An account is given of the techniques involved in seat heating based on the paper 'Development, design and application of seat heating systems for passenger cars' by George Shanku of Forsheda, presented at the 1989 Society of Automotive Engineers Conference. Fitted as standard in Sweden since 1972, the use of seat heaters is becoming widespread in Europe on trucks, recreational and agricultural vehicles and office equipment as well as cars. Studies have shown that heat loss from the body to a cold seat can affect the bowels and liver as well as being uncomfortable. Forsheda have recently set up an operation in the UK and details are given of the heating systems manufactured. More complicated than a blanket, over 100 different configurations are available. Details are given of the layers required and the different techniques for fabric and leather. A circuit containing digital components has been found to provide the most accurate temperature control. Control boxes can be made small enough to fit under the seat. Design of the element depends on the area to be heated, seat cover design, cover material and power available. Heat density is monitored with a manikin undergoing bump, squirm, twisting and sliding tests. Production is controlled by computer.

  • Availability:
  • Corporate Authors:

    Morgan-Grampian Limited

    30 Calderwood Street
    London SE18 6QH,   England 
  • Authors:
    • -
  • Publication Date: 1990-3


  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00607135
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM