Air supply
Combustion
29
Introduction of New Generation of 4-Cylinder Inline Engines, OM 651
q
Air ducting
The hot film mass air flow sensor (HFM) is located in
the clean air line downstream of the air filter housing.
It determines the mass and temperature of the intake
air and makes the measurement results available to
the motor electronics as input factors.
The low-pressure turbocharger draws in clean air
through the clean air line and air filter and compresses
it. The air
compressed by the turbochargers flows
through the charge air cooler where it is cooled.
The throttle valve actuator influences the air volume
fed to the engine and the
mixing ratio of charge air and
recirculated exhaust gas mixed in downstream of the
throttle valve. The air mixture is then fed directly to the
combustion chamber via the charge air manifold.
Air ducting
1 Air filter housing
2 Throttle valve
3 Charge air manifold
4 Clean air line
5 Charge air cooler
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