Frontal airbag unit and motor vehicle
AssigneeAutoliv Development AB
InventorLaurent Hellot
Life of this patent
Estimating the term…
Abstract
A frontal airbag unit adapted for being mounted above the person to be protected is described. It comprises an inflator (24) and an airbag consisting of a first outer skin (10) enclosing a filling and support chamber (20) and a second outer skin (30) enclosing a protection chamber (40). In order simplify the production process and in order to provide a good support for the deployed second outer skin (30) the first outer skin (10) is comprised of a first layer (11) and a second layer (12) being connected to one another by means of a first peripheral connection such that the filling and support chamber (20) is relatively flat.
Claims16
A frontal airbag unit adapted for being mounted above a person to be protected, with an inflator and an airbag, said airbag comprising:
- a first outer skin extending in a first direction from an inflator-side first end to a second end when in its deployed state, and defining a filling and support chamber being in fluid communication with the inflator, said filling and support chamber having a first maximum thickness;
- and
- a second outer skin comprising an impact surface and defining a protection chamber being in fluid communication with the filling and support chamber via at least one overflow opening,
- wherein the first outer skin is comprised of a first layer and a second layer, said first layer and said second layer being connected to one another by a first peripheral connection,
- wherein a length of the first outer skin between the first end and the second end exceeds the first maximum thickness of the filling and support chamber by at least a factor of 4,
- wherein the at least one overflow opening is located at the first laver between the first end and the second end, and
- wherein a distance between the at least one overflow opening and the second end is at least a fifth of the length of the first outer skin.
A motor vehicle having a roof, a windscreen extending from said roof and a frontal airbag unit with an inflator and an airbag, said airbag comprising:
- a first outer skin extending in a first direction from an inflator-side first end to a second end when in its deployed state, and defining a filling and support chamber being in fluid communication with the inflator, said filling and support chamber having a first maximum thickness;
- and
- a second outer skin comprising an impact surface and defining a protection chamber being in fluid communication with the filling and support chamber via at least one overflow opening,
- wherein the first outer skin is comprised of a first layer and a second layer, said first layer and said second layer being connected to one another by a first peripheral connection,
- wherein a length of the first outer skin between the first end and the second end exceeds the first maximum thickness of the filling and support chamber by at least a factor of 4,
- wherein the filling and support chamber extends parallel to the windscreen when the airbag is fully deployed,
- wherein the filling and support chamber is divided into at least two sub-chambers extending in the first direction by a dividing connection connecting the first laver and the second layer, and
- wherein two dividing connections are present such that the filling and support chamber is divided into two lateral sub-chambers and one central sub-chamber.
Dependencies are inferred from the claim text.