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permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
16
Engine
Particulate filter in the 3.0-litre V6 common rail engine and in the 2.0-litre pump injection
engine
(roll-out planned for 1st quarter 2005)
Audi uses regenerative, additive-free particulate filters.
The Catalysed Soot Filter (CSF for short) has filter coatings containing precious metals which act in two ways.
During the passive regeneration process, which takes place when the car is being driven at motorway speeds,
temperatures of between 350 and 500 °C are reached. This causes the soot particulates deposited in the
particulate filter to be converted into CO
2
.
The process of active regeneration runs in the background and is triggered automatically by temperature-
increasing measures.
Reference
For information on design and
function, refer to Self-Study
Programme 325.
Connections to the differential pressure sensor
Pretreated exhaust gas containing soot
Tempera tur e sender
Treated soot-free exhaust gas
Particulate separation
343_021
343_020
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