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Activation device for occupant protection apparatus and method for activating the occupant protection apparatus

  • US 8,370,026 B2
  • Filed: 03/04/2010
  • Issued: 02/05/2013
  • Est. Priority Date: 03/06/2009
  • Status: Expired due to Fees
First Claim
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1. An activation device for detecting a collision of a vehicle and activating a protection apparatus for protecting an occupant, the activation device comprising:

  • a front collision detection unit configured todetect a front collision of the vehicle andoutput a front-collision-state activation signal to a protection apparatus related to the front collision so as to activate the protection apparatus related to the front collision when detecting the front collision; and

    a rear collision detection unit configured todetect a rear collision of the vehicle,output a rear-collision-state activation signal to a protection apparatus related to the rear collision so as to activate the protection apparatus related to the rear collision when detecting the rear collision,prohibit output of the rear-collision-state activation signal to the protection apparatus related to rear collision for a first predetermined period when the front collision detection unit detects the front collision, andset a first rear collision threshold and a second rear collision threshold, which are for determining whether the vehicle causes the rear collision, respectively to a third rear collision threshold and a fourth rear collision threshold, which are less than the first rear collision threshold and the second rear collision threshold respectively, in a second predetermined period subsequent to elapse of the first predetermined period;

    whereinthe first and second predetermined periods are shorter than a time period between the front collision and an expected subsequent rear collision.

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