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Presentation
EATS (Exhaust Aftertreatment
System)
EATS (Exhaust Aftertreatment System) is used to
reduce emissions and comply with statutory emission
levels. The EATS system consist of a, DPF-system
and a SCR-system. (Diesel particular filter system and
a Selective catalytic Reduction system and Ammonia
slip cat), AdBlue®/DEF is injected in the exhaust gases
before they pass through the catalytic
converter.Sensors measure nitrogen oxide (NOx)
levels in the exhaust gases.
The engine control unit calculates the optimum amount
of solution to be added in relation to engine load and
engine speed, to achieve efficient reduction of nitrogen
oxides.
NOTICE! All kind of tampering or modifications of the
engine and it´s EATS system will void the type-
approval of this particular engine.
®
AdBlue
/DEF
The solution that is injected in the exhaust gases is a
clear, transparent liquid with a faint odor of ammonia;
it consists of de-ionized water mixed with 32.5% urea
(the solution must meet ISO 22241 standards / API
AUS 32). The urea in the exhaust is broken down into
ammonia which reacts with NOx to form harmless
nitrogen and water vapor, which occur naturally in our
surroundings.
The solution is not flammable or harmful to health with
normal use; it is however very corrosive to metals,
especially copper and aluminum.
IMPORTANT:
The use of solution that do not fulfill the ISO 22241
standard will compromise the aftertreatment system
performance, increase emissions.
Any warranty claims will be rejected.
NOTICE! The urea solution has different names in
®
different markets, e.g. DEF or AdBlue
. The solution
is designated either AdBlue or AdBlue/DEF in display
messages.
Monitoring
For VE: The system is monitored to ensure that all
system components are working as they should, that
®
the quality of the AdBlue
/DEF fulfills set standards
and that the tank level is not too low. Should the system
detect deviations, the maximum engine torque and
engine speed will be reduced and related fault codes
are communicated on CAN and stored in the control
unit. For Genset the engine will be shut down. For
further information refer to EATS Inducements, VE-
engines (EU), page 44.
47713625 06-2021 © AB VOLVO PENTA
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