ETH – ConferenceDaniele D'Onofrio
From 18th to 21st June took place in Zürich (Switzerland) the 22nd ETH-Conference on Combustion Generated Nanoparticles. This interdisciplinary platform brings together representatives from research, industry and legislation to debate on all aspects of nanoparticles, freshly emitted from various sources, aged in ambient air, technical mitigation aspects, impact of particles on health, environment and climate.
Mr. Gerhard Müller, chair of the CITA emission expert group, was invited as a speaker to the focus event regarding the topic “Emission of In-use Vehicles: Quality and Control”.
His presentation was about the importance of loaded periodic emission tests for petrol and diesel vehicles. He also introduced the main results of several laboratory test CITA members conducted over the last years.
Mr. Müller stated that because the emission behavior of modern petrol and diesel engines becomes more and more similar, a differentiation in the test procedures is not meaningful any more. In addition, a minimum load is necessary for a periodic emission test to be able to evaluate modern after treatment systems properly, e. g. for the emission of NOx, CO or HC. In consequence a loaded periodic emission test would guarantee that a vehicle complies with the requirements during the whole live cycle, because it would be able to detect not only manipulation, but even more important normal deterioration which will occur in every vehicle after some years or higher mileage.
The experience of PTI organizations around Europe is that only if failures can be detected, these defective vehicles will be maintained or repaired which is on the other hand the precondition to keep the emission standard on a high level. In summary a modernized periodic emission test for diesel and petrol vehicles would have a strong impact especially on air quality in urban areas.
There CITA strongly recommends to take actions on a European level.