SEBU8605-01 55
Operation Section
Engine Operation
Engine Operation
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Engine Operation
Proper oper
ation and maintenance are key factors
in obtaining the maximum life and economy of
the engine. If the directions in the Operation and
Maintenan
ce Manual are followed, costs can be
minimized and engine service life can be maximized.
Thetimeth
at 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
operati
ng temperature. The engine will reach normal
operating temperature sooner during a low engine
speed (rpm) and during a low-power demand. This
procedu
re 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. C omparing the data over time will
help t
o determine normal readings for each gauge.
Comparing data over time will also help detect
abnormal operating developments. Significant
chan
ges in the readings should be investigated.
Redu
ction of Particulate Emissions
The Diesel Particulate Filter (DPF) will reduce
par
ticulate emissions. The DPF collects the soot and
any ash that is produced by the combustion in the
engine. During regeneration, the soot is converted
int
o a gas which is released into the atmosphere. The
Ash remains in the DPF.
Th
e temperature of the DPF must be above a
particular value in order for regeneration to occur.
The exhaust gas provides heat for the regeneration
pr
ocess.
Passive Regeneration – Theengineprovides
s
ufficient exhaust gas temperature for regeneration.
Engine Operati
on and a DPF
During normal engine operation, the operator of the
engine may not
ice the lack of black smoke from the
exhaust system.
Passive rege
neration 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
automatica
lly be increased in order to allow passive
regeneration to occur.
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