2.4 Exhaust Gas Aftertreatment System
Exhaust aftertreatment technology is used to
comply with mandatory Tier 4 Final and Stage IV
standards. All installation requirements must be
followed for the system to comply with emission
regulations.
The technology is based on treating exhaust gases
with an additive before they pass through the
catalytic converter. The additive – AdBlue®/DEF
solution –reacts with the oxides of nitrogen (NOx)
and converts them into nitrogen and water, which
occur naturally in our environment.
The additive is a solution of 32.5% urea in water.
The solution must comply with the ISO-22241
standard. The additive used by the technology has
different names in different markets, such as DEF
or AdBlue®(1).
IMPORTANT!
IMPORTANT!
NOTICE!
7 Temperature sensor
8 Dosage valve, high flow system
9 Silencer with catalytic converter
10 ACM (control module)
11 NOx sensor (downstream catalytic converter)
15
CHAPTER2—PRODUCTOVERVIEW
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