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Research on Method of Evaluation of Energy in Gas Generators Using Variable Volume Tank Pressure Measurement Device

Article of Honda R&D Technical Review Vol.16 No.2


To date, fixed volume tank pressure measurement devices have been employed in evaluation of the performance of the gas generators (inflators) used in airbags, etc. However, these measurement devices cannot be used to accurately gauge inflator characteristics as the volume changes. This research project therefore built a variable volume tank pressure measurement device(3) to enable measurement data to be obtained as internal volume changes with increasing tank pressure. This device was used in tests, and measured values were input into a predictive equation to define an index (inflator work) for the evaluation of inflator performance. The new measurement device has made it possible to evaluate energy in an inflator and has enabled the development of a new performance evaluation index (inflator work) and method.


(1) Wang, J. T.: Are Tank Pressure Curves Sufficient Discriminate Airbag Inflators, SAE Paper 910808
(2) Hussey, B., Rink, M. L.: Predictive Techniques for Airbag Inflator Exit Properties, SAE Paper 950344,
(3) JP, Patent Application No. 2004-175413

Author (organization or company)

Daiei TONOOKA(Tochigi R&D Center)、Takeshi KAI(Tochigi R&D Center)、Yoshihiko MORITA(Tochigi R&D Center)

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