Anti-lock systems applied to air-braked vehicles often have a slow cyclic response time. The latest form of the skidchek gx, using a memory controlled relay valve, gives shorter stopping distances and smoother braking by keeping the tyres closer to the skidding point. Tests have shown that the highest braking force coefficient is at 10 to 20 per cent slip, and that cornering grip reduces to zero in the wheel-locked condition. Girling have modified the relay valve so that the electronic control senses over-rapid deceleration of a wheel, giving a variable duration of solenoid energisation proportional to the slipperiness of the surface. A perforated disc fitted to a wheel hub and a small sensor provide the signal input for the electronic controller. If the anti-lock system becomes faulty, a warning light informs the driver and normal braking becomes operative. The author describes a demonstration of the skidchek system showing that the best performance is achieved when all wheels are fitted. (TRRL)

  • Availability:
  • Corporate Authors:

    Embankment Press Limited

    Building 59, GEC Estate, East Lane
    Wembley, Middlesex HA9 7TQ,   England 
  • Authors:
    • Dalzell, J
  • Publication Date: 1980-9

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 10
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00329663
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: May 21 1981 12:00AM