Journal of Earth Sciences and Geotechnical Engineering
On-road emission measurements in Sweden 2007-2015
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Abstract
In different studies reaching from 2007 through 2015 on-road emission measurements on heavy-duty buses and passenger cars have been conducted in Gothenburg, Sweden. Measurements of bus emissions have been carried out both from the roadside during real-world driving conditions with a remote sensing instrument, and during controlled driving conditions with both a remote sensing instrument and an Engine Exhaust Particle Sizer Spectrometer (EEPS). All measured emissions (CO, HC and NOx) from gasoline cars have continuously decreased from Euro 1 to Euro 6. Regarding diesel vehicles, emissions of nitrogen oxides from buses and passenger cars have not decreased significantly from the Euro 3 to the Euro 5 emission standard. A few diesel passenger cars and buses of the Euro 6 emission standard are included in the data set, which show a lower average emission of nitrogen oxides compared to Euro 5 vehicles. For buses a comparison between diesel and RME (Rapeseed Methyl Ester) was conducted. It was found that particle emissions from buses driving on 100% RME were 88% lower compared to emissions from buses fueled with conventional diesel.
