Experimental Analysis of Aspirating Airbag Units
1999-01-0436
03/01/1999
- Event
- Content
- 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.
- Pages
- 6
- 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.