The US Department of Energy sponsored several student engineering competitions in 1993 that provided useful information on electric and hybrid vehicles. The electrical energy usage from these competitions has been recorded with a custom-built digital motor installed in every vehicle and used under controlled conditions. When combined with other factors, such as vehicle mass, speed, distance traveled, battery type, and the type of components, this information provides useful insight into the performance characteristics of electrics and hybrids. All the vehicles tested were either electric vehicles or hybrid vehicles in electric-only mode, and had an average energy economy of 7.0 km/kwh. Based on the performance of the "ground-up" hybrid electric vehicles in the 1993 Hybrid Electric Vehicle Challenge, data revealed a 1 km/kwh energy economy benefit for every 133 kg decrease in vehicle mass. By running all the electric vehicles at a competition in Atlanta at several different constant speeds, the effects of rolling resistance and aerodynamic drag were evaluated. On average, these vehicles were 32% more energy efficient at 40 km/h than at 72 km/h. The results of the competition data analysis confirm that these engineering competitions not only provide an educational experience for the students, but also show technology performance and improvements in electric and hybrid vehicles by setting benchmarks and revealing trends.

  • Supplemental Notes:
    • Society of Automotive Engineers (SAE) congress and exposition, Detroit, MI, 28 Feb - 3 Mar 1994. Sponsored by Department of Energy, Washington, DC.
  • Corporate Authors:

    National Renewable Energy Laboratory

    1617 Cole Boulevard
    Golden, CO  United States  80401
  • Authors:
    • Wipke, K B
    • Hill, N
    • Larsen, R P
  • Publication Date: 1994-1


  • English

Media Info

  • Pagination: 13 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00669177
  • Record Type: Publication
  • Report/Paper Numbers: NREL-TP-473-6227, CONF-940242-1
  • Files: TRIS
  • Created Date: Nov 28 1994 12:00AM