Exhaust aftertreatment system
Engines equipped with diesel particulate filter (DPF)
The engine features an exhaust aftertreatment system (EATS)
that consists of a diesel particulate filter (DPF) which reduces
particles, and a selective catalytic reduction system (SCR) which
reduces the content of nitrogen oxide (NO
x
). The DPF and SCR
catalysts are all located in the machine’s muffler. AdBlue®/DEF is
injected in the exhaust flow to reduce NO
x
.
In the muffler there is also a diesel oxidation catalyst (DOC) that
supports the function in the DPF and SCR.
The DPF traps particles from the engine’s exhausts and, as it is
filled with these particles, it needs to be regenerated so that the
particles are burned off. Regeneration is also needed to release
sulphur (SO
2
) and other substances that have collected in the
SCR and reduce the efficiency of the SCR unless they are
removed.
In order to ensure reduction of NO
x
emissions, EATS is monitored
by the aftertreatment control module (ACM).
For more information, see page
193
.
Electrical system
Machines with engine alternative D11L/D11M have eight control
units (ECU).
Machines with engine alternative D11F have six control units
(ECU).
Machines with engine alternative D11E have seven control units
(ECU).
-
V-ECU
Located on the left side in the cab, in front of the circuit board.
Handles brakes, gearshifting, steering, and cooling fan control
on the machine.
- V2-ECU
Located on the left side in the cab, in front of the circuit board.
Handles dumping system, brake cooling system, ATC, and
differential locks.
-
W-ECU
Located on the left side in the cab, over the circuit board.
Handles CareTrack. (telematics system for remote monitoring
of information from the machine).
- HMIM
1 AdBlue®/DEF unit
2 Compressor
3 Fuel metering unit, aftertreatment
4 SCR catalytic converters
5 AdBlue®/DEF nozzle
6 Mixing zone
7 Diesel particulate filter (DPF)
8 Diesel oxidation catalyst (DOC)
9 Fuel nozzle, aftertreatment
A Exhaust gases (from the engine)
B AdBlue®/DEF
C Compressed air
D Fuel + air for cleaning
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