Conference Agenda
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WG1: Aerosol emissions from gasoline and diesel combustion engines
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3:00pm - 3:15pm
TH4-5: 1 Primary and secondary emissions from Euro6 vehicles 1Aix-Marseille Univ, CNRS, LCE, Marseille, France; 2French Agency for Ecological Transition, ADEME, Angers, France; 3Department of Environmental Engineering, Democritus University of Thrace, 67100 Xanthi, Greece; 44Univ Lyon,Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626, Villeurbanne, France; 5Univ Gustave Eiffel, Univ Lyon, laboratory AME-EASE, F-69675 Lyon, France; 6CEREA, Ecole des Ponts, Institut Polytechnique de Paris, EdF R&D, IPSL, Marne la Vallée, France Pirmary and Secondary emissions from Euro6 vehicles are here presented. Diesel cars were characterized by the emission of high quantities of NOx and low quantities of black carbon (BC). The diesel passenger car exhibited very low VOCs emission factors (EFs) compared to the diesel commercial vehicle, especially during the cold urban cycle. On the contrary, gasoline Euro6 vehicles emitted low quantities of NOx, but high BC and VOCs, particularly during the cold start of the engine. Both gasoline vehicles were characterized by high monoaromatics EFs. Results will be discussed in term of technology and fuel type.
3:15pm - 3:30pm
TH4-5: 2 Particle emissions and secondary aerosol formation from Euro 6 natural gas vehicle – comparison to gasoline and diesel vehicles 1University of Eastern Finland, Finland; 2Tampere University, Finland; 3University of Eastern Finland, Finland; 4University of Rostock, Germany; 5Helmholtz Zentrum München, Germany This study examines direct particle emissions and secondary aerosol formation from three Euro 6 light-duty vehicles: a gasoline vehicle with a particulate filter, a diesel vehicle with a particulate filter, and a CNG vehicle without a filter. Measurements were taken during repeated 1-hour driving cycles. Results showed the highest direct emissions from the CNG vehicle and the highest secondary organic aerosol formation from the diesel vehicle. The study highlights the need for further research on unregulated emissions, particularly for Euro 6 CNG vehicles, to better understand their impact on air quality and human health.
3:30pm - 3:45pm
TH4-5: 3 Secondary aerosol formation potential of exhaust emitted by light-duty vehicles 1Finnish Meteorological Institute, Finland; 2VTT Technical Research Centre of Finland, Espoo, Finland; 3Aerosol Physics Laboratory, Physics Unit, Tampere University, Tampere, Finland; 4BOSMAL Automotive Research and Development Institute Ltd, Bielsko-Biala, Poland; 5The Institute of Experimental Medicine of the CAS, Prague, Czech Republic This study explores the influence of fuel, engine technology and aftertreatment systems on the secondary aerosol formation potential from exhaust emissions by light-duty (LD) traffic.
3:45pm - 4:00pm
TH4-5: 4 Particle number testing in the periodic technical inspection (PN-PTI) of gasoline vehicles Joint Research Centre, Italy Since 2022, several European countries have added a particle number (PN) test in the PTI of diesel vehicles equipped with DPF, the so-called PN-PTI test. This study examines five different testing procedures for PN-PTI testing of gasoline vehicles and compares PN-PTI emissions with type-approval PN emissions tested with the worldwide harmonized light vehicles test cycle (WLTC).
4:00pm - 4:15pm
TH4-5: 5 Performance of Portable Emissions Measurement Systems (PEMS) in Chassis Dynamometers and On-Road Tests for Vehicle Exhaust Particle Quantification 1National Physical Laboratory (NPL), Teddington, United Kingdom; 2Physikalisch-Technische Bundesanstalt, Braunschweig, Germany; 3Danish Technological Institute, Aarhus, Denmark; 4VTT Technical Research Centre of Finland, Espoo, Finland Ultrafine particles (UFP) and gaseous pollutants emitted from vehicle exhausts are major contributors to air pollution in urban areas. In the EU, the number of solid exhaust particles is regulated for on-road type approval of vehicles by testing real driving emissions (RDE) using portable emissions measurement systems (PEMS). However, compared to reference instruments used in laboratory testing, PEMS have larger measurement uncertainty due to simpler design, while metrological validation of PEMS is currently lacking. This work studied the performance and uncertainty of PEMS in laboratory and RDE test to underpin the current and future conformity factors.
4:15pm - 4:30pm
TH4-5: 6 PM emissions from road traffic based on vehicle speed spatiotemporal profiles – A case study for Thessaloniki, Greece 1Aristotle University of Thessaloniki, Department of Physics, Laboratory of Atmospheric Physics, 54124, Greece; 2Centre for Research and Technology Hellas, Hellenic Institute of Transport, 6th km Charilaou-Thermi Rd, 57001 Thermi-Thessaloniki, Greece This study presents an updated emissions inventory for Thessaloniki, Greece, focusing on particulate matter emissions from road transport. Using high-resolution vehicle speed data, spatiotemporal emission profiles were developed and compared with static ones. Results show reduced emissions during summer months and distinct diurnal peaks, especially in the city center and eastern residential areas, contrasting with static profiles. Both inventories are integrated into an air quality modeling system to assess their impact on aerosol concentration simulations, highlighting the importance of dynamic traffic data in urban air quality management.
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