Component Description For Exhaust Gas Recirculation Cooler - Mercedes-Benz OM 471 Introduction Into Service Manual

GF14.20>W>2020H
ENGINE 471.9 in MODEL 963, 964
Location
1 Charge air housing
2 Charge air pipe (mixer housing)
3 Exhaust gas recirculation cooler
Y621 Exhaust gas recirculation positioner
The exhaust gas recirculation cooler (3) is
located on the right side of the engine over
the exhaust manifold and the turbocharger.
Task
The exhaust gas recirculation cooler (3)
cools the branched off exhaust from a
temperature of approx. 650 ∞C to a
temperature of approx. 170 ∞C.
Design
3 Exhaust gas recirculation cooler
4 Exhaust chamber
5 Coolant strip
6 Coolant output (feed line to nozzle unit
for diesel particulate filter
regeneration)
7 Coolant line (return line from nozzle
unit for diesel particulate filter
regeneration)
8 Coolant outlet
9 Exhaust outlet (to charge air pipe)
10 Coolant output (to coolant pump)
11 Exhaust inlet (from exhaust manifold)
12 Front end cover
13 Rear end cover
14 Coolant outlet
The exhaust gas recirculation cooler (3)
consists of an oblong box>shaped housing,
with two disconnected chambers > the
exhaust chamber (4) and the coolant strip (5).
Function
The branched off exhaust flows through the exhaust inlet (11)
into the exhaust chamber (4) and flows through it and on to the
exhaust outlet (9) towards the charge air pipe (2), where it is then
fed together with the fresh air or the charged air to the
combustion process.
i Introduction of engine OM 471 and exhaust aftertreatment > 09/2011 >

Component description for exhaust gas recirculation cooler

– This printout will not be recorded by the update service. Status: 09 / 2011 –
System components
Coolant from the engine's coolant circuit permanently flows
through the coolant strip (5) of the exhaust gas recirculation
cooler.
The exhaust gas that flows in the exhaust chamber (4) is cooled by
the heat transfer.
20.7.11
W14.20>1021>76
W14.20>1022>76
187