This article reports two investigations by CONCAWE (the oil companies' European organisation for environment, health and safety) on the effects of fuels on vehicle emissions. CONCAWE studied how the electronic management system (EMS) of an advanced diesel car engine reacts to changes in diesel fuel density, and thus how vehicle emissions, especially particulates and nitrogen oxides (NOx), can be affected. A high-speed turbocharged direct injection diesel engine with advanced technology was tested, mainly using a chassis dynamometer emissions test over a standard operating cycle. The results show that it should be possible to design fuel injection systems to make engine performance depend less on density variations. The second project tested five petrol vehicles, chosen for their good emissions performance, to compare them with a fleet of 16 prototype vehicles tested in the European Programme on Emissions, Fuels and Engine Technologies (EPEFE). The findings help to show that the EPEFE results do not underestimate car emissions, and that carbon monoxide (CO) and hydrocarbon (HC) emissions reduce with aromatic content. The two studies show the possible range of fuel effects, and indicate that there are no easy solutions to reducing exhaust emissions by changing aromatics or E100 matrix.

  • Corporate Authors:


    Brussels,   Belgium 
  • Publication Date: 1995-10


  • English

Media Info

  • Pagination: p. 8-9
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00723163
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Jul 26 1996 12:00AM