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| Titel |
Real Driving NOx Emissions of European Trucks and Detection of Manipulated Emission Systems |
| VerfasserIn |
Denis Pöhler, Tim Adler, Christopher Krufczik, Martin Horbanski, Johannes Lampel, Ulrich Platt |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250149624
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| Publikation (Nr.) |
 EGU/EGU2017-13991.pdf |
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| Zusammenfassung |
| Nitrogen dioxide (NO2) is the most problematic pollutant in Europe and many other
countries. NO2 has a negative impact for the health and the environment, and in most
European cities the currently allowed mean annual limit of 40μg/m3 is exceeded.
Vehicles, especially Diesel, are the most relevant source. They emit NOx (NO +
NO2), and NO can also be converted to NO2 in the atmosphere. Thus vehicle NOx
emissions are regulated in the EU with the EURO Norm Standard (e.g. EURO 6
since 1.1.2013 for trucks with 400mg/kWh). Trucks achieve these low emissions
with complex emission after treatment systems. All EURO 6 trucks and almost
all EURO 5 trucks use the SCR system consuming AdBlue to reduce the NOx
emissions.
Since the diesel emission scandal for cars, it is well known that real driving emissions (RDE)
can be several times higher that the EURO Norm Standard. The main problem is that RDE
are only randomly investigated.
Here we present a study of NOx RDE of more than 250 randomly chosen trucks on German
highways. The measurements were performed with a newly developed mobile NOx-ICAD +
CO2 -instrument applying the plume chasing measurement principle, where the pollutants are
investigated in the emission plume and were converted to emission factors to be compared
to the EURO standard. For most trucks the brand, the model name, the country
of registration and its EURO class could be determined and used in a statistical
analysis.
The observed NOx emission data show that typical truck RDE are in the range of the
expected EURO Norm or slightly higher. However, almost every fourth truck from Eastern
Europe show emissions much higher that the EURO Norm. This was not observed for
German trucks. As the emissions increase up to a factor of 5 to 10 these view trucks
contribute significantly to the air pollution. These high emissions clearly indicate a defect
emission treatment system. Most likely it indicates illegal manipulated emissions systems
where the AdBlue injection is blocked (AdBlue emulator) to save money. This study
shows that our measurement system can effectively investigate these manipulated
vehicles.
Further results and consequences of NOx RDE from trucks are presented. |
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