Daimler Freightliner Cascadia 2021, Driver Manual

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need for DPF cleaning or replacement 20 to
30% sooner than would normally be required.
IMPORTANT: See the engine manufacturer’s
operation manual for complete details and op-
eration of the ATS.
Euro V Emission Compliant Engines
for Export
IMPORTANT: Depending on local jurisdictional
guidelines, vehicles that are domiciled outside of
the U.S. and Canada may not have emissions
aftertreatment systems (ATS) that are compliant
with EPA regulations.
Vehicles sold with Euro V engines for export are
required to use diesel with a maximum sulfur
content as follows:
•
Cummins Engines 50 ppm (tolerant to 500
ppm)
•
Detroit Engines 50 ppm
See Fig. 14.1 for an example of the label.
EPA10 and Newer Engines
The EPA mandates that all engines built after De-
cember 31, 2009 must reduce the level of emissions
exhausted by the engine to the following levels:
•
Nitrogen Oxides (NOx) – 0.2 g/bhp-hr
•
Particulate Matter (PM) – .01 g/bhp-hr
To meet EPA guidelines, engines that are compliant
with EPA10 and newer regulations use an ATS
where the exhaust first passes over the diesel oxida-
tion catalyst (DOC), then passes through the diesel
particulate filter (DPF), which traps soot particles.
The soot is burned to ash during a process called
regeneration (regen). A Selective Catalytic Reduction
(SCR) device is used to reduce NOx downstream of
the engine. After exhaust gases leave the DPF, a
controlled quantity of diesel exhaust fluid (DEF) is
injected into the exhaust stream. In the presence of
heat, DEF is converted to ammonia gas, which re-
acts with NOx in the selective catalyst chamber to
yield nitrogen and water vapor, which exit through
the tailpipe.
Regeneration
The harder an engine works, the better it disposes of
soot. If the exhaust temperature is high enough, a
process called
passive regeneration (regen) occurs
as the vehicle is driven normally. However, if the en-
gine isn’t running hot enough, the electronic controls
may initiate an
active regen , whereby extra fuel is
injected into the exhaust stream to superheat and
reduce the soot trapped in the DPF to ash. Active
regen happens only when the vehicle is moving
above a certain speed, determined by the engine
manufacturer. See your engine operation manual for
complete details. Both active and passive regen hap-
pen automatically, without driver input.
WARNING
Active regeneration can occur automatically any-
time the vehicle is moving. The exhaust gas tem-
perature could reach 1500°F (800°C), which is hot
enough to cause a fire, heat damage to objects
or materials, or personal injury to persons near
the exhaust outlet. The exhaust temperature can
remain high even after the vehicle has stopped.
When stopping the vehicle shortly after an auto-
matic regen, ensure the exhaust outlets are di-
rected away from structures, vegetation, flam-
mable materials, and anything else that may be
harmed by exposure to high heat.
See Regen Switches , below, for instructions on
preventing automatic regen if necessary.
When operating conditions do not allow for ATD filter
cleaning by active or passive regen, the vehicle may
require a driver-activated
parked regen . When this
occurs, the driver display screen presents a message
indicating that a regen is required. See
Fig. 14.2 .
The driver must either bring the vehicle up to high-
way speed to increase the load (thus starting an ac-
tive regen), or park the vehicle and initiate a parked
f080203 06/11/2018
USA DIÉSEL CON
50 PPM MÁXIMO
DE AZUFRE
24-01472-002
(Use diesel with a maximum sulfur content of 50 ppm)
Fig. 14.1, Euro V Engine Label (Detroit engine label
shown)
Emissions and Fuel Efficiency
14.2