TU Graz has developed new measurement techniques and methods to measure emissions from category-L vehicles in realistic operation and to determine corresponding limit values.
The following text is a summary of an article about the measurement campaign of our project partner TU Graz, which was published on 9 January 2025.
Since accurate measurement technology for light vehicles don’t exist, researchers at TU Graz have developed unique emission measurement methodologies and equipment by using miniaturised equipment. Out of the 150 vehicles tested by LENS, 40 measurements took place at the facilities of the Austrian university.
Solving the challenge of developing small measurement technologies was essential, as larger emission measurement equipment for cars, which might weight up to 60kg, cannot be used for L-vehicle measurements, as it would affect vehicle performance and measurement results. For motorbikes, the necessary reduction in size and weight was achieved by involving an external partner. For the weaker vehicles, a consortium partner contributed small measuring devices which, although not as accurate, provide good reference values.
The team also created route profiles to account for various vehicle classes and driving styles. A model-based method for exhaust mass flow calculations enabled precise emission measurements, even for small engines, using compact devices that provided reliable reference data. The outcomes provide essential tools for manufacturers and regulators, helping reduce pollutant emissions across this vehicle class.
Read the full text here and learn more about the measurement results and related challenges.