Turbocharging, function

P09.00-2067-76

107 Exhaust manifold

110 Turbocharger

110/1 Charge air pipe

110/2 Charge air cooler

110/3 Mixing tube (exhaust gas and fresh air)

110/4 Charge air distribution pipe

B5/1 Charge pressure sensor

B17/8 Charge air temperature sensor

Y100/1 Right charge pressure positioner

The cylinder charge efficiency is improved as a result of charging. As a result the engine torque and power output are boosted.

For charging, the flow energy of the exhaust gases are used to drive the turbocharger.

The turbocharger draws in fresh air at the compressor inlet and passes this via the compressor outlet and the charge air pipe to the charge air cooler.

The high speed of the compressor turbine wheel and the resultant high volume flow compresses the air in the charge air pipe.

The charge air cooler then cools down the charge air heated by compression and passes the air on via the charge air pipe and the mixing tube to the charge air distribution pipe. From the charge air distribution pipe, the charge air is then passed to the individual intake ports.

The boost pressure positioner adjusts the guide vanes in the turbocharger and thus regulates the boost pressure (volume flow).

The boost pressure is detected by the boost pressure sensor and the charge air temperature by the charge air temperature sensor and transmitted to the CDI control unit (N3/9) as voltage signals.