Patent ID: 7328140
Filing Date: 2008-02-05
Classification: B60R

Abstract:
1. A method for designing a passenger-side air bag door for an invisible airbag for a passenger-side seat of a vehicle, comprising: determining levels of a noise factor depending on a process condition of laser scoring for forming a tearseam on an inner surface of an instrument panel; determining control factors and levels of each control factor that affect a stress distribution and deformation rate of the tearseam; arranging combinations comprising levels of the control factors according to an experimental design; inputting each noise factor to each combination and measuring a minimum impulse ‘X’ that is able to tear the tearseam of the passenger-side air bag door for operation of the passenger-side airbag, and a maximum impulse ‘Z’ that is unable to tear the tearseam of the passenger-side air bag door in a case of a head or body impact; selecting a level of each control factor based on the measured minimum impulse ‘X’ and the measured maximum impulse ‘Z’; and designing and manufacturing the tearseam of the passenger-side air bag door to tear based on the level of each control factor, wherein selecting the level of each control factor comprises: wherein