Mercedes-Benz Series 176 Introduction Into Service Manual page 57

Description of engine OM 607
High-pressure circuit exhaust gas recircu-
lation
The CDI control unit evaluates the input signals of
the components involved. The stored characteris-
tics map is then used as the basis for actuating the
engine high-pressure exhaust gas recirculation
actuator. The different ways of actuating the
exhaust gas recirculation valves serve to regulate
the untreated, recirculated exhaust gases.
The recirculated exhaust gases are routed into the
charge air manifold on the cylinder head.
i Note
The exhaust gas recirculation actuators and the
exhaust flap controller are monitored through
their actual value potentiometers.
56 b Introduction of the New A-Class, Model Series 176
– This printout will not be recorded by the update service. Status: 06 / 2012 –
Low-pressure circuit exhaust gas recircu-
lation
The exhaust gas recirculation actuator increases or
reduces the volume of recirculated exhaust gas to
match the degree of actuation by the CDI control
unit.
The exhaust gas cleaned by the diesel particulate
filter with oxidation catalytic converter is routed
through the drivetrain control unit into the EGR
cooler to match the actuation of the exhaust flap
controller. The cooled gas is routed over the
exhaust gas recirculation actuator downstream of
the hot film MAF sensor into the air intake pipe.
M16/57 Exhaust flap controller
P14.20-2329-00