Engine Operation
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Engine Operation
Proper operation and maintenance are key factors in
obtaining the maximum life and economy of the
engine. If the directions in the Operation and
Maintenance Manual are followed, costs can be
minimized and engine service life can be maximized.
The time that is needed for the engine to reach
normal operating temperature can be less than the
time taken for a walk-around inspection of the engine.
The engine can be operated at the rated rpm after the
engine is started and after the engine reaches
operating temperature. The engine will reach normal
operating temperature sooner during a low engine
speed (rpm) and during a low-power demand. This
procedure is more effective than idling the engine at
no load. The engine should reach operating
temperature in a few minutes.
Avoid excess idling. Excessive idling causes carbon
buildup, engine slobber and soot loading of the
Diesel Particulate Filter (DPF). This excess idling is
harmful to the engine.
Gauge readings should be observed and the data
should be recorded frequently while the engine is
operating. Comparing the data over time will help to
determine normal readings for each gauge.
Comparing data over time will also help detect
abnormal operating developments. Significant
changes in the readings should be investigated.
Reduction of Particulate Emissions
The Diesel Particulate Filter (DPF) and the
Aftertreatment Regeneration Device (ARD) work
together in order to reduce particulate emissions. The
DPF collects the soot and any ash that is produced
by the combustion in the engine. During regeneration,
the soot is converted into a gas which is released into
the atmosphere. The Ash remains in the DPF until the
ash is cleaned out of the DPF.
The temperature of the DPF must be above a
particular value in order for regeneration to occur. The
exhaust gas provides heat for the regeneration
process. There are two types of regeneration:
Passive Regeneration – The engine conditions are
sufficient for regeneration. The rate of regeneration is
much lower than active regeneration.
Active Regeneration – The engine duty cycle
conditions are not sufficient for passive regeneration
to occur.
The operator will receive information on the status of
the ARD from dash lamps and the driver will be able
to request a regeneration by using a switch. Refer to
this Operation and Maintenance Manual, “Monitoring
System” for more information.
Engine Operation and Active
Regeneration
Active regeneration can be performed at any engine
speed.
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Diesel Particulate Filter
Regeneration
Regeneration
Regeneration is the removal of soot from the Diesel
Particulate Filter (DPF). The Aftertreatment
Regeneration Device (ARD) is used to regenerate the
DPF. The DPF traps both soot and ash. The ash is
removed through a manual cleaning process. Refer
to Operation and Maintenance Manual, “Diesel
Particulate Filter - Clean” for more information on the
service of the DPF.
Types of Regeneration
Passive Regeneration – The engine conditions are
sufficient for regeneration. The rate of regeneration is
much lower than active regeneration.
Active Regeneration – The engine duty cycle
conditions are not sufficient for passive regeneration
to occur.
Regeneration Indicators
Five Indicators can be affected by the DPF
regeneration.
Note: Amber or yellow Warning Indicator can be use
as a diagnostic Indicator. For more information refer
to this Operation and Maintenance Manual,
“Diagnostic Lamp”.
Regeneration Active – The Indicator is
illuminated during active regeneration.
The Indicator will stay on until the
aftertreatment has cooled.
DPF – This Indicator provides a general
indication of the soot load. The Indicator
is off when the soot load is normal.
Note: If the Indicator is illuminated, a regeneration will
be required.
48 SEBU8609
Engine Operation
Engine Operation
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