The Hobbs Torque Converter has recently been applied to electric vehicles to reduce the cost premium associated with such vehicles. The main claimed advantages of the unit are listed; these include a cost saving through simplification of the motor controls, provision of regenerative braking and a much improved performance which is comparable with that of internal combustion engines. It is suggested that the cost premium associated with electric vehicles in their present state limits their penetration of the motor vehicle market. Apart from the batteries, the electric motor and control equipment are the components for which costs are high. An alternative to sophisticated control equipment has been the use of automatic transmission, but conventional units have high power losses, mainly in the torque converter. The hobbs torque converter has both lower power losses and a higher starting ratio than conventional units, and its application to electric vehicles is described. Experimental vehicles incorporating the unit are claimed here to have a range of 50 miles in towns, a maximum speed of 50 mile/h and are likely to produce savings of around 30 per cent over petrol vehicles. It is also suggested that to bring electric vehicles into the market, the refinements associated with petrol vehicles must be included. /TRRL/

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  • Corporate Authors:

    Institute of Road Transport Engineeers

    1 Cromwell Place
    London SW1 25F,   England 

    Institute of Road Transport Engineeers

    1 Cromwell Place
    London SW1 25F,   England 
  • Authors:
    • Ratcliff, J
  • Publication Date: 1976-5

Media Info

  • Features: Figures;
  • Pagination: p. 18-19
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00138972
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Nov 3 1976 12:00AM