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M0076814-03
Engine Operation
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.
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. These issues are
harmful to the engine.
Gauge readings should be observed and the data
should be recorded frequently whilst 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.
Engine Operation and the
Aftertreatment System
The exhaust gases and hydrocarbon particles from
the engine first pass through the Diesel Oxidation
Catalyst (DOC. Some of the gases and hydrocarbon
particles are oxidized as they pass through the DOC.
The gases then pass through the Diesel Particulate
Filter (DPF. 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
and the ash remains in the DPF. The gases finally
pass through the Selective Catalytic Reduction
(SCR. Before the gases pass through the SCR,
Diesel Exhaust Fluid (DEF is injected into the gas
stream. The DEF is controlled by the Pump
Electronic Unit (PEU. The mixtures of DEF and the
exhaust gas pass through the SCR reducing the NOx
in the exhaust emissions.
The engine software will control the amount of DEF
that will be required to keep the exhaust emission
compliant.
This design of DPF will require a service
maintenance interval. Refer to this Operation and
Maintenance Manual, "Maintenance Interval
Schedule" for more information. The DPF can be
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expected to function properly for the useful life of the
engine (emissions durability period), as defined by
regulation, subject to prescribed maintenance
requirements being followed.
Diesel Particulate Filter
Regeneration
Regeneration
Regeneration is to increase the exhaust temperature
for a given time. The Aftertreatment Regeneration
Device (ARD creates the heat which makes
regeneration possible. The regeneration process is
used to remove soot from the DPF, and warmup the
Selective Catalyst Reduction (SCR system. 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.
Regeneration Indicators
shows that elevated emission temperatures are
possible. This indicator will turn off when
regeneration is complete.
Regen" " is less than a pre-determined amount of
time.
Regeneration Switch
Note: If equipped with a rocker style switch, the
MIDDLE position of the regeneration switch is the
default position for automatic regeneration.
Regeneration Active – When
illuminated, this indicator shows that
the system is active. This indicator
DPF – This indicator will illuminate to
show that regeneration is required. This
indicator will illuminate when " " Time to
Regeneration Disabled – This indicator
will illuminate to show that regeneration
has been disabled.
Force Regeneration – Press in the top
switch for 2 seconds to begin
regeneration.
Disable Regeneration – Press in the
bottom switch for 2 seconds to disable
regeneration.
49
Operation Section
Engine Operation
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