ON BOARD MEASUREMENT OF FUEL CONSUMPTION AND EXHAUST EMISSIONS FOR A THREE-WAY CATALYST CAR IN REAL-WORLD TRAFFIC

OMBORDMAETNING AV BRAENSLEFOERBRUKNING OCH AVGASEMISSIONER FOER EN KATALYSATORBIL VID KOERFOERLOPP I VERKLIG TRAFIK

Fuel consumption, emissions of nitrogen oxides (NOx) and hydrocarbons (HC) for a gasoline passenger car with catalyst were measured on-the-road for three driving patterns. The on board measurement system developed at VTI includes analyzers for gaseous pollutants, fuel flow metering, temperature registration (oil, cooling water, fuel etc., total eight cases) as well as logging of time and distance. Effects on emissions and fuel consumption of road type and of cold start were studied. Distances of the three traffic types representing City centre, Intermediate area and Motorway were respectively 16.7 km, 20.1 km and 31.5 km. They were chosen to reflect the traffic patterns mentioned. Nitrogen oxides formation is favoured by the good (complete) combustion resulting from high and constant engine load. This is borne out by NOx emissions vs. mileage rising in order: City centre, Intermediate, Motorway. Hydrocarbons and carbon monoxide, on the contrary, are oxidized (to form carbon dioxide and water) by complete combustion, as illustrated by HC declining in the same sequence. Fuel consumption decreasing according to City centre, Intermediate, Motorway corroborates prevalent data to the effect that specific fuel consumption is seen to increase with speed in the high speed range. The report also describes extending of the fuel/pollutant measurement instrumentation with a broadband alpha-sensor and IR analyzers for monitoring of CO2 and high range CO and of low range CO. (A) This document is also available electronically via Internet at URL: http://www.vti.se/PDF/reports/M900.pdf.

• Record URL:
  http://www.vti.se/PDF/reports/M900.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03476049
• Corporate Authors:

  Swedish National Road and Transport Research Institute (VTI)

  Linköping,   Sweden  SE-581 95
• Authors:
  • LENNER, M
• Publication Date: 2003

Language

• Swedish

Media Info

• Features: References;
• Pagination: 30 p.
• Serial:
  • VTI MEDDELANDE
  • Issue Number: 900
  • Publisher: Swedish National Road and Transport Research Institute (VTI)
  • ISSN: 0347-6049

Subject/Index Terms

• TRT Terms: Automobiles; Catalytic converters; Cold starts (Driving); Field tests; Fuel consumption; Hydrocarbons; Measurement; Nitrogen oxides; Pollutants
• ITRD Terms: 1243: Car; 1394: Catalytic converter; 1809: Cold starting; 2442: Emission; 232: Fuel consumption; 7367: Hydrocarbon; 6226: In situ; 6136: Measurement; 7380: Nitrogen oxide
• Subject Areas: Energy; Environment;

Filing Info

• Accession Number: 00967377
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Files: ITRD
• Created Date: Jan 13 2004 12:00AM