VM Motori R754EU6C Manual De Instrucciones página 79

R754EU6C
AFTER-TREATMENT SYSTEMS (ATS)
The ATS system consists of a Diesel Oxidation Catalyst (DOC), a Diesel Particulate Filter
(DPF), and a Selective Catalyst Reduction (SCR) system.
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These components burn off collected particulate matter in a process called "regeneration"
and reduce nitrous oxides (NOx).
VM MOTORI FCA ITALY 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 catalyst.
DEF is pumped through the unit DCU box to the DEF injector.
The DEF injector sprays DEF into upstream SCR module to produce a chemical reaction.
This chemical reaction converts the nitrogen oxide (NOx) present in the exhaust gas into
water vapour and nitrogen.
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