1)
As the engine is running, exhaust gases need to leave the
engine; one end of the turbocharger is connected to the
exhaust manifold where the impellers are being turned by
the escaping waste gas
2) Now that the impellers
are turning due to the waste gas, the side of the
turbocharger that is connected directly to the air intake
will start compressing air, which comes through the
compressor inlet.
3) The compressed air that comes from
the compressor will be very hot due to the high pressure;
most car engines setups that use a turbocharger will also
use something known as a "intercooler". The job of
the intercooler is to cool down the intake air make it
more feasible for the engine to use.
4) The engine the goes through
its normal combustion cycle; in this case however, the
engine will be burning fuel a lot more effectively
allowing the engine to produce more power and be more
efficient than just being naturally aspirated
(non-turbocharged).