Title
Implications of diesel emissions control failures to emission factors and road transport NOx evolution
Author
Ntziachristos, L.
Papadimitriou, G.
Ligterink, N.
Hausberger, S.
Publication year
2016
Abstract
Diesel NOx emissions have been at the forefront of research and regulation scrutiny as a result of failures of late vehicle technologies to deliver on-road emissions reductions. The current study aims at identifying the actual emissions levels of late light duty vehicle technologies, including Euro 5 and Euro 6 ones. Mean NOx emission factor levels used in the most popular EU vehicle emission models (COPERT, HBEFA and VERSIT+) are compared with latest emission information collected in the laboratory over real-world driving cycles and on the road using portable emissions measurement systems (PEMS). The comparison shows that Euro 5 passenger car (PC) emission factors well reflect on road levels and that recently revealed emissions control failures do not call for any significant corrections. However Euro 5 light commercial vehicles (LCVs) and Euro 6 PCs in the 2014–2016 period exhibit on road emission levels twice as high as used in current models. Moreover, measured levels vary a lot for Euro 6 vehicles. Scenarios for future evolution of Euro 6 emission factors, reflecting different degree of effectiveness of emissions control regulations, show that total NOx emissions from diesel Euro 6 PC and LCV may correspond from 49% up to 83% of total road transport emissions in 2050. Unless upcoming and long term regulations make sure that light duty diesel NOx emissions are effectively addressed, this will have significant implications in meeting future air quality and national emissions ceilings targets. © 2016 Elsevier Ltd
Subject
Urban Mobility & Environment
STL - Sustainable Transport & Logistics
ELSS - Earth, Life and Social Sciences
Mobility & Logistics
Emission
Urbanisation
Diesel light duty vehicles
NOx emissions
EFs
Emission control technologies
COPERT
HBEFA
VERSIT
To reference this document use:
http://resolver.tudelft.nl/uuid:4a0552f4-a6fb-487e-8d83-d9591545edf1
DOI
https://doi.org/10.1016/j.atmosenv.2016.07.036
TNO identifier
546234
Publisher
Elsevier Ltd
ISSN
1352-2310
Source
Atmospheric Environment, 141, 542-551
Document type
article