54
Superior
Technology
Exhaust turbocharging
MSSP_001_051
Fundamental principle of exhaust
turbocharging
The aims of supercharging by means of
a turbocharger are:
• Higher torque and
• Increased engine output
By compressing the intake air, more air and thus
increased levels of oxygen enter the combustion
chamber with each intake stroke. The higher
share of oxygen enables improved combustion.
The power output is increased.
The movement and pressure energy contained in
the exhaust gas is used to drive the turbine wheel
of the turbocharger that is connected via a shaft
to the compressor wheel.
The compressor wheel compresses the air and
forces it into the combustion chamber. Since the
air temperature increases during compression
and the density thus decreases, the engine output
can be further increased by cooling the air in an
intercooler. The air density increases again.
Compressor
Exhaust turbine
Intercooler
Heat
The compressed, heated
air is routed to the
intercooler.
Exhaust gas from the engine
drives the exhaust turbine.
Exhaust
Air inlet
Summary of Contents for SDI 55-5
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