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Simplification of the Variable Vent Structure of the Passenger Airbag by Applying a Slit-Type Vent
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2015 by SAE International in United States
Annotation ability available
The reaction force of a traditional passenger airbag tends to reduce after the initial inflation and before contact with the occupant, since the vent structure discharging the internal gas is always open. A potential means to prevent this drop in the airbag reaction force includes the addition of a variable vent structure which keeps the vent hole closed until occupant contact to maintain the airbag internal pressure and then opens to vent gas after the contact. However, variable vent structures may involve issues from a complicated structure due to additional parts in its construction.
The goal of this study was to develop a simplified variable vent structure. A slit-type vent structure was investigated. This structure incorporates no additional parts to a conventional airbag with a hole-type vent. Static deployment tests and impactor tests were conducted to measure the effect of the slit-type vent structure and to compare it with the conventional airbag. Additionally, the correlation between slit length/depth and the airbag reaction force was investigated by performing impactor tests to clarify the potential contribution of this vent structure to the optimization of the overall restraint system. The results of this study showed that a simple variable vent concept was achieved with the slit type vent structure. It was also found that the slit length and depth correlates with the airbag reaction force.
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CitationTorikai, K., Higuchi, H., and Seki, K., "Simplification of the Variable Vent Structure of the Passenger Airbag by Applying a Slit-Type Vent," SAE Technical Paper 2015-01-1455, 2015, https://doi.org/10.4271/2015-01-1455.
- Buchanan Eric S. 1997 Pressure vent for air bag cushion US Patent 5603526
- Williams Jeffrey D. 2009 Airbag cushion with diffuser with cinch tube to vent gas for out-of-position conditions US Patent US7614654 B2
- Chida Yusuke et al. 2009 Airbag apparatus US Patent US 7497467 B2
- Takizawa Satoshi et al. 1993 Airbag apparatus Japan utility model bulletin 8309-3D