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Automotive Engineering ›› 2024, Vol. 46 ›› Issue (12): 2241-2256.doi: 10.19562/j.chinasae.qcgc.2024.ep.004

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A Review of Reclined Occupant Crash Injuries and Impact Protection

Wenxuan Shen1,2,Rui Dai1,2,Puyuan Tan1,2,Qing Zhou1,2()   

  1. 1.School of Vehicle and Mobility,Tsinghua University,Beijing 100084
    2.Tsinghua University,State Key Laboratory of Intelligent Green Vehicle and Mobility,Beijing 100084
  • Received:2024-04-15 Revised:2024-05-21 Online:2024-12-25 Published:2024-12-20
  • Contact: Qing Zhou E-mail:zhouqing@tsinghua.edu.cn

Abstract:

With the development of intelligent vehicles and autonomous driving technologies, zero-gravity seat, with occupant comfort as core function, has been equipped in some vehicles. Compared to upright seating, reclined occupants face a higher risk of injury in collision, making the development of crash safety solutions imminent. In this paper, a review of the current research status and development trends regarding the crash safety of reclined occupants is conducted, focusing on injury mechanism, restraint systems, and research tools. The findings are summarized as follows: (1) Injury patterns for reclined occupants differ from those for upright occupants, and the injury mechanism at typical sites such as the lumbar spine and the iliac crest have not been fully clarified. (2) Traditional restraint systems with three-point seat belts as the core, even after improvement and optimization, is still difficult to provide effective overall protection for reclined occupants. Development of new protective means that can reasonably balance submarine and spinal injuries under the integrated active-passive safety system is a key issue in crash protection research for reclined occupants. (3) Crash dummies and human body models (HBMs), as the primary research and evaluation tools, need to improve their usability and bio-fidelity for reclined conditions.

Key words: intelligent vehicles, zero-gravity seat, reclined occupant, impact injuries, crash protection means