1998-09-29

Effect of Gas Thermodynamics on the Aggressiveness of Airbag Inflator 982323

In automotive industry, aggressiveness of airbags is associated with the output of inflators, which is often presented by tank pressure. The purpose of this paper is to give an in-depth discussion of the thermodynamics behind the airbag inflator so that we can understand correctly and utilize properly the relationship between inflator power and tank pressure. In this paper, through a more rigorous derivation and a detailed analysis of the tank tests, we not only qualitatively analyze the relationship of inflator power to tank pressure, the heat transfer effect and the gas composition effect, but also we quantify the contribution of these parameters. The numerical algorithm and calculations also have been shown here for the most common types of the inflators, such as azide and non-azide pyrotechnic inflators, stored gas inflators and hybrid inflators to verify the analytic predictions and conclusions.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

An Experimental Investigation of Transient Heat Losses to Tank Wall During the Inflator Tank Test

982326

View Details

TECHNICAL PAPER

Analysis of Airbag Inflation

890192

View Details

TECHNICAL PAPER

Transient Heating of Air Bag Fabrics: Experiment and Modeling

980865

View Details

X