Articles online

Emissions from Light-Duty Diesel and Gasoline in-use Vehicles Measured on Chassis Dynamometer Test Cycles

Category: Diesel Engine Emission

Volume: 15 | Issue: 1 | Pages: 99-116
DOI: 10.4209/aaqr.2014.01.0006
PDF | RIS | BibTeX

Célia A. Alves 1, Diogo J. Lopes1, Ana I. Calvo2, Margarita Evtyugina1, Sónia Rocha1, Teresa Nunes1

  • 1 Centre for Environmental And Marine Studies, Department of Environment, University of Aveiro, 3010-193 Aveiro, Portugal
  • 2 Department of Physics, IMARENAB, University of León, 24071 León, Spain


Emission factors and exhaust gas composition were obtained from dynamometer tests.
Cold-start emissions may be underestimated in current emission inventories.
The technological developments had a positive impact on CO and PM emissions.
Gravimetric methods will have difficulties accurately quantifying PM mass emissions.
High OC/EC were obtained for gasoline and modern diesel vehicles with PM filters.


The reduction in vehicle exhaust emissions achieved in the last two decades is offset by the growth in traffic, as well as by changes in the composition of emitted pollutants. The present investigation illustrates the emissions of eight in-use gasoline and diesel passenger cars using the official European driving cycle and the ARTEMIS real-world driving cycles. Measurements comprised gaseous regulated pollutants (CO, CO2, NOx and hydrocarbons), particulate matter and its carbonaceous content (organic and elemental carbon, OC and EC), as well as about 20 different volatile organic compounds (VOCs) in the C6–C11 range. It was observed that some of the vehicles do not comply with the corresponding regulations. Significant differences in emissions were registered between driving cycles. Not all regulated pollutants showed a tendency to decrease from Euro 3 to Euro 5. The particulate carbon emission factors were significantly lower under the ARTEMIS Road compared with the ARTEMIS Urban driving cycle with cold start. In general, cold start-up driving conditions produced the highest emission factors. A tendency to the decline of carbonaceous emissions from Euro 3 to Euro 5 diesel vehicles was observed, whilst this trend was not registered for petrol-powered cars. The fraction of total carbon composed of EC was much lower in particles emitted by petrol vehicles (< 10%) than by diesel engines (50–95%). However, the EC content in emissions from more modern vehicles equipped with diesel particulate filter (DPF) is almost negligible. Among VOCs, benzene, toluene and xylenes were generally the dominant species. A significant decrease in emissions from Euro 4 to Euro 5 petrol-powered vehicles was observed. The trend in VOC emissions is unclear when diesel engines are considered. During DPF regeneration cycles, pollutant emissions are several times larger than those during normal engine operation.


Chassis dynamometer Emission factors Regulated pollutants OC/EC VOCs

Related Article

Emissions of Polycyclic Aromatic Hydrocarbons and Particle-Bound Metals from a Diesel Engine Generator Fueled with Waste Cooking Oil-Based Biodiesel Blends

Sheng-Lun Lin, Jen-Hsiung Tsai, Shui-Jen Chen , Kuo-Lin Huang, Chih-Chung Lin, Ho-Tsang Huang, Yi-Chin Hsieh, Chuen-Huey Chiu
Volume: 17 | Issue: 6 | Pages: 1679-1689
DOI: 10.4209/aaqr.2017.04.0151

Effect of Butanol Blends on Nano Particle Emissions from a Stationary Conventional Diesel Engine

Mohit Raj Saxena, Rakesh Kumar Maurya
Volume: 16 | Issue: 9 | Pages: 2255-2266
DOI: 10.4209/aaqr.2016.04.0144

Characteristics of Persistent Organic Pollutant Emissions from a Diesel-Engine Generator Fueled Using Blends of Waste Cooking Oil-Based Biodiesel and Fossil Diesel

Jen-Hsiung Tsai, Shui-Jen Chen , Kuo-Lin Huang, Guo-Ping Chang-Chien, Wen-Yinn Lin, Chien-Wei Feng, Jin-Yuan Syu, Ho-Tsang Huang
Volume: 16 | Issue: 8 | Pages: 2048-2058
DOI: 10.4209/aaqr.2016.06.0257

Reducing Cold Start Emissions from Automotive Diesel Engine at Cold Ambient Temperatures

Arumugam Sakunthalai Ramadhas, Hongming Xu , Dai Liu, Jianyi Tian
Volume: 16 | Issue: 12 | Pages: 3330-3337
DOI: 10.4209/aaqr.2015.11.0616