When to Use purpose of turbocharger？

This improvement over a naturally aspirated engine&#;s power output is due to the fact that the compressor can force more air&#;and proportionately more fuel&#;into the combustion chamber than atmospheric pressure alone.

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In naturally aspirated piston engines, intake gases are &#;pushed&#; into the engine by atmospheric pressure filling the volumetric void caused by the downward stroke of the piston (which creates a low-pressure area), similar to how liquid is drawn up into a syringe.

The objective of a turbocharger is to improve an engine&#;s efficiency by increasing the density of the intake gas (usually air), thereby allowing more power per engine cycle.

The turbocharger&#;s compressor draws in ambient air and compresses it before it enters into the intake manifold at increased pressure. This results in a greater mass of air entering the cylinders on each intake stroke. The power needed to spin the centrifugal compressor is derived from the kinetic energy of the engine&#;s exhaust gases.

A turbocharger may also be used to increase fuel efficiency without increasing power. This is achieved by recovering waste energy in the exhaust and feeding it back into the engine intake. By using this otherwise wasted energy to increase the mass of air, it becomes easier to ensure that all fuel is burned before being vented at the start of the exhaust stage.

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A turbocharger is a device fitted to a vehicle&#;s engine that is designed to improve the overall efficiency and increase performance. This is the reason why many auto manufacturers are choosing to turbocharge their vehicles. The new Chevrolet Trax and Equinox are both offered with turbocharged engines and as time goes on, more and more vehicles will be fitted with them.

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How does it work?

A turbo is made up of two halves joined together by a shaft. On one side, hot exhaust gasses spin the turbine that is connected to another turbine which sucks air in and compresses it into the engine. This compression is what gives the engine the extra power and efficiency because as more air can go in the combustion chamber, more fuel can be added for more power.

Advantages

In addition to the extra power, turbochargers are sometimes referred to as devices that offer &#;free power&#; because unlike a supercharger, it does not require the engine&#;s power to drive it. The hot and expanding gasses coming out of the engine are what power a turbocharger so there is no drain of the engine&#;s net power. Turbocharged engines are also not affected in the same way as naturally aspirated engines are when they go at higher altitudes. The higher in altitude a naturally aspirated engine climbs, the harder it becomes for it to get oxygen due to the thinning atmosphere. A turbocharger gets around this problem because it forces the oxygen into the engine&#;s combustion chamber, sometimes at 2 times the pressure of the atmosphere.

Turbochargers also improve the fuel efficiency of a vehicle however there is a misconception when it comes to turbocharged vehicles and fuel efficiency. Taking a naturally aspirated engine and slapping on a turbocharger on it will not improve fuel efficiency. The way that manufacturers improve fuel efficiency though turbocharging is by down-sizing an engine and then turbocharging it. For example, take a 2.5L inline-4 cylinder naturally aspirated engine and decrease the displacement to 1.4L and then turbocharger it. The smaller, turbocharged engine would still have the same performance figures (or slightly better) but because of the smaller displacement, it would also use less fuel.

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