One of the safety measures being reviewed by the EEC is the provision of under-run protection in the event of a car colliding with the rear end of a commercial vehicle. A solution to this problem developed by Quinton Hazell comprises an under-run protection bumper bar on pendant arms pivoted beneath the rear end of a truck or trailer chassis frame. The bumper bar is able to retract under impact for a distance of up to 400 mm against the resistance offered by two hydraulic energy absorbers arranged co-axially with coil compression springs. As well as preventing injury to car occupants the unit also prevents damage to vehicle rear lamp clusters due to minor impacts when reversing. /TRRL/

  • Availability:
  • Corporate Authors:

    Institution of Mechanical Engineers

    1 Birdcage Walk
    London SW1H 9JJ,   England 
  • Publication Date: 1977-12

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 44-47
  • Serial:
    • Volume: 2
    • Issue Number: 6
    • Publisher: Institution of Mechanical Engineers
    • ISSN: 0307-6490

Subject/Index Terms

Filing Info

  • Accession Number: 00174176
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jun 28 1978 12:00AM