OPEN ACCESS

Articles online

Emission Characterization of In-Use Diesel and Gasoline Euro 4 to Euro 6 Passenger Cars Tested on Chassis Dynamometer Bench and Emission Model Assessment

Category: Air Pollution Modeling

Volume: 17 | Issue: 9 | Pages: 2289-2299
DOI: 10.4209/aaqr.2017.02.0080
PDF | Supplemental material | RIS | BibTeX

Yao Liu 1, Simon Martinet1, Cédric Louis1,2, Anaïs Pasquier1, Patrick Tassel1, Pascal Perret1

  • 1 Transport and Environment Laboratory, IFSTTAR, 69675 Bron, France
  • 2 French Environment and Energy Management Agency, ADEME, 49004 Angers, France

Highlights

Measured NOx emission exceeded 1.6–8 times comparing to the type-approval limits.
High NOx emission might increase secondary organic aerosol formation.
NOx shows the cause for urban air quality concern with increase of Euro 5–6 cars.
Measured emission levels are in good agreement with the COPCETE predictions .
A positive conclusion regarding impact of emission model on policy-making process.


Abstract

This paper focuses on CO2 and regulated pollutants (NOx, HC, CO, PM) emitted by eight Euro 4–6 gasoline and diesel vehicles with six different technologies. The emission factors were repeatedly measured on a chassis dynamometer bench using Artemis Urban with cold and hot start, Road and Motorway, WLTC and NEDC driving conditions. The influence of driving conditions and approved driving cycles on pollutant emissions was also investigated. The measured emission factors for regulated compounds were compared to the corresponding emission factors of the COPCETE emission model developed by the French Ministry of Ecology. The results indicate that the NEDC cycle, used for type-approval of emissions of regulated compounds, leads to underestimation of CO2 (9–23%) and NOx (1.2 to 2 times) emissions and overestimation of CO and HC (2 to 5 times) in relation to the Artemis cycles, which are real-world simulation driving cycles. The WLTC cycle for the worldwide harmonization of vehicle emissions shows similar HC, NOx and CO emissions with the Artemis average cycle within uncertainty of the measurements. The NOx emissions measured were 1.6 to 8 times greater than the type-approval limits. These high NOx emissions produced by all the diesel vehicles tested under real-world driving conditions could serve as particle precursors and increase secondary organic aerosol formation. They are also indicative of the significant cause for concern regarding urban air quality and the increase in the portion of Euro 5 and 6 diesel vehicles in France's vehicle fleet. Regarding emission factor assessments, the emission levels measured are overall in fair agreement with the COPCETE predictions within uncertainties for CO2 and regulated pollutants. Updating the database is vital in order to be able to produce more representative emission factors and better evaluate the health and environmental effects from vehicle emissions.

Keywords

Regulated pollutant emission factors Driving conditions Diesel particulate filter Propulsion engine COPCETE emission model


Related Article

On the Origin of Surface Ozone Episode in Shanghai over Yangtze River Delta during a Prolonged Heat Wave

Jian-Bin Wu , Qian Wang, Huansheng Chen , Yuqia Zhang, Oliver Wild
Accepted Manuscripts
DOI: 10.4209/aaqr.2017.03.0101
PDF

A Simulation Study on PM2.5 Sources and Meteorological Characteristics at the Northern tip of Taiwan in the Early Stage of the Asian Haze Period

Ming-Tung Chuang , Charles C.-K. Chou, Neng-Huei Lin, Akinori Takami, Ta-Chi Hsiao, Tang-Huang Lin, Joshua S. Fu, Shantanu Kumar Pani, Yun-Ru Lu, Tsung-Yeh Yang

Evaluation of δ13C in Carbonaceous Aerosol Source Apportionment at a Rural Measurement Site

Johan Martinsson , August Andersson, Moa K. Sporre, Johan Friberg, Adam Kristensson, Erik Swietlicki, Pål-Axel Olsson, Kristina Eriksson Stenström
Volume: 17 | Issue: 8 | Pages: 2081-2094
DOI: 10.4209/aaqr.2016.09.0392
PDF | Supplemental material
;