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R754EU6EH
AFTER-TREATMENT SYSTEMS (ATS)
The ATS system consists of a Diesel Oxidation Catalyst (DOC), a Diesel Particulate Filter
(DPF), and a catalyst consisting of Selective Catalyst Reduction (SCR) and Clean Up
GB
Catalyst (CUC).
These components burn off collected particulate matter in a process called "regeneration"
and reduce nitrous oxides (NOx).
VM MOTORI STELLANTIS EUROPE uses an actively regenerated after-treatment
system.
The exhaust gases from a diesel engine produce levels of nitrogen oxide (NOx) that must
be reduced. To meet emission standards, a Selective Catalyst Reduction (SCR) system
has been added to the current ATS.
The NOx reduction system consists of a Dosing Control Unit (DCU box), a tank for Diesel
Exhaust Fluid (DEF), a DEF injector, and an SCR- CUC catalyst.
DEF is pumped through the unit DCU box to the DEF injector.
The DEF liquid injector sprays the liquid before the SCR module to produce a chemical
reaction. This chemical reaction converts the nitrogen oxide (NOx) present in the exhaust
gas into nitrogen dioxide (N
) and water (H
O). At the end of the process, the integrated
2
2
CUC removes residual ammonia (NH
).
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