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Operation (cont.)
AFTERTREATMENT SYSTEM
The
engine
and
vehicle
Aftertreatment System to capture soot and other particulates
before they exit the exhaust pipe. The soot is captured by the
Diesel Particulate Filter (DPF) and is periodically converted to
carbon dioxide (CO
) by a Regeneration (Regen) process.
2
The Regen process may take place during vehicle operation
(Active Regen). The Active Regen process will be triggered by
either a time-based soot or a soot mass buildup-based strategy.
A Parked Regen process is required when insufficient thermal
energy has not been present to initiate the process for Diesel
Oxidation Catalyst (DOC) light off. The vehicle is required to be
parked (stationary).
•
A Parked Regeneration will be requested if the Passive
Regeneration cannot be completed during driving.
•
In this case, a lamp will be lit to alert the operator to perform
a Parked Regeneration.
•
The operator must park the vehicle and then perform the
Regen as required.
•
Follow the Parked Regeneration process listed in the Vehicle
Operator Manual.
•
If the Parked Regeneration process is ignored, the engine
may stop running.
Page 52
SECTION 4 – ENGINE OPERATION
exhaust
piping
includes
Form No. 1172040R1
Printed in the United States of America
•
See the "Safety Information" (page 3) section for safety
precautions.
an
A Preliminary Diesel Oxidation Catalyst (PDOC) and a DOC
operates together to oxidize the injected fuel to increase the
exhaust gas temperature as needed for DPF Regen.
ENGINE IDLE SHUTDOWN TIMER (FEDERAL-OPTIONAL)
GOVERNMENT REGULATION: State and local
regulations may limit engine idle time. The vehicle
owner or operator is responsible for compliance with
these regulations.
The optional Idle Shutdown Timer (IST) allows the Engine
Control Module (ECM) to shutdown the engine during extended
idle. Idle time can be programmed from 5 to 120 minutes. The
ECM can be programmed to deactivate the IST when the Power
Takeoff (PTO) is active.
Thirty seconds before engine shutdown, the IDLE SHUTDOWN
indicator illuminates. This continues until the engine shuts down
or the low idle shutdown timer is reset. The engine must be out of
gear for the IST to work. Engine shutdown timer will deactivate
for one or more of the following conditions:
•
Engine speed is not at idle speed (700 rpm).
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