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Types of Diesel Particulate Filter Regeneration
Types of diesel particulate filter regeneration that are performed while the machine is operating:
Type of Regeneration
Passive
Assist
Reset
Types of diesel particulate filter regeneration that require you to park the machine:
Type of Regeneration
Parked
Recovery
Conditions for DPF regeneration
Occurs during normal operation of the machine at
high-engine speed or high-engine load
Occurs as a result of low-engine speed, low-engine
load, or after the computer detects back pressure
in the DPF
Occurs after assist regeneration only if the
computer detects that assist regeneration did not
sufficiently reduce the soot level
Also occurs after the first 50 engine hours and then
every 100 hours to reset baseline sensor readings
Conditions for DPF regeneration
Soot buildup occurs as a result of prolonged
operation at low-engine speed or low-engine load.
May also occur as a result of using incorrect fuel
or oil
The computer detects back pressure due to soot
buildup and requests a parked regeneration
Occurs as a result of ignoring parked regeneration
requests and continuing operation, adding more
soot when the DPF is already in need of a parked
regeneration
DPF description of operation
The display does not display an icon indicating
passive regeneration.
During passive regeneration, the DPF processes
high-heat exhaust gasses; oxidizing harmful
emissions and burning soot to ash.
Refer to
Passive DPF Regeneration (page
During assist regeneration, the computer controls
the intake throttle to increase the exhaust
temperature, enabling assist regeneration to occur.
Refer to
Assist DPF Regeneration (page
During reset regeneration, the computer controls
the intake throttle and fuel injectors to increase the
exhaust temperature during regeneration.
Refer to
Reset Regeneration (page
DPF description of operation
When the parked-regeneration icon
is displayed on the display, a regeneration is
requested.
• Perform the parked regeneration as soon as
possible to avoid needing a recovery regeneration.
• A parked regeneration requires 30 minutes to
complete.
• You must have at least a 1/4 tank of fuel in the
tank.
• You must park the machine to perform a recovery
regeneration.
Refer to
Parked Regeneration and Recovery
Regeneration (page 57)
for your machine.
When the recovery-regeneration icon
displayed on the display, a recovery regeneration is
requested.
• A recovery regeneration requires approximately 4
hours to complete.
• You must have at least a 1/2 tank of fuel in the
machine.
• You must park the machine to perform a recovery
regeneration.
Refer to
Parked Regeneration and Recovery
Regeneration (page 57)
for your machine.
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