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
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
–
Is
a
chemical
reaction
within
the
system
and
the
engine
provides
sufficient
exhaust
gas
temperature
for
regeneration.
Active
Regeneration
–
The
engines
duty
cycle
does
not
provide
sufficient
exhaust
temperature
for
passive
regeneration.
The
ARD
operates
in
order
to
raise the temperature of the exhaust gas. When the
regeneration process is complete, the ARD turns off.
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
Your ARD may perform an active regeneration while
your engine is at idle. During this active regeneration
of the DPF, the engine may operate at idle for periods
longer than 5 minutes.
i04084269
Diesel
Particulate
Filter
Regeneration
The temperature of the exhaust gas and the tem-
perature of the exhaust system components can
reach up to 650 °C (1202 °F) during regeneration.
An unexpected failure of the engine or an unex-
pected failure of the aftertreatment system may
increase temperature at the diesel particulate fil-
ter to as high as 900 ° C (1652 ° F) gas tempera-
ture. This may result in fire, burn, or explosion
hazards, which may result in personal injury or
death. Do not expose flammable material or ex-
plosive atmospheres to exhaust gas or to ex-
haust system components during 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
– Is a chemical reaction
within the system and the engine will create enough
heat in order to regenerate the DPF.
Active Regeneration
– The engine does not create
enough heat in order to regenerate the DPF. The
ARD must be used to create the heat necessary to
regenerate the DPF.
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SEBU8601-04