2.2.17. Turbo charger The exhaust gases of the engine are passed through the turbine rotor of the turbo charger Air impeller The turbo charger is air-cooled. Lubrication of the main bearing is by oil under Pressure from the mounted on the same shaft draws in fresh air and delivers it at a higher pressure to the cylinders. engine lubricating system. D 1 3 2 5 A B E 4 C EA6O3004 1. Compressor casing A. Air inlet 2. Turbine casing B. Gas outlet 3. Compressor wheel C. Gas inlet 4. Impeller D. Oil supply 5. Turbine E. Oil return Technical Information - 30 -