| 摘要 |
A side airbag apparatus includes an inflator assembly and an airbag. The airbag includes an upper chamber and a lower chamber, which communicate with each other via a communication portion. In the side airbag apparatus, gas is discharged from the inflator assembly in response to an impact from the side of a vehicle. The gas causes the lower chamber to be inflated and deployed beside the occupant with the internal pressure higher than that of the upper chamber. The side airbag apparatus further includes an auxiliary inflation section, which is part of the airbag and is inflated by gas around the communication portion. In the inflation process of the airbag, when the auxiliary inflation section starts inflating, the flow passage area of the communication portion is reduced, thereby suppressing the flow of gas in the communication portion.
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