Tandem antilock makes use of a single controller for a pair of axles in tandem layout. Two feasible wheel-sensing options exist: one uses a sensor at each of the four axle-ends, the other mounts sensors only on that axle more prone to lock. And therein lies the problem -- predicting which axle of a tandem pair will give better antilock warning. Engineers of the Bendix Heacy Vehicle Systems Groups analyzed two popular types of suspension, four-spring and walking beam, on a tractor and nonarticulated truck, respectively. Results indicate that four-spring braking behavior may be compatible with single-axle sensing. However, the walking beam's uniform loading in deceleration seems to require four-wheel sensing for full antilock protection. In operation, incipient lockup of any wheel would be followed by reduction of that axle's air brake pressure. The latter would be allowed to increase, once wheels on that axle resume normal rotation.

Media Info

  • Pagination: p. 38-43
  • Serial:
    • Automotive Engineering
    • Volume: 86
    • Issue Number: 1
    • Publisher: Society of Automotive Engineers (SAE)
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00178850
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Sep 27 1978 12:00AM