EUROCARGO Euro 6
–
SPECIAL INSTRUCTIONS FOR SCR
SPECIAL INSTRUCTIONS FOR SCR EXHAUST SYSTEM
6.1
GENERAL INFORMATION
5
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Printed 603.95.747
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1st Ed. - Base 12/2013
SPECIAL INSTRUCTIONS FOR SCR EXHAUST SYSTEM
6.1
GENERAL INFORMATION
To comply with Euro VI requirements on engine gas emissions, Iveco has developed the "Hi-e SCR" (High-efficiency Selective Cata-
lytic Reduction) system, consisting of the combined action of a diesel particulate filter (DPF) and post-treatment of exhaust gases
(SCR).
This post-treatment requires the use of an additive, commercially known as AdBlue (urea swater).
6.2
THE NITROGEN OXIDE CATALYTIC REDUCTION PRINCIPLE
The additive AdBlue, is sent from a dedicated reservoir by means of a SM (Supply Module) to a DM (Dosing Module) which injects
AdBlue into the exhaust pipe. The mixture of exhaust gas and additive is then fed to the catalytic converter and chemically trans-
forms NO
x
into nitrogen and water, harmless to the environment
In order to comply with Euro VI, new assemblies (DOC, passive DPF, CUC) and sensors are used which act as parameter control
functions.
Main components of SCRT system
189102
Figure 1
1.
DOC
2.
DPF
3.
SCR
4.
CUC
5.
DM (Dosing Module)
6.
Temperature sensors
7.
DPF
Δ
p sensors
8.
NO
x
sensors
9.
NH
3
Sensor
DOC
(Diesel Oxidation Catalyst)
: to oxidise the exhaust gas components through the use of oxygen
DPF
(Diesel Particulate Filter)
: to eliminate the particulate before the SCR through passive regeneration.
SCR
(Selective Catalytic Reduction)
: to reduce the NO
x
through the injection of AdBlue.
CUC
(Clean Up Catalyst)
: to eliminate the ammonia residue (NH
3
) so as to satisfy legal requirements.
Содержание EUROCARGO
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