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Airbag development control apparatus

  • US 7,509,196 B2
  • Filed: 10/17/2005
  • Issued: 03/24/2009
  • Est. Priority Date: 11/02/2004
  • Status: Expired due to Fees
First Claim
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1. An airbag development control apparatus for a vehicle, comprising:

  • an acceleration sensor which generates an acceleration signal on collision of the vehicle;

    a plurality of differing signal waveform curves outputted from the acceleration sensor for each differing collision mode;

    a threshold value setter which sets a first threshold value and a second threshold value for the acceleration signal generated by the acceleration sensor, the second threshold value being larger than the first threshold value;

    a time measurement circuit which measures a time period from a point of time in which the acceleration signal, generated at an initial stage of the collision by the acceleration sensor, has reached the first threshold value to a point of time in which the acceleration signal, having reached the first threshold value, reaches the second threshold value; and

    a judgment circuit which compares preliminarily the time period measured by the time measurement circuit with a previously set time before the actual deployment of an airbag, capable of differentiating a degree of acceleration generated at the initial stage of collision to judge a difference of modes of collision, which activates a plurality of inflators to fully develop the airbag when the measured time period by the timer is equal to or less than the previously set time according to the comparison, and which activates one of the inflators to partially develop the airbag when the measured time period by the timer exceeds the previously set time according to the comparison; and

    a structural member having high rigidity spread across the approximate whole width of the vehicle width capable of extinguishing the difference in collision area due to a difference in collision modes so that acceleration speed generated during collision to the structural member having high rigidity can be viewed as a difference in collision speed regardless of the state of collision.

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