Mercedes-Benz OM 471 Introduction Into Service Manual page 221

System components
GF49.20>W>3010H
ENGINES 471.9 in MODEL 963, 964 with CODE (M5Z) Engine version Euro VI
Location
4 Diesel oxidation catalytic converter
(DOC)
5 Diesel particulate filter (DPF)
B37 Pressure sensor, exhaust upstream
of oxidation catalytic converter
B38 Exhaust pressure sensor
downstream of diesel particulate
filter
B67 Exhaust temperature sensor
upstream of diesel oxidation
catalytic converter
B68 Exhaust temperature sensor
downstream of upper diesel
oxidation catalytic converter
B69 Exhaust temperature sensor
downstream of lower diesel
oxidation catalytic converter
B70 Exhaust temperature sensor
downstream of diesel particulate
filter
The diesel particulate filter (DPF) (5) is integrated in the exhaust
aftertreatment unit. It is the second location downstream of the
diesel oxidation catalytic converter (DOC) (4) to be reached by the
exhaust downstream of the engine.
Task
The diesel particulate filter (DPF) (5) is used for filtering and
storing the soot particles in the exhaust, which occur during the
combustion process in the engine.
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218
Diesel particulate filter of the exhaust aftertreatment unit, component
description
– This printout will not be recorded by the update service. Status: 09 / 2011 –
Design
The diesel particulate filter (DPF) (4) consists of two cylindrical
inserts with a metal sleeve. Inside the filter is the actual filter
element, which consists of a porous monolithic block made from
silicon carbide (SiC).
In order to assist with passive regeneration and counteract rapid
filter clogging, the filter element is covered with a series of rare
metals > the so>called oxidization layer (wash coat).
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20.7.11
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