Air Quality, Atmosphere & Health

, Volume 12, Issue 9, pp 1113–1126 | Cite as

Investigation of factors affecting the gaseous and particulate matter emissions from diesel vehicles

  • Bei WangEmail author
  • Yik-Sze Lau
  • Yuhan Huang
  • Bruce Organ
  • Shun-Cheng Lee
  • Kin-Fai HoEmail author


This study presents a detailed investigation of diesel vehicle emissions utilizing chassis dynamometer testing. The recruited vehicle fleet consists of 15 in-use diesel vehicles, spanning a wide range of emission standards, engine sizes, weight, model year, etc. The real-time emission concentrations of nitrogen oxides (NOx), total hydrocarbons (THC), carbon monoxide (CO) and carbon dioxide (CO2), and the mass of particulate matter (PM) collected on filters are measured and used to calculate the vehicle emission factors (EFs) under various driving conditions. Results show that in general EFs of NOx, CO, THC, and PM of the recruited fleet span a wide range of values (NOx 0.80 ± 0.34 to 60.28 ± 2.94 g kg−1; THC 0.10 ± 0.04 to 5.28 ± 1.28 g kg−1; CO below detection limits to 24.01 ± 8.48 g kg−1; PM below detection limits to 2.47 ± 1.22 g kg−1). Further data analysis shows that the implementation of a higher emission standard has a significant effect on reducing the emission of pollutants, except for NOx. Driving conditions are also important factors affecting the EFs. Besides, statistical analysis shows a significant correlation between EFs of NOx with the testing weight and the maximum engine power of the vehicle. Further investigation is recommended to explore the effect of maintenance of the vehicles to the vehicular emission.


Diesel engine Criteria air pollutants Emission factor Emission standard 


Funding information

The work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong SAR, China (UGC/FDS25/E06/15).

Supplementary material

11869_2019_729_MOESM1_ESM.docx (135 kb)
ESM 1 (DOCX 134 kb)


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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Faculty of Science and TechnologyTechnological and Higher Education Institute of Hong KongChai WanHong Kong
  2. 2.School of Public Health and Primary CareThe Chinese University of Hong KongSha TinHong Kong
  3. 3.Centre for Green Technology, School of Civil and Environmental EngineeringUniversity of Technology SydneySydneyAustralia
  4. 4.Jockey Club Heavy Vehicle Emissions Testing and Research CentreTsing Yi IslandHong Kong
  5. 5.Department of Civil and Structural EngineeringThe Hong Kong Polytechnic UniversityHung HomHong Kong

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