Cold-start emissions and excess fuel consumption at low ambient temperatures - Assessment of EU2, EU3 and EU4 passenger car performances

Recent developments of engines and emission control devices in passenger cars to bring them in compliance with the last amendments of European directives for exhaust emissions (EU3 and EU4) have apparently improved also their performance with regard to cold-start related emissions, even if the targeted test procedure to specifically measure and control these emissions was included in the type approval requirements of new types as late as the year 2002. However, as the test results presented in this paper demonstrate, cold-start performance has been gradually improved, and emission rates measured at low ambient temperatures (-7degeesC) have declined. However, the negative effect of cold environment with regard to fuel consumption and CO2 emissions has not much diminished. According the results, elevated emission levels at cold-start are also mostly associated with petrol-fuelled cars, as much lower levels were recorded for those with diesel engines. For the covering abstract see ITRD E141518.

• Corporate Authors:

  Technical University Graz

  Institute for Internal Combustion Engines and Thermodynamics, Inffeldgrasse 25
  A-8010 Graz,   Austria 
• Authors:
  • LAURIKKO, J
• Conference:
  • 16th International Transport and Air Pollution Congress
  • Location: Graz , Austria
  • Date: 2008-6-0
• Publication Date: 2008

Language

• English

Subject/Index Terms

• TRT Terms: Automobiles; Cold starts (Driving); Conferences; Diesel engines; Fuels; Pollutants; Temperature; Winter
• ITRD Terms: 1243: Car; 1809: Cold starting; 8525: Conference; 1314: Diesel engine; 2442: Emission; 3850: Fuel; 6722: Temperature; 2575: Winter
• Subject Areas: Energy; I15: Environment; I90: Vehicles;

Filing Info

• Accession Number: 01323103
• Record Type: Publication
• Source Agency: TRL
• Files: ITRD
• Created Date: Dec 22 2010 8:37AM