Nozzle Unit For Dpf Regeneration, Component Description - Mercedes-Benz OM 471 Introduction Into Service Manual

System components
GF49.20>W>3012H
ENGINES 471.9 in MODEL 963, 964 with CODE (M5Z) Engine version Euro VI
Location
1 Metering device for DPF regeneration
2 Nozzle unit for DPF regeneration
3 Fuel line
4 Exhaust pipe
5 Coolant line
6 Coolant line
7 Leakage line
The nozzle unit for DPF regeneration (2) is
on the right>hand side of the engine next to
the exhaust pipe (4) downstream of the
turbocharger.
Task
The nozzle unit for DPF regeneration (2) is
used for injecting the correct quantity of
diesel fuel provided by the metering device
for DPF regeneration (1) into the exhaust
flow during active diesel particulate filter
(DPF) regeneration.
Design
8 Cooling adapter
9 Housing lower section
10 Sealing ring
11 Injection nozzle
12 Shielding pot
13 Gasket
Function
The nozzle unit for DPF regeneration (2) injects the diesel fuel
that is present at the injection nozzle into the exhaust flow in a
fine spray (atomized). Backflow is prevented by the integrated
check valve.
Because of the temperature present at the exhaust pipe, it is
cooled using the coolant from the engine's coolant circuit.
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Nozzle unit for DPF regeneration, component description

– This printout will not be recorded by the update service. Status: 09 / 2011 –
20.7.11
W49.20>1017>76
W49.20>1019>11