The emissions of restraint systems - gases, dust and acoustics - are quantified in the industry using widely accepted methods like AKZV01, SAEJ1794 and USCAR. This paper reports the background of the used analytical methods and comments the given narrow specifications based on 8 years experience of emission test. The influence on the gas analysis for the example of NO(x) are outlined. Especially for NO and NO2 the experimental conditions for ambient pressure, humidity and type of tank should meet the given specifications in the methods. Particles generated by deployment are an important emission concerning passengers. This dust is an emission of most gas generators and has to be investigated according to the given methods. A standard procedure for the measurement of the particle size distribution is using an Andersen impactor. Element analysis of the collected dust has to be done using an ICP, AAS or other techniques, always requiring a certain mass of sample. Acoustic measurements in airbag development are relatively new. The methods for emission tests like AKZV01 or SAEJ247 define a detailed method for the measurement using special equipment to record highly dynamic impulse noise.
Airbag emissions: The quantification of gases, dust and acoustics in practice
Airbag-Emissionen: Die Quantifizierung von Gas-, Staub- und Geräuschemissionen
8 Seiten, 7 Bilder
Aufsatz (Konferenz)
Englisch
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