FIVE SPEED GEARBOX ENERGY EFFICIENCY. ENERGY EFFICIENCY IN LAND TRANSPORT. PROCEEDINGS OF A SEMINAR ORGANISED BY THE COMMISSION OF THE EUROPEAN COMMUNITIES, DIRECTORATE GENERAL FOR ENERGY, LUXEMBOURG, MAY 16-18, 1988

The objective of this study was to ascertain whether the 5 speed gearbox (5sg) used less fuel than the 4 speed gearbox (4sg). The experiment was carried out with 10 non professional drivers, using 6 car models which were available with both 5 and 4 speed transmission, on a route which combined urban, ringroad and motorway sections. Each driver completed the circuit 5 times with each version of the transmission type. Vehicle and engine speeds and fuel consumptions were monitored, and use of the various gears was derived from vehicle and engine speeds. Analyses were performed for each road type and for the whole journey. The results show little difference in fuel economy between the two gearboxes. Fuel economy improvements achieved on fastest sections are counterpoised by increase of vehicle speed, or by over-consumptions on urban sections. The inadequate or extended use of the 4th gear on the 5 speed gearbox is certainly responsible for the high level of some mean engine speeds in city sections, in comparison with those of the 4 speed gearbox. Results with recently designed 4 speed gearboxes, hence with high gear ratios, already allow considerable economy which has not been improved with the 5 speed version, even by the most sparing drivers. For the covering abstract of the conference see IRRD 824263.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/1851663630
• Corporate Authors:

  Elsevier Science Publishers

  Crown House, Linton Road
  Barking, Essex IG11 8JU,   England 
• Authors:
  • PILLOT, D
  • DELSEY, J
• Publication Date: 1989

Language

• English

Media Info

• Pagination: p. 289-97
• Serial:
  • Publication of: Commission of the European Communities
  • Publisher: Commission of the European Communities

Subject/Index Terms

• TRT Terms: Behavior; Conferences; Design; Driving; Energy conservation; Fuel consumption; Transmissions
• Subject Areas: Design; Energy; Environment;

Filing Info

• Accession Number: 00498043
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 1-85166-363-0
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM