the engine’s cylinders, enabling better combustion. This process enhances the overall efficiency and power output of the engine, making it capable of generating more power from the same amount of fuel.

While an intercooler is also important for engine performance, its primary function is to cool the compressed air coming from the turbocharger before it enters the engine. Cooling the air increases its density further, but it does not compress the air to increase its density like a turbocharger does.

The exhaust manifold is responsible for directing exhaust gases away from the engine, while the intake manifold distributes the air-fuel mixture to the cylinders. Neither of these components directly increases the density of the intake air in the same way that a turbocharger does.

In summary, a turbocharger compresses the intake air itself, thereby enhancing engine efficiency by maximizing the air available for combustion.