Citation

Torii N, Oono M, Shimizu Y, Nakashima A, Tanigawa Y, Sasano T, Nagura H. Trans. Soc. Automot. Eng. Jpn. 2016; 47(4): 949-954.

Copyright

(Copyright © 2016, Society of Automotive Engineers of Japan)

DOI

10.11351/jsaeronbun.47.949

PMID

unavailable

Abstract

There are curtain shield air bag (CSA) and a side air bag as a main restriction device protecting an occupant at the time of a side collision. Therefore, this article studies CSA. CSA is a restriction device with two functions mainly. At first functions, CSA has a function to reduce the head injury of the occupant at the time of a primary collision. Therefore, it is desirable for CSA to be able to restrict the head by weak power for a long time. When the head is restricted in CSA, CSA is pushed on the head, therefore the volume of CSA decreases, the internal pressure of CSA increases and the head reaction force increase. Therefore, it is necessary to lower the CSA internal pressure during head restriction to avoid it. Therefore, the representative structure to lower internal pressure is a vent hall. At second functions, CSA has a function to reduce the possibility that an occupant is released outside a car. Therefore, it is necessary for CSA to maintain the internal pressure for a certain period of time. However, the second functions contradict the first. Therefore, in this article, CSA was based on structure without the vent hall. Achievement means to lower the reaction force at the time of the primary collision is to adopt structure to divert the gas of the chamber that the head is restricted to other chambers. With the main subject, two structures are considered. The first study is a method to gain the number of the duct. The second study of two pipe eyes is a method to increase the size of the duct. Therefore, it is the second study to have been effective. At last, it was inspected why it turned out such with the theory.

Language: ja

Keywords

curtain shield airbag; delay chamber; gas flow; Safety; side impact