Accident studies show that frontal collisions, both as regards the number of people killed and those seriously-injured, are by far the type of crash with the most serious consequences. In order to improve this situation, it is necessary to ensure that the means used to restrain occupants work as efficiently as possible, whilst preserving the occupant compartment and thus by eliminating intrusion on the occupant restrained by seat-belts and pretensioners. In order to reduce loads on occupants restrained by seat-belts, it has become necessary to work on an optimized limitation of the restraining forces, while taking account of the broadest possible population, especially elderly people. A first step in this reduction was taken in 1995 with the introduction of the first-generation Programmed Restraint System (PRS), with a seat-belt force threshold of 6 kN; thirty seven frontal accident cases involving this type of restraint were investigated. The corresponding data, crash severities and occupant injuries, are reported in this paper. Analysis of these data combined with findings from the University of Heidelberg/NHTSA study, shows that it is necessary to go a step further by reducing the shoulder belt force to 4 kN. As this objective cannot be achieved with a standard restraint system, it was necessary to redesign the airbag and its operating mode, that is, a new seat-belt + airbag combination called PRS II. This paper summarizes the data obtained with the 6 kN load limiter restraint in real-world collisions. A description of the new system is given and its performance in offset crash situation with respect to a European standard belt + airbag system is discussed. The paper provides data on the validation of the PRS II in various frontal collisions and static out-of-position (OOP) tests.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    The programmed restraint system - a lesson from accidentology


    Additional title:

    Das programmierte Rückhaltesystem - Eine Lektion über Unfallforschung


    Contributors:
    Bendjellal, F. (author) / Walfisch, G. (author) / Steyer, C. (author) / Ventre, P. (author) / Bruno, J.Y.F. (author) / Trosseille, X. (author) / Lassau, J.P. (author)


    Publication date :

    1997


    Size :

    15 Seiten, 14 Bilder, 5 Tabellen, 10 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    The Programmed Restraint System - A Lesson from Accidentology

    Bendjellal, F. / Walfisch, G. / Steyer, C. et al. | British Library Conference Proceedings | 1997


    The Programmed Restraint System - A Lesson from Accidentology

    Steyer, Christian / Bendjellal, Farid / Walfisch, Gilbert et al. | SAE Technical Papers | 1997


    The programmed restraint system - a lesson from accidentology

    Bendjellal,F. / Walfisch,G. / Steyer,C. et al. | Automotive engineering | 1997


    Restraint Systems and Restraint System Methods

    SYRCLE MIKE / WELLINGTON ERIC | European Patent Office | 2023

    Free access

    Restraint Systems and Restraint System Methods

    SYRCLE MIKE / WELLINGTON ERIC | European Patent Office | 2021

    Free access