VEHICLE FUEL ECONOMY: EFFECTS OF AERODYNAMICS AND GEARING

The five-part report examines the developments in vehicle design aimed at making vehicles more economical. Three of the parts deal with ways of reducing the energy requirement at a given road speed by aerodynamic changes to the body and cooling system, while the other two illustrate the gains in economy obtained by using higher gear-ratios so that the engines operate at more favourable load factors at slower engine speeds and thus have better fuel consumption. The interrelation occurs because changes of gearing should be an integral part of obtaining the maximum benefit from aerodynamic improvements. An example of this is given in the typical engine performance chart which presents typical specific fuel consumption contours for an engine. /TRRL/

• Corporate Authors:

  Motor Industry Research Association

  Watling Street
  Nuneaton CV10 0TU, Warwickshire,   England 
• Publication Date: 1976-2

Language

• English

Media Info

• Features: Figures; Tables;
• Pagination: 113 p.

Subject/Index Terms

• TRT Terms: Aerodynamics; Cooling; Design; Energy; Fuel consumption; Gears; Load factor; Operating costs; Speed; Transmissions; Vehicle design; Vehicles
• Old TRIS Terms: Body
• ITRD Terms: 5492: Aerodynamics; 1057: Air transport network; 9011: Design (overall design); 232: Fuel consumption; 221: Operating costs; 5408: Speed; 1333: Transmission (veh)
• Subject Areas: Design; Energy; Highways; Safety and Human Factors; Vehicles and Equipment; I96: Vehicle Operating Costs;

Filing Info

• Accession Number: 00157343
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS
• Created Date: Oct 13 1977 12:00AM