Engine With Exhaust Gas Aftertreatment - Emergency Stop Via Automation System - MTU 16V4000M73 Operating Instructions Manual

5.11 Engine with exhaust gas aftertreatment – Emergency stop via
automation system
NOTICE
An emergency stop subjects the engine system to an extremely high load.
Risk of overheating, damage to components!
• Trigger an emergency stop only in emergency situations.
Emergency engine stop via automation system
Item
Automation system
Overview of emergency stop functions
MTU designa-
tion
Function
Engine behavior
Behavior of ex-
haust gas after-
treatment sys-
tem (SCR sys-
tem)
Implementation
Comment
CAUTION:
Emergency stopping may cause overheating rendering the dosing units inoperable. Dosing system compo-
nents must be consequently replaced. The SCR system does not work any more if the dosing units are dam-
aged by overheating.
(*) Actuate the Power-Off SCR switch:
• When performing maintenance work on the SCR boxes
• When servicing the ECU
• in case of fire in the SCR system
• On taking the entire urea solution system out of operation (e.g. in case of malfunction).
Action
Emergency stop via the automation system (→ Operating Instructions Auto-
mation System).
Normal stop
"Power-Off SCR"(*)
SCR OFF in the event of
faults, power supply OFF
Engine running; no impact
on engine function
Sensors/actuators, control
units OFF; circulation cool-
ing OFF
Interruption of power supply
to exhaust gas aftertreat-
ment system implemented
by shipyard as color-coded
ON/OFF switch
Pumps and/or actuators to
supply the SCR system with
urea solution and to be in-
stalled by the shipyard,
must be combined with SCR
Emergency emergency stop
by the shipyard.
Emergency stop
Emergency stop function
"Emergency Engine Stop"
Emergency engine stop
Engine at standstill; fuel in-
jection OFF
Circulation cooling contin-
ues to run
MS150123/01E 2017-05 | Operation | 71
Emergency stop
Higher-level emergency
stop function
"Emergency System Stop"
Emergency stop of engine
and EGA
Engine at standstill, power
supply to engine interrupted
Exhaust gas aftertreatment
OFF, power supply to ex-
haust gas aftertreatment
system interrupted; circula-
tion cooling OFF
Engine and exhaust gas af-
tertreatment system have
separate power supplies.
Both supplies must be inter-
rupted for an "Emergency
System Stop".