SURVEY OF GASEOUS POLLUTANT EMISSIONS FROM TUNED IN-SERVICE GASOLINE ENGINED CARS OVER A RANGE OF ROAD OPERATING CONDITIONS

The emissions of carbon monoxide, total hydrocarbons and nitrogen oxides from a sample of twenty in-service gasoline engined cars which had been tuned to the manufacturers' specifications have been determined on the road using the WSL exhaust gas proportional sampler. Fuel consumptions were determined by carbon balance. The highest carbon monoxide and total hydrocarbon emissions occurred during urban drives in the average speed range about 17 to about 22 kph. As the average speed increased these emissions reduced rapidly, but above approximately 80 kph the carbon monoxide emissions started to rise again. The tendency for emissions to rise at speeds above 80 kph was much less marked in the case of total hydrocarbons. The variation of nitrogen oxides emissions with average speed was not consistent, however, emissions at 113 kph could be similar to or up to 2.4 times the urban value. The on-the-road emission factors determined in this survey have been used to provide an example of estimations of vehicle emissions on a vehicle activity disaggregated basis. (Copyright (c) Crown Copyright, December 1983.)

• Supplemental Notes:
  • See also PB84-204825.
• Corporate Authors:

  WARREN SPRING LABORATORY

  GUNNELS WOOD ROAD
  STEVENAGE, HERTS  United Kingdom  SG1 2BX
• Authors:
  • Potter, C J
  • Savage, C A
• Publication Date: 1984

Media Info

• Pagination: 184 p.

Subject/Index Terms

• TRT Terms: Carbon monoxide; Exhaust gases; Fuel consumption; Gasoline engines; Hydrocarbons; Motor vehicles; Nitric oxide; Nitrogen oxides; Speed; Traffic speed
• Subject Areas: Energy; Highways; Operations and Traffic Management; Planning and Forecasting; Vehicles and Equipment; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00393995
• Record Type: Publication
• Source Agency: Energy Research Abstracts
• Files: TRIS
• Created Date: Jun 30 1985 12:00AM