Improvement of the automatic belt: the possible efficiency of the pyrotechnical retractor.

Author(s)
De-Je-Ammes, M. Biard, R. & Derrien, Y.
Year
Abstract

THE PYROTECHNICAL RETRACTOR IS A NEW DEVICE DESIGNED FOR REDUCING THE ADVERSE "FILM SPOOL" OF THE CLASSICAL RETRACTOR AND FOR IMPROVING THE OCCUPANT-VEHICLE COUPLING IN CASE OF THREE POINT BELT RESTRAINT. THIS STUDY OBJECTIVE IS TO QUANTIFY THE IMPROVEMENTS AFFORDED BY THE PYROTECHNICAL RETRACTOR FROM DYNAMIC TESTS SIMULATING A FRONTAL CRASH AT 50 KM/H WITH A PART 572 DUMMY. IT APPEARS THAT THE WORKING OF THE PYROTECHNICAL RETRACTOR IS ALL THE MORE EFFICIENT AS THE IGNITION TIME IS SHORTER BUT THE RETRACTION PHASE IS HARDLY INFLUENCED BY THE LENGTH OF THE WHEELED WEBBING. THE COMPARISON WITH A USUAL RETRACTOR BELT IN IDENTICAL TEST CONDITIONS SHOWS A SENSITIVE BENEFIT AFFORDED BY THE PYROTECHNICAL RETRACTOR, MAINLY ON THE MAXIMUM DUMMY DISPLACEMENT AND THE HEAD SEVERITY INDEX. MOREOVER, THE PYROTECHNICAL RETRACTOR GIVES A BETTER PROTECTION IN THE CASE OF CLOTHES WEAR OR BELT SLACK. (A) FOR THE COVERING ABSTRACT OF SECTION 5 SEE IRRD 266063. FOR THE COVERING ABSTRACT OF THE CONFERENCE SEE IRRD 266046.

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Publication

Library number
C 51170 (In: B 19320 S [electronic version only]) /91 / IRRD 266070
Source

In: Proceedings of the eighth international technical conference on experimental safety vehicles (ESV), held in Wolfsburg, October 21-24, 1980, p. 379-92 (3 Photos; 10 Figs.; 2 Tbls.; 9 Refs.)

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This publication is one of our other publications, and part of our extensive collection of road safety literature, that also includes the SWOV publications.