Report - DCE - Nationalt Center for Miljø og Energi

Euro II and III engines switches to a fuel efficient engine running mode, thus
leading to increasing NOx emissions (Figure 3.62).
Exhaust particulate emissions from road transportation vehicles are well below
PM2.5. The emissions from light- and heavy-duty vehicles have significantly
decreased since the mid-1990s due to gradually stricter EURO emission
standards. The environmental benefit of introducing diesel private cars
with lower particulate emissions since 1990 is more than outbalanced by an
increase in sales of new vehicles in recent years (Figure 3.65).
An undesirable environmental side effect of the introduction of catalyst cars
is the increase in the emissions of NH3 from the first two generations of catalyst
cars (Euro I and II) compared to conventional cars. The emission factors
for later catalytic converter technologies are considerably lower than the
ones for Euro I and II, thus causing the emissions to decrease from 2001 onwards
(Figure 3.63).
The 2010 emission shares for heavy-duty vehicles, passenger cars, light-duty
vehicles and 2-wheelers for NOx (52, 35, 13 and 0 %), NMVOC (5, 58, 8 and
18 %), CO (6, 77, 7, 10 %), PM (25, 37, 35 and 3 %) and NH3 (1, 96, 3 and 0 %),
are also shown in Figure 3.67.
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1985
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1997
1999
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2005
2007
2009
Passenger cars Light duty vehicles
Heavy duty vehicles 2-wheelers
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1997
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2009
Passenger cars Light duty vehicles
Heavy duty vehicles 2-wheelers
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