WIRY BRAKES: MORE BRAIN THAN BRAWN

This article discusses some actual and potential developments of 'intelligent' braking systems for road vehicles. Almost every brake manufacturer is working on going beyond the limitations of anti-lock systems by having automatically controlled independent braking on each wheel. The first such system in production is the Electronic Stability Programme (ESP) of Bosch and Mercedes-Benz. The Lucas Electronic Actuation System (EAS) detects the rate of brake pressure increase and signals an electronic control unit. It can thus recognise an emergency when a driver brakes sharply, but also restores full braking automatically if the driver then eases braking pressure enough to stop anti-lock cycling; accident studies show that drivers often behave in this way. The next large step in car brake development is 'brake-by-wire', which basically replaces the throttle cable or governor control cable by an accelerator pedal movement sensor, an electric cable, a transducer on the intake manifold, and an engine management system. Many cars now use such a system. The second generation proposal, genuine brake-by-wire using no hydraulics, is much more interesting, and will require sophisticated electronics and software. It will lead to better control and fuel economy, and less friction and noise.

  • Availability:
  • Corporate Authors:

    Institute of Road Transport Engineeers

    1 Cromwell Place
    London SW1 25F,   England 
  • Authors:
    • SCARLETT, M
  • Publication Date: 1996-7

Language

  • English

Media Info

  • Pagination: p. 30-2
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00729191
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM