Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 215
Scenario
DPF
Outlet
Temp
‘High’
Air Inlet
Temp
Programmed
Low Idle
Speed
Description
Purge Cycle
Completion
Method
1 Yes No
Effect
<1000rpm Engine will continue to run
at the programmed LI speed
until the DPF out
temperature is acceptable
or for a maximum of 15
minutes.
Engine
running
2 No >5°C No Effect Engine will shut down when
keyswitch power is removed
Battery only
3 No <,/= 5°C No Effect Engine will continue to run
~70 seconds and
execute the DEF fluid purge
prior to shutting down
Engine
running
Table 16.4 DES and Purge Interaction
Note:
DPF Outlet Temp is a virtual temperature channel. This temperature is
used to determine whether exhaust temperature conditions are safe for
engine shutdown when DES is active.
Where engine controlled Delayed engine shutdown is not acceptable it is
recommended that the OEM follows a machine shutdown procedure for
system cool down post ignition Off similar to the one described in section
16.3.1.3.
In the event that during ignition key switch OFF the DES procedure needs to
be overridden and shutdown, the User Defined Shutdown can be used to shut
the engine down without completing the DES procedure. It is recommended
therefore that a 4 position ignition key switch is used on all machines using
DES with the 4
th
position connected to the ECM User defined shutdown input.
This enables the machine operator to override the DES feature when
conditions require it. In the event of a 4 position key switch being unsuitable
for the machine the OEM must provide a means by which the operator may
trigger the user defined shutdown to override the DES procedure. Figure 16.4
provides an overview of the DES interaction with the User Defined Shutdown
message and DES Active Indicator.