VM R750EU6 Manual De Instrucciones página 90

R750EU6 - TE4 - IE4 - ISE4
AFTER TREATMENT EXHAUST GAS SYSTEM (ATS) - R750EU6 ENGINE MODELS
AFTERTREATMENT DEVICES
The ATS consists of a Diesel Oxidation Catalyst (DOC), a Diesel Particulate Filter (DPF),
GB
and a Selective Catalyst Reduction (SCR) system.
These components burn off collected particulate matter in a process called "regeneration"
and reduce nitrous oxides (NOx).
The key to successful regeneration is high exhaust temperature for a period of time. Wi-
thout adequate temperatures for regeneration, the DPF filter will continue to trap particu-
late and eventually plug. In order to avoid DPF plugging, VM Motori uses an actively-rege-
nerated Aftertreatment System.
The exhaust from a diesel engine produces levels of nitrous oxide (NOx) that must be
reduced. To meet emission standards, a Selective Catalyst Reduction (SCR) system has
been added to the current ATS.
The SCR 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 nitrous oxides (NOx) present in the exhaust stream into
water vapor and nitrogen.
INFORMATION ON THE DIESEL EXHAUST FLUID (DEF)
The Selective Catalytic Reduction (SCR Catalyst) aftertreatment system requires Diesel
Exhaust Fluid (DEF) to maintain exhaust emissions at levels compliant with emissions
standards.
Diesel Exhaust Fluid (DEF) is a simple, non-toxic and pre-mixed fluid composed of an
Aqueous Urea Solution.
Diesel Exhaust Fluid (DEF) is manufactured to strict quality standards to ensure
proper emissions control. Only DEF that meets ISO 22241 specifications can be
used.
IMPORTANT:
i
It is forbidden the use of solutions with different specifications.
English 14 2056G