Development of a Restraint System for Rear-Facing Car Seats-Reference-Cited by-同舟云学术

Development of a Restraint System for Rear-Facing Car Seats

Published:2023-12-08 Issue:12 Volume:11 Page:1076
ISSN:2075-1702
Container-title:Machines
language:en
Short-container-title:Machines

Author:

Yavuz Samet¹^ORCID,Himmetoglu Selcuk²^ORCID

Affiliation:

1. Institute of Science, Hacettepe University, Beytepe, Ankara 06800, Türkiye

2. Mechanical Engineering Department, Hacettepe University, Beytepe, Ankara 06800, Türkiye

Abstract

In self-driving vehicles, passengers can set their seats in an unconventional seating position, such as rear-facing. Sitting in such an orientation can increase the risk of whiplash in the head-and-neck system in a frontal impact, as frontal crashes usually have higher severities compared with rear-end crashes. This paper shows that a forward-facing front seat optimised for rear-impact protection needs to be redesigned to be used as a rear-facing seat. In the second and main part of this paper, a restraint system for rear-facing car seats is developed, and frontal impact simulations with 64 km/h of delta-V are used to evaluate its performance. The designed seating system comprises two rigid torso plates, a fixed recliner and an energy absorber under the seat pan. Without using the developed restraint system, the 50th percentile male human model is exposed to neck shear forces exceeding 600 N. With the developed restraint system, neck shear forces are less than 350 N in frontal impacts with 64 km/h of delta-V. Apart from whiplash, the risk of head, chest, lower extremity and lower back injuries are also evaluated. The results confirm that the developed restraint system successfully protects the occupant since all assessment criteria values are lower than the injury assessment reference values.

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Industrial and Manufacturing Engineering,Control and Optimization,Mechanical Engineering,Computer Science (miscellaneous),Control and Systems Engineering

Link

https://www.mdpi.com/2075-1702/11/12/1076/pdf

Reference55 articles.

1. Himmetoğlu, S. (2022, January 5–7). Introduction of a Protection System for Rear-Facing Seats in Autonomous Car Crashes. Proceedings of the 26th International Scientific Conference Transport Means, Kaunas, Lithuania.

2. Gutsche, A.J., Tomasch, E., Sinz, W., Levallois, I., Alonso, S., Lemmen, P., Linder, A., and Steffan, H. (2013, January 11–13). Improve Assessment and Enhance Safety for the Evaluation of Whiplash Protection Systems Addressing Male and Female Occupants in Different Seat Configurations by Introducing Virtual Methods in Consumer Tests. Proceedings of the 2013 Ircobi Conference, Göteborg, Sweden.

3. Jakobsson, L., Östh, J., and Bohman, K. (2021, January 8–10). Rear-end Impact Assessment Expanded with Pre-Impact Posture Variations. Proceedings of the 2021 Ircobi Conference, Online.

4. Rear-Seat occupant demographics in rear impacts;Parenteau;Traffic Inj. Prev.,2021

5. EuroNCAP (2021). European New Car Assessment Programme–The Dynamic Assessment of Car Seats for Neck Injury Protection Testing Protocol, EuroNCAP. Version 4.1.1.