Motor vehicles – With means for promoting safety of vehicle – its occupant or... – Responsive to engagement of portion of perimeter of vehicle...
Reexamination Certificate
2004-08-02
2008-12-09
Culbreth, Eric (Department: 3616)
Motor vehicles
With means for promoting safety of vehicle, its occupant or...
Responsive to engagement of portion of perimeter of vehicle...
C180S282000, C280S735000
Reexamination Certificate
active
07461717
ABSTRACT:
An activation control apparatus controls activation of an airbag unit. An electronic control unit detects a floor deceleration Gf and front decelerations GI, Gr from signals output from a floor sensor and front sensors. Also, the electronic control unit calculates a velocity change Vn from the floor deceleration Gf, and determines the severity of a collision. Further, the electronic control unit determines the state of a symmetric flag FRG through comparison between the front decelerations GI, Gr and the value of a front determination map boundary, serving as a front threshold variation pattern and through comparison between the floor deceleration Gf and the value of a low or high map boundary, serving as an activation threshold variation pattern. Then, on the basis of results of the severity determination and the state of the symmetric flag FRG, the electronic control unit determines a delay time in relation to the activation of the airbag unit. An airbag is expanded and deployed on the basis of the delay time.
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Iyoda Motomi
Miyata Yujiro
Culbreth Eric
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
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