The addition of a retarder to supplement the braking system of a passenger service vehicle is intended to act as a safety factor to provide positive and consistent braking. A retarder unit also offers savings in brake lining and drum wear. Three basic designs of retarder are available - electric, hydraulic and the friction type developed by Ferodo as described in the article. The unit can be fitted in a variety of locations in the transmission system, the most common being at mid-bearing on the propellor shaft for hgv's and psv's. The actuating mechanism is controlled by microswitches fitted to brake pedal and in some cases also to the accelerator pedal. The retarder is cut out below 300 rpm so that the vehicle's braking system always has to be used to halt the vehicle.

  • Availability:
  • Corporate Authors:

    Ian Allan Limited

    Terminal House
    Shepperton, Middlesex  England  TW17 8AS
  • Publication Date: 1980-5

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 202-204
  • Serial:
    • BUSES
    • Volume: 31
    • Issue Number: 302
    • Publisher: Ian Allan Publishing, Limited
    • ISSN: 0007-6392

Subject/Index Terms

Filing Info

  • Accession Number: 00319614
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jan 19 1981 12:00AM