In an automotive collision where the velocity of a car is rapidly changed, an empty space between the occupant and the interior of the vehicle will result in a difference in velocity between the occupant and the car in the direction of travel. The decelaration of the vehicle and the distance of unrestrained relative motion will determine the occupants impact velocity against the vehicle interior at the end of travel, as shown in Figure 1. Since such impacts often result in occupant injury, restraint systems are used to control this relative motion. The basic principle for such systems is the interposition of load-carrying, deformable elements between the vehicle interior and the occupant. In some restraint systems these elements are in contact with the occupant's body already during normal driving. This type of restraint system does to some extent control the occupant's posture and thereby also the spatial relation between the human body and the restraint system during the collision sequence. One characteristic of the airbag restraint system is that the deformable element- the airbag itself- is not inflated during normal driving, but remains stored, usually in the instrument panel. This is an important characteristic of this system, because it leaves a seated occupant more freedom to move and change position than do most other systems. In order to obtain this advantage, however, the system must be activated at an early stage of a collision. Thus the airbag must inflate and be placed in position between the vehicle interior and the occupant very quickly. The spatial relation between the occupant and the restraint cannot be controlled in the same manner in airbag restraint systems as it can in most other systems.

  • Corporate Authors:

    American Association for Automotive Medicine

    801 Green Bay Road
    Lake Bluff, IL  United States  60044

    American Association for Automotive Medicine

    1211 West 22nd Street
    Oak Brook, IL  United States  60523
  • Authors:
    • ALDMAN, B
    • Andersson, A
    • Saxmark, O
  • Conference:
  • Publication Date: 1974

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 15 p.
  • Serial:
    • Volume: 18

Subject/Index Terms

Filing Info

  • Accession Number: 00081240
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Contract Numbers: DOT-HS-047-1-063, DOT-HS-031-2-303, DOT-FH-11-7526
  • Files: HSL, TRIS
  • Created Date: Mar 26 1983 12:00AM