Engine Operation
i07290374
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 needed for a walk-around inspection of the
engine.
After the engine is started and after the engine
reaches normal operating temperature, the engine
can be operated at the rated rpm. The engine will
reach normal operating temperature faster when the
engine is at rated speed. The engine will reach
normal operating temperature faster when the engine
is at 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.
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.
Engines rated for constant speed use are allowed to
complete a starting sequence, an operation at a
single constant speed, and a shutdown sequence.
Every time the engine is run, each of these
operations should occur only once. The starting
sequence and shutdown sequence can include a
short period of operation at the low idle speed for
purposes of warming up and cooling down the engine
or driven equipment. The emissions type approval is
not valid for operation of a constant speed engine in
a manner different from that described above.
Emissions regulations require that the value of the
carbon dioxide (CO
2
) emissions be reported to the
end user. For this engine, 696 g/kWh was determined
to be the CO
2
value determined during the EU type-
approval process and recorded in EU type-approval
certificate. This CO
2
measurement results from
testing over a fixed test cycle under laboratory
conditions a (parent) engine representative of the
engine type (engine family) and shall not imply or
express any guarantee of the performance of a
particular engine.
i08769092
Diesel Particulate Filter
Regeneration
Regeneration
Regeneration is the process of increasing exhaust
temperatures to remove soot from the DPF.
Regeneration also reduces hydrocarbons across the
DOC and the DPF, reduce sulfur from SCR, and
remove DEF deposits from the DEF injector.
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.
The Electronic Control Module (ECM) uses multiple
inputs from the engine and the machine to determine
the best time for regeneration to be performed.
Regenerations take place throughout the operating
cycle of the engine automatically.
Automatic adjustments of engine speed may be
noticed during regenerations. If regeneration is taking
place and the engine is taken to low idle, the engine
speed may remain elevated to maintain the
regeneration.
Under certain operating conditions, the regeneration
may be stopped. The ECM will continue to monitor
inputs to determine the best time to restart the
regeneration. If needed, the operator will be notified
via display that action is required to allow
regeneration.
DPF – This indicator will illuminate to
show that regeneration is required.
Regeneration Triggers
Regeneration may be required for the following
reasons:
Soot: The DPF will collect soot produced by the
engine. Automatic regeneration will become active to
reduce soot level.
Sulfation Regeneration: The SCR will have sulfur
build up over time. The ECM will calculate sulfur
buildup and once accumulation hits a threshold, will
trigger regeneration to reduce sulfur.
M0087475-06 61
Operation Section
Engine Operation
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