SEBU8605-01
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Operation Section
Engine Operation
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). These issues are
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. Signi
fi
cant
changes in the readings should be investigated.
Reduction of Particulate Emissions
The Diesel Particulate Filter (DPF) will 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.
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.
Passive Regeneration –
The engine provides
suf
fi
cient exhaust gas temperature for regeneration.
Engine Operation and a DPF
During normal engine operation, the operator of the
engine may notice the lack of black smoke from the
exhaust system.
Passive regeneration is the process that is used
by the DPF in order to remove soot from the DPF.
In some applications, the engine idle speed will
automatically be increased in order to allow passive
regeneration to occur.