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Advantages of Turbochargers

In turbochargers the exhaust gas energy which would normally be wasted is used to drive a turbine, which in turn drives a compressor to deliver compressed air to the engine.

The advantages of a turbocharged engine are:

lower fuel consumption

lower emissions

better torque characteristics

lower weight and smaller engine package

lower engine noise

How a Turbocharger Works

The turbine housing is bolted to the exhaust manifold of the engine.

The waste exhaust gasses are used to rotate the turbine wheel which is housed in the turbine casing.

Turbine temperatures up to 760 deg C

The turbine wheel is connected to a common shaft which in turn rotates a compressor wheel.

 

As more gas is passed through the turbine housing, the faster the turbine wheel rotates.

As the turbine wheel increases in speed, so does the compressor wheel. This creates a sucking process and pulls air into the compressor cover from the atmosphere (filtered).

The faster the wheels spin the, the more air is sucked in.

 

As the air is sucked into the compressor cover, it is forced through a diffuser area.

This compresses the air and forces it into the engine

This process causes the air to increase in temperature, up to 200 degrees C 

The oil used in a turbocharger is the same as that used for your engine.

 

The oil is used as both a lubricant and a coolant.

The oil is fed under pressure into the bearing housing, through the journal bearings and thrust system.