Development of اot exhaust emission factors for iranian-made euro-2 certified light-duty vehicles

Banitalebi, E ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1021/acs.est.5b05611
  3. Publisher: American Chemical Society , 2016
  4. Abstract:
  5. Emission factors (EFs) are fundamental, necessary data for air pollution research and scenario implementation. With the vision of generating national EFs of the Iranian transportation system, a portable emission measurement system (PEMS) was used to develop the basic EFs for a statistically significant sample of Iranian gasoline-fueled privately owned light duty vehicles (LDVs) operated in Tehran. A smaller sample size of the same fleet was examined by chassis dynamometer (CD) bag emission measurement tests to quantify the systematic differences between the PEMS and CD methods. The selected fleet was tested over four different routes of uphill highways, flat highways, uphill urban streets, and flat urban streets. Real driving emissions (RDEs) and fuel consumption (FC) rates were calculated by weighted averaging of the results from each route. The activity of the fleet over each route type was assumed as a weighting factor. The activity data were obtained from a Tehran traffic model. The RDEs of the selected fleet were considerably higher than the certified emission levels of all vehicles. Differences between Tehran real driving cycles and the New European Driving Cycle (NEDC) was attributed to the lower loading of NEDC. A table of EFs based on RDEs was developed for the sample fleet
  6. Keywords:
  7. Dynamometers ; Fleet operations ; Vehicles ; Chassis dynamometers ; Emission measurement ; Emission measurement systems ; Exhaust emission factors ; Light duty vehicles ; New european driving cycles ; Transportation system ; Weighted averaging ; Air pollution control equipment ; gasoline ; air pollutant ; exhaust gas ; fuel consumption ; measurement method ; traffic emission ; transport vehicle ; air pollution ; Article ; controlled study ; dynamometer ; highway ; Iran ; motor vehicle ; sample size ; urban area ; analysis ; car driving ; chemistry ; procedures ; theoretical model ; Tehran [Iran] ; Air Pollutants ; Automobile Driving ; Environmental Monitoring ; Models, Theoretical ; Vehicle Emissions
  8. Source: Environmental Science and Technology ; Volume 50, Issue 1 , 2016 , Pages 279-284 ; 0013936X (ISSN)
  9. URL: http://pubs.acs.org/doi/abs/10.1021/acs.est.5b05611