Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 211
DPF Soot
Load
System Description
Engine %
Derate
Lamp status
0 < 79% From 0 to 79% soot loading
applications requiring a
moderate to high duty cycle
should regenerate without
any control system
intervention. In some cases
(low duty cycle or cold
ambient) to DPF soot
loading may exceed 79%.
N/A N/A
80 < 89% The Low Temperature
regeneration system may
take action to oxidize soot,
depending on the machine
operating conditions.
N/A N/A
90 < 115% Back pressure valve is
operated as required. The
back pressure valve is
disabled as soon as the soot
loading reduces to 79% or
below.
116 < 126% The low temperature
regeneration system takes
more aggressive actions to
attempt to reduce soot load.
The engine will derate
starting at 50% and rising to
100% when the soot load
reaches 127%. The engine
management system raises
an event code once the soot
load reaches 116% (E995-2)
which activates the engine
warning lamp. The lamp
remain active until the DPF
soot load is below 106%.
Engine
derate 50%
@ 116%
rising to
100% @
127%
Slow Flashing
Engine Warning
Lamp
127 < 140% Once the engine exceeds
127% the engine will be
100% derated and an event
code (E955-3) is raised.
Both the warning and
shutdown lamps are also
operated.
100%
Fast Flashing
engine Warning
Lamp
Engine Shutdown
Lamp
Table 16.3 Low Temperature Regeneration Operation Description
16.2 DEF System Operation
The Tier 4F DEF system is designed to provide optimum DEF dosing and
control performance. Each system is made up of the following components:
• DEF Pump
• DEF Controller or DCU
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