This article reviews some of the experience gained with air disc brakes for lorries, and discusses the reasons for the imminent rapid increase in their fitting on lorries and buses. The use of air disc brakes has been increasing gradually since their introduction in 1989. All major European manufacturers either have introduced, or will introduce, such brakes on the front wheel first, but will increasingly be fitting them on both axles. By the year 2000, about 60% of lorries and 70% of buses are expected to fit them on both axles. The factors driving this change are mainly stability and increased safety, but also include: (1) engines of over 500bhp; (2) increasing energy demands of drum brakes; (3) aerodynamics; and (4) 50/50 brake ratio. In practice, concerns about heavy disc brakes have been raised around compatibility, efficiency, even wear, sliding, and installation. Some approaches to meet these concerns are outlined. The present rapid introduction of disc brakes on heavy lorries and buses in Europe has been supported by extensive testing and analysis of brakes, both in rig testing and in the field. Experience with these brakes on production models confirms the results of these tests. Few problems occur with air disc brakes in service, and drivers benefit significantly from the resulting stability, safety, and comfort. For the covering abstract see IRRD 881545.

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    LONDON,   United Kingdom  W2 1XR
  • Authors:
    • Thompson, R
  • Publication Date: 1996


  • English

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Filing Info

  • Accession Number: 00725414
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Sep 26 1996 12:00AM