Engine
SHOP MANUAL
Ch 1 page 37
Reductant doser
The reductant doser meters out the quantity of reductant, which the engine control unit indicates, to the
evaporator in the silencer. On industrial and marine engines the reductant is metered out to the hydrolysis
catalytic converter
1 Connection for electrical connector
2 Reductant inlet
3 Reductant outlet
4 Nozzle
5 Ventilation
The reductant doser is electrically heated to prevent the reductant from freezing when the outdoor tempera-
tures are low. The reductant doser is also equipped with a reductant temperature and pressure sensor and the
measurements are transmitted to the exhaust gas aftertreatment system.
1 Restriction valve
2 Prefilter
3 Pressure and temperature sensor
4 Nozzle
5 Solenoid valve
6 Heater element
Figure 56
Figure 55
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