DAILY 4x4 ‒ GUIDELINES FOR BODYBUILDERS
ADBLUE AND SCRT SYSTEM
6.1 GENERAL INFORMATION
5
– Printed 692.68.999 – 3 Ed. - Base 08-2020
ADBLUE AND SCRT SYSTEM
6.1 GENERAL INFORMATION
To comply with Euro VI Regulations on engine gas emissions, IVECO has developed the "SCRT" (Selective Catalytic Reduction
Technology) system, consisting of the combined action of a diesel particulate filter (DPF) and post-treatment of exhaust gas (SCR).
This post-treatment requires the use of an additive, commercially known as AdBlue (urea solution+water).
6.2 THE NITROGEN OXIDE CATALYTIC REDUCTION PRINCIPLE
The additive AdBlue, is sent from a dedicated tank by means of a SM (Supply Module) pumping module to a DM (Dosing Module)
which injects AdBlue into the exhaust pipe. The mixture of exhaust gas and additive is then fed into the catalytic converter and
chemically transforms NO
X
into nitrogen and water, which are harmless to the environment.
6.2.1 Main components of the SCRT system
279569
Figure 1
1. Diesel Oxidation Catalyst
2. Diesel Particulate Filter
3. Selective Catalytic Reduction
4. Clean Up Catalyst
5. Dosing Module
6. Temperature sensors
7. DPF Δp sensors
8. NO
X
sensors
9. PM sensor
10. Double mixer
DOC: to oxidise the exhaust gas components through the use of oxygen.
DPF: to eliminate the particulate before SCR through passive regeneration.
SCR: to reduce the NO
X
through the injection of AdBlue.
CUC: to eliminate the ammonia residues (NH
3
).
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