Evaluation of the Protective Performance of a Novel Restraint System for Highly Automated Vehicles (HAV)

As automated driving further penetrates the market, opportunities continue to arise for new vehicle interior designs, and new seating positions might be allowed. Flexible seating with a wider range of positions will require new restraint systems, independent of the steering wheel or instrument panel. The aim of this study was to evaluate a novel seat-integrated restraint system created for future potential seating position, compared to the current conventional restraint system in forward-facing seat condition. The seat-integrated restraint system was evaluated using a virtual simulation model correlated to physical sled tests. The CAE model included a generic seat, the seat integrated belt system with a 2kN load limiter, and the new Dual Shoulder Airbag system (DSA). The DSA was mounted to the seat back on both sides of the seat. The DSA was also connected below the seat pan to raise the occupant’s pelvis-thigh area during a crash, to avoid submarining in the reclined position. For reference, a standard system (3-point 4 kN load limiter belt and driver airbag) was used. Occupant injury assessment reference values (IARV) were evaluated using the AM50_THOR, AF05_Hybrid III, and AM95_Hybrid III models and compared to IARVs from the current and new proposed New Car Assessment program in the U.S (US NCAP). The IARVs compared were HIC15, BrIC, Nij and Chest deflection. The load cases evaluated were full rigid-barrier frontal crash (FRB) and NHTSA Oblique Impact (NOI), with crash pulses representing a mid-size sedan. The occupant protection was evaluated for the standard seating position (23 degrees from vertical) as well as for a reclined position (45 degrees from vertical). The new restraint system resulted in lower IARVs than the reference system in every case except HIC15 and Nij in the NOI condition. A comparison of the standard and reclined positions revealed that every IARV was increased in the latter. No submarining occurred for any of the restraint systems. The new proposed airbag system has the potential to offer equivalent or lower IARVs compared to the reference system in frontal crash mode (forward-facing seat condition).

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 15p
  • Monograph Title: 26th International Technical Conference on the Enhanced Safety of Vehicles (ESV): Enabling a Safer Tomorrow

Subject/Index Terms

Filing Info

  • Accession Number: 01765026
  • Record Type: Publication
  • Report/Paper Numbers: 19-0321
  • Files: TRIS, ATRI, USDOT
  • Created Date: Dec 30 2020 3:48PM