2011 Ford F450 Super Duty Crew Cab Diesel Supplement 5th Printing - Page 55

2011 Ford F450 Super Duty Crew Cab Manual

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Maintenance and Specifications DIESEL EXHAUST SYSTEM: OXIDATION CATALYST/DIESEL PARTICULATE FILTER SYSTEM Your vehicle is equipped with a diesel particulate filter (DPF). The DPF is an inline filter in the exhaust system which reduces carbon emissions by trapping exhaust particles before they reach the tailpipe. The DPF looks similar to a traditional exhaust catalyst, except larger, and is part of the exhaust system under the vehicle. The DPF is coupled to a diesel oxidation catalyst, that reduces the amount of harmful exhaust emitted from the tailpipe. As soot gathers in the system it begins to restrict the filter. The soot gathered inside the filter needs to be periodically cleaned. The soot can be cleaned in two different ways; passive regeneration and active regeneration. Both methods occur automatically and require no actions from the driver/operator. During either one of these regeneration methods you may notice an increase/change in exhaust noise/tone. At certain times, the message center will display various messages related to the DPF. See Message center in the Instrument Cluster chapter in the Owner Guide for more information. Passive regeneration In passive regeneration, the exhaust constituents / temperature are at an appropriate level where some soot can be reduced or oxidized (burned) thus cleaning the filter. This method occurs naturally as a result of normal engine operating conditions (at varying levels due to drive patterns). Active regeneration Once the DPF is full of exhaust particles, the engine control module will command the exhaust system to clean the DPF through a process called active regeneration. Active regeneration requires the engine computer to raise the exhaust temperature to eliminate the particles. During cleaning, the particles are converted to harmless gasses, and the DPF will then be clean and ready to continue trapping exhaust particles. The regeneration process operates more efficiently when the vehicle is safely operated at least 30 mph (48 km/h) with a steady pedal for approximately 20 minutes to complete the process. The frequency and duration of regeneration will fluctuate as both are determined by how you drive your vehicle, outside air temperature, and altitude. For most driving, regeneration frequency will vary from 100 - 500 miles (161 805 km) between occurrences and each occurrence will last from 9 20 minutes. The duration of regeneration is usually reduced if a constant speed above 30 mph (48 km/h) is maintained. 55 2011 Diesel (eco) Supplement, 5th Printing USA (fus)

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DIESEL EXHAUST SYSTEM: OXIDATION CATALYST/DIESEL
PARTICULATE FILTER SYSTEM
Your vehicle is equipped with a diesel particulate filter (DPF). The DPF
is an inline filter in the exhaust system which reduces carbon emissions
by trapping exhaust particles before they reach the tailpipe. The DPF
looks similar to a traditional exhaust catalyst, except larger, and is part
of the exhaust system under the vehicle. The DPF is coupled to a diesel
oxidation catalyst, that reduces the amount of harmful exhaust emitted
from the tailpipe. As soot gathers in the system it begins to restrict the
filter. The soot gathered inside the filter needs to be periodically cleaned.
The soot can be cleaned in two different ways; passive regeneration and
active regeneration. Both methods occur automatically and require no
actions from the driver/operator. During either one of these regeneration
methods you may notice an increase/change in exhaust noise/tone. At
certain times, the message center will display various messages related
to the DPF. See
Message center
in the
Instrument Cluster
chapter in
the
Owner Guide
for more information.
Passive regeneration
In passive regeneration, the exhaust constituents / temperature are at an
appropriate level where some soot can be reduced or oxidized (burned)
thus cleaning the filter. This method occurs naturally as a result of
normal engine operating conditions (at varying levels due to drive
patterns).
Active regeneration
Once the DPF is full of exhaust particles, the engine control module will
command the exhaust system to clean the DPF through a process called
active regeneration. Active regeneration requires the engine computer to
raise the exhaust temperature to eliminate the particles. During cleaning,
the particles are converted to harmless gasses, and the DPF will then be
clean and ready to continue trapping exhaust particles.
The regeneration process operates more efficiently when the vehicle is
safely operated at least 30 mph (48 km/h) with a steady pedal for
approximately 20 minutes to complete the process. The frequency and
duration of regeneration will fluctuate as both are determined by how
you drive your vehicle, outside air temperature, and altitude. For most
driving, regeneration frequency will vary from 100 - 500 miles (161 -
805 km) between occurrences and each occurrence will last from 9 -
20 minutes. The duration of regeneration is usually reduced if a constant
speed above 30 mph (48 km/h) is maintained.
Maintenance and Specifications
55
2011 Diesel
(eco)
Supplement, 5th Printing
USA
(fus)