This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental Analysis of Aspirating Airbag Units
Technical Paper
1999-01-0436
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Aspirating airbag modules are unique from other designs in that the gas entering the airbag is a mixture of inflator-delivered gas and ambient-temperature air entrained from the atmosphere surrounding the module. Today's sophisticated computer simulations of an airbag deployment typically require as input the mass-flow rate, chemical composition and thermal history of the gas exiting the canister and entering the airbag. While the mass-flow rate and temperature of the inflator-delivered gas can be obtained from a standard tank test, information on air entrainment into an aspirated canister is limited. The purpose of this study is to provide quantitative information about the aspirated mass-flow rate during airbag deployment. Pressure and velocity measurements are combined with high-speed photography in order to gain further insight into the relationship between the canister pressure, the rate of cabin-air entrainment and the airbag deployment. Fully instrumented, production level aspirating airbag modules serve as the principal test device.
Authors
Citation
Green, P., Yu, C., Butler, P., Chen, L. et al., "Experimental Analysis of Aspirating Airbag Units," SAE Technical Paper 1999-01-0436, 1999, https://doi.org/10.4271/1999-01-0436.Also In
References
- Butler, P. B. Kang, J. Krier, H. “Modeling and Numerical Simulation of the Internal Thermo-chemistry of an Automotive Airbag Inflator,” Progress in Energy and Combustion-Science 19 365 382 1993
- Butler, P. B. Kang, J. Krier, H. “Modeling Pyrotechnic Combustion in an Automotive Airbag Inflator,” 5th International-Congress of the Groupe de Travail de Pyrotechnie France June 1993
- Butler, P. B. Kang, J. Krier, H. “Numerical Simulation of a Pre-Pressurized Pyrotechnic Automotive Airbag Inflator,” 5th International Congress of the Groupe de Travail de Pyrotechnie France June 1993
- Berger, J. M. Butler, P. B. “Equilibrium Analysis of Three Classes of Automotive Airbag Inflator Propellants,” Combustion Science and Technology 104 1-3 93 114 1995
- Blomquist, H. Green, P.W. Freesmeier, J.J. Butler, P.B. Krier, H. “Modeling Heated-Gas Airbag Inflator,” Proceedings of Airbag 2000 Conference Karlshrue, Germany November 1996
- Wang, J. T. Nefske, D. J. “A New CAL3D Airbag Inflation Model,” SAE Transactions, Paper No. 880654 February 1988
- Wang, J. T. “Recent Advances in Modeling of Pyrotechnic Inflators for Inflatable Restraint Systems,” ASME Publication 106 13 89 93 November 1989
- Wang, J. T. “Are Tank Pressure Curves Sufficient to Discriminate Airbag Inflators?,” SAE Transaction, Paper No. 910808 February 1991
- Kang, J. Wang, J. T. “ISP-An Airbag Inflator Simulation Program,” ASME Publication 230 41 163 189 November 1998
- Lee, Y. G. Yu, C. S. Green, P. W. Chen, L.-D. Butler, P. B. “A Study of Aspiration Effects In Reduced-Scale Model Airbag Modules,” SAE- 982324 , SAE Publication No. P-335 57 64 1998