DAF SCR Technology: The road to a bright future
Exhaust gases and environment
The XF105 complies with the active European emission legislation norm Euro 5.
This means that per kW performance, during one hour, not more than 2 gram of
nitrogen oxide (NO
x
) originates from the exhaust and not more than 0.02 gram of
soot (PM).
For complying with the EEV emission norm, all engines can optionally be equipped
with a passive soot filter. This flow through filter doesn’t need any maintenance
neither has consequences on the operational vehicle costs.
The DAF solution
Realizing these low values, all DAF engines make use of high pressure fuel injection
systems with precise injection timing. The resulting excellent combustion values
radically prevent the formation of soot. DAF engines do not need soot filters.
The temperature and pressure during the combustion process cause chemical
reactions between nitrogen and oxygen resulting in nitrogen oxide (NO
x
)
dissipating in the exhaust stream.
To suppress the amount of nitrogen oxides (NO
x
) DAF engines benefit from SCR
(Selective Catalytic Reduction). This technology ‘purifies’ the exhaust stream
by injecting in minute measured quantities an additive; AdBlue into the exhaust
stream before reaching the muffler/catalyst. The result of this proces is to convert
NO
x
into harmless nitrogen (as in our surrounding air) and water vapor.
Engine
AdBlue tank
Catalyst
15 DAF XF105 QUICK GUIDE
56073_DAF XF Quickguide Basis.indd 15 25-05-2009 10:32:18
