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5.16 Engine with exhaust gas aftertreatment – Stopping via
automation system
NOTICE
Stopping the engine when it is running at full load causes extreme stress to the engine.
Risk of overheating, damage to components!
• Before shutting down, disengage gear and run the engine at idle speed for at least 10 minutes until
engine temperatures have dropped and constant values are displayed.
Stopping the engine via the automation system
Item
Action
Automation system
Stopping engine via the automation system (→ Automation system Operating
Instructions).
Overview of operating modes
Operating mode
Stopping in normal operation
MTU designa-
tion
Engine Stop
Key-Switch
Manual Switch-Off
SCR/IMO II/IMO III (am
LOP)
Function
Engine stop
Engine stop
Manual deactivation of the
urea-solution injection in
IMO II mode or in th event
of faults
Engine behavior
Engine at standstill, control
units ate active
Engine at standstill, control
units switch OFF when cir-
culation cooling is complet-
ed.
Engine running; no impact
on engine function. Engine
stop not tripped.
Behavior of ex-
haust gas after-
treatment sys-
tem (SCR sys-
tem)
Circulation cooling* contin-
ues to run
Circulation cooling* contin-
ues to run; control units
switch OFF when circulation
cooling is completed.
Circulation cooling* contin-
ues to run; IMO II operation
through LOP and bridge
control console. Engine gov-
ernor monitors circulation
cooling after engine stop.
Implementation
LOP display IMO II
(→ Page 59)
Comment
(*) The subsystem requires continued circulation cooling with urea solution circulation
after the engine was stopped to avoid thermal damage to the dosing units.
For this purpose, a separate “Power-Off SCR" switch is provided in addition to the"Emer-
gency Engine Stop" button(→ Page 71).
MS150123/01E 2017-05
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