In November 1992, Reading Buses began running three of their 200 bus fleet on rape methyl ester (RME) fuel, for a trial period of five months. The trial, which was the first in the UK, was a joint venture between Reading Transport Limited and the Italian company Novamont, who supplied the fuel. A fourth vehicle was later included in the trial in order that emission tests could be carried out. RME, often known as 'bio-diesel', is a substitute for diesel fuel that is manufactured from rape seed oil by a simple esterification process. At the beginning and end of the trial, the Department of Transport's Transport Research Laboratory (TRL) carried out tests comparing emissions from bio-diesel with those from conventional diesel fuel using a MCW double decker Metrobus, powered by a Gardner 6LXB engine reconditioned to the manufacturer's "Low NOx Green" specification (details of this specification are given in Annex 2). The two series of emission tests were conducted during November and December 1992, at the start of the trial, and in March and April 1993 after a period of continuous operation using RME fuel. In both cases, tests were also carried out with the same bus using conventional fuel so that a comparison between emissions for the two fuel types could be made. This report presents the results of the emission testing. (A)

  • Corporate Authors:


    Crowthorne House, Nine Mile Ride
    Wokingham, Berkshire  United Kingdom  RG40 3GA
  • Authors:
    • HICKMAN, A J
  • Publication Date: 1993-9


  • English

Media Info

  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00715971
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Jan 31 1996 12:00AM