Report - DCE - Nationalt Center for Miljø og Energi

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The step-wise lowering of the sulphur content in diesel fuel has given rise to
a substantial decrease in the road transport emissions of SO2 (Figure 3.61). In
1999, the sulphur content was reduced from 500 ppm to 50 ppm (reaching
gasoline levels), and for both gasoline and diesel the sulphur content was
reduced to 10 ppm in 2005. Since Danish diesel and gasoline fuels have the
same sulphur percentages, at present, the 2009 shares for SO2 emissions and
fuel consumption for passenger cars, heavy-duty vehicles, light-duty vehicles
and 2-wheelers are the same in each case: 56, 26, 17 and 1 %, respectively
(Figure3.67).
7RQQHV
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Passenger cars Light duty vehicles
Heavy duty vehicles 2-wheelers
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ÃÃÃÃÃÃÉÃÃÃÃÃÃÃÃ Historically, the emission totals of NMVOC and CO have been very dominated
by the contributions coming from private cars, as shown in Figures
3.63- 3.64. However, the NMVOC and CO (and NOx) emissions from this
vehicle type have shown a steady decreasing tendency since the introduction
of private catalyst cars in 1990 (EURO I) and the introduction of even
more emission-efficient EURO II, III and IV private cars (introduced in 1997,
2001 and 2006, respectively).
In the case of NOx, the real traffic emissions for heavy duty vehicles do not
follow the reductions as intended by the EU emission legislation. This is due
to the so-called engine cycle-beating effect. Outside the legislative test cycle
stationary measurement points, the electronic engine control for heavy duty