Turbocharging, function - GF09.00-P-2000KE

ENGINE 271.921 in MODEL 203

ENGINE 271.940 in MODEL 203, 209

ENGINE 271.941 in MODEL 211

ENGINE 271.944 in MODEL 171

ENGINE 271.946 in MODEL 203

ENGINE 271.948 in MODEL 203

ENGINE 271.955 in MODEL 209

ENGINE 271.956 in MODEL 211

Fig 1: Identifying Turbocharging Function - Engine 271.948

Maximum boost pressure

Fig 2: Identifying Maximum Boost Pressure

The compressor is permanently driven by the crankshaft via a poly-V-belt. The charge pressure is controlled by the recirculated air flap actuator which is located at the intake/recirculated air opening of the supercharger. If the recirculated air flap is closed, full boost pressure is available to the engine. The recirculated air flap is always closed at full load.

Controlled boost pressure

Fig 3: Identifying Controlled Boost Pressure

If the recirculated air flap is open, the boost pressure air is guided back via the recirculated air line to the supercharger. The recirculated air flap can be adjusted variably from 0 to 90° and can thus regulate the boost pressure via the air recirculation line.

Charge air cooler, description of components	110/2	GF09.41-P-5000KE
Supercharger, description of components	50	GF09.50-P-2000KE
Component description of air recirculation flap actuator	M16/7	GF09.50-P-2100KE