Road Tested: Comparative Overview of Real-World Versus Type-Approval NOₓ and CO₂ Emissions from Diesel Cars in Europe
Following the discovery in 2015 of an illegal defeat device on 590,000 Volkswagen vehicles with diesel engines in the United States (U.S. Environmental Protection Agency, 2017), several independent European organizations and governments conducted emissions testing on Euro 5 and Euro 6 passenger cars. This paper combines the publicly available emissions data from these organizations and government bodies, as well as data that International Council on Clean Transportation (ICCT) purchased from a commercial provider, to compare official laboratory-test and on-road nitrogen oxide (NOₓ) emissions for 541 Euro 5 and Euro 6 diesel passenger cars, representing 145 of the most popular European models. Previous research found that there is a gap between type-approval and real-world carbon dioxide (CO₂) emissions that has grown from less than 10% in 2001 to 42% in 2015 (Tietge et al., 2016). The authors also include estimates of the real-world CO₂ gap from Spritmonitor.de in this analysis. With respect to CO₂ emission values, this analysis shows that a divergence between type-approval and real-world CO₂ emissions exists for every manufacturer and car model. The average CO₂ divergence for Euro 5 and Euro 6 was approximately 30%. The manufacturers with the highest divergences were Mazda, Audi, Mini, BMW, Volvo, Opel/Vauxhall, Chevrolet, Renault, and Mercedes-Benz. The lowest divergences belonged to Škoda, Toyota, Fiat, Suzuki, and Mitsubishi. This paper concludes by outlining steps that can be taken to reduce on-road NOₓ and CO₂ emissions from passenger diesel cars.
- Record URL:
-
-
Supplemental Notes:
- © 2017 International Council on Clean Transportation.
-
Corporate Authors:
International Council on Clean Transportation (ICCT)
1500 K Street NW, Suite 650
Washington, DC United States 20005 -
Authors:
- Baldino, Chelsea
- Tietge, Uwe
- Muncrief, Rachel
- Bernard, Yoann
- Mock, Peter
- Publication Date: 2017-9
Language
- English
Media Info
- Media Type: Digital/other
- Edition: White Paper
- Features: Appendices; Figures; References; Tables;
- Pagination: 38p
Subject/Index Terms
- TRT Terms: Analysis; Automobile industry; Automobiles; Carbon dioxide; Diesel engines; Emissions testing; Nitrogen oxides; Pollutants
- Geographic Terms: Europe
- Subject Areas: Data and Information Technology; Environment; Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 01653780
- Record Type: Publication
- Files: TRIS
- Created Date: Dec 18 2017 9:34AM