This is not my field, so this information comes from articles I’ve read over the years: when they first introduced this functionality, it was explained plainly as: your kinetic energy + the kinetic energy of the expanding airbag > your kinetic energy + negative energy absorbed by the deflating airbag.
Nowadays I gather that things are more complicated, but still, the status of your seatbelt is part of the data your car uses to choose a protection strategy for you. Fooling it with devices like this goes against your own interest twice.
This is not my field, so this information comes from articles I’ve read over the years: when they first introduced this functionality, it was explained plainly as: your kinetic energy + the kinetic energy of the expanding airbag > your kinetic energy + negative energy absorbed by the deflating airbag.
Nowadays I gather that things are more complicated, but still, the status of your seatbelt is part of the data your car uses to choose a protection strategy for you. Fooling it with devices like this goes against your own interest twice.