An airbag apparatus for a vehicle includes an inflator, an airbag configured to be expanded and deployed from an instrument panel when supplied with gas so as to be positioned on a front side of an occupant, and a flow guide cloth disposed inside the airbag. The flow guide cloth is configured to be expanded and deployed when the gas flows into the flow guide cloth and discharge the gas into the airbag. A rear end portion is spaced from a rear wall of the airbag. A rear outlet is disposed in the rear end portion and configured to discharge the gas into a rear end portion of the airbag. A front outlet is disposed in a front portion and configured to discharge the gas into a front portion of the airbag. An opening area of the rear outlet is larger than an opening area of the front outlet.

An airbag apparatus for a vehicle includes an inflator, an airbag configured to be expanded and deployed from an instrument panel when supplied with gas so as to be positioned on a front side of an occupant, and a flow guide cloth disposed inside the airbag. The flow guide cloth is configured to be expanded and deployed when the gas flows into the flow guide cloth and discharge the gas into the airbag. A rear end portion is spaced from a rear wall of the airbag. A rear outlet is disposed in the rear end portion and configured to discharge the gas into a rear end portion of the airbag. A front outlet is disposed in a front portion and configured to discharge the gas into a front portion of the airbag. An opening area of the rear outlet is larger than an opening area of the front outlet.

The invention describes an airbag module (10) comprising an airbag (12), an elongate gas generator (14) and a diffusor (16), wherein the gas generator (14) includes an outer housing (18) with outflow openings (20) distributed over the circumference (U) which define an outflow area (22), wherein the outflow area (22) of the gas generator (14) is enclosed by the diffusor (16), wherein the diffusor (16) has a central mount hole (24) into which the outer housing (18) protrudes so that the diffusor (16) circumferentially encloses an axial portion of the outer housing (18) which comprises the outflow area (22), wherein the diffusor (16) includes at least one contact face (26, 26a) and at least two gas guiding surfaces (28a, 28b) on the inner face of the diffusor (16) delimiting the mount hole (24), wherein the contact face (26, 26a) is directly adjacent to the outer housing (18) of the gas generator (14) and the gas guiding surfaces (28a, 28b) are radially spaced apart from the outer housing (18) while forming at least a first collection chamber (30a) and a second collection chamber (30b) into which gas flowing out of the outflow area (22) flows, wherein the first collection chamber (30a) opens into at least one first outlet opening (32a) and the second collection chamber (30b) opens into at least one second outlet opening (32b), wherein the first collection chamber (30a) is separated from the second collection chamber (30b) by the at least one contact face (26) specifically in the form of a separating web (34), wherein the diffusor (16) is completely arranged in an inflatable internal volume of the airbag (12), wherein the airbag (12) comprises at least a first airbag chamber (36a) and a second airbag chamber (36b) which are separated from each other, wherein the gas flowing into the first collection chamber (30a) flows, via the first outlet opening (32a), into the first airbag chamber (36a) of the airbag (12) and the gas flowing into the second collection chamber (30b) flows, via the second outlet opening (32b), into the second airbag chamber (36b) of the airbag (12).

The disclosure relates to a diffusor for a gas generator of an airbag module, comprising a substantially tubular base body with a longitudinal axis, a baffle cap axially connected to the base body at a first end of the diffusor and a connecting device configured at a second end of the diffusor opposite to the first end. At least one outflow opening is formed in an outer wall of the tubular base body such that gas can flow out of an interior of the diffusor substantially in parallel to a longitudinal axis in the direction of the first end and the second end from the diffusor. The baffle cap is free from an outflow opening. The disclosure further relates to a gas generator comprising such a diffusor, as well as an airbag module including such a gas generator. Moreover, a method for manufacturing the diffusor is also proved.

The disclosure relates to a diffusor for a gas generator of an airbag module, comprising a substantially tubular base body with a longitudinal axis, a baffle cap axially connected to the base body at a first end of the diffusor and a connecting device configured at a second end of the diffusor opposite to the first end. At least one outflow opening is formed in an outer wall of the tubular base body such that gas can flow out of an interior of the diffusor substantially in parallel to a longitudinal axis in the direction of the first end and the second end from the diffusor. The baffle cap is free from an outflow opening. The disclosure further relates to a gas generator comprising such a diffusor, as well as an airbag module including such a gas generator. Moreover, a method for manufacturing the diffusor is also proved.

The invention concerns a method for production of a steel tubular product (1), in particular an airbag tubular product, with the following steps: a) provision of a steel tube (2), b) shaping of the steel tube (2) into a pre-geometry (3), wherein in an end region (4), an outer diameter (5) of the steel tube (2) is reduced by axial movement into an outer tool, c) calibration of an inner diameter (7) of the pre-geometry (3), wherein the pre-geometry (3) is still laid in the outer tool, and an inner mandrel, with an outer diameter corresponding to the inner diameter (7) of the calibrated pre-geometry (3), is introduced into the end region (4) of the pre-geometry (3), and the pre-geometry (3) is pressed against the outer tool such that the inner diameter (7) of the pre-geometry (3) is calibrated by shaping, d) removal of the pre-geometry (3) from the outer tool (5) and removal of the inner mandrel from the pre-geometry (3), e) axial movement of the pre-geometry (3) into a drawing tool with a roll-in contour having a pot-like concavity, with simultaneous shaping of the pre-geometry (3) into the tubular product (1) with a rotationally symmetrical outlet opening (8) positioned centrally in the end face, f) removal of the tubular product (1) from the drawing tool.

The invention concerns a method for production of a steel tubular product (1), in particular an airbag tubular product, with the following steps: a) provision of a steel tube (2), b) shaping of the steel tube (2) into a pre-geometry (3), wherein in an end region (4), an outer diameter (5) of the steel tube (2) is reduced by axial movement into an outer tool, c) calibration of an inner diameter (7) of the pre-geometry (3), wherein the pre-geometry (3) is still laid in the outer tool, and an inner mandrel, with an outer diameter corresponding to the inner diameter (7) of the calibrated pre-geometry (3), is introduced into the end region (4) of the pre-geometry (3), and the pre-geometry (3) is pressed against the outer tool such that the inner diameter (7) of the pre-geometry (3) is calibrated by shaping, d) removal of the pre-geometry (3) from the outer tool (5) and removal of the inner mandrel from the pre-geometry (3), e) axial movement of the pre-geometry (3) into a drawing tool with a roll-in contour having a pot-like concavity, with simultaneous shaping of the pre-geometry (3) into the tubular product (1) with a rotationally symmetrical outlet opening (8) positioned centrally in the end face, f) removal of the tubular product (1) from the drawing tool.

A roof airbag for vehicles is proposed. The roof airbag includes: a main chamber configured to be deployed as gas is introduced therein through a diffuser; an overlap chamber into which the gas is introduced and configured to be deployed into a shape that overlaps the main chamber around the diffuser; and a support chamber into which the gas is introduced and configured to be deployed while overlapping a roof frame.

A roof airbag for vehicles is proposed. The roof airbag includes: a main chamber configured to be deployed as gas is introduced therein through a diffuser; an overlap chamber into which the gas is introduced and configured to be deployed into a shape that overlaps the main chamber around the diffuser; and a support chamber into which the gas is introduced and configured to be deployed while overlapping a roof frame.

An apparatus for helping to protect an occupant of a vehicle includes an airbag configured to inflate and deploy away from a vehicle roof toward a vehicle seat. The airbag includes a base portion configured to be connected to the vehicle roof and a cushion portion in fluid communication with the base portion. The cushion portion extends from the base portion toward the vehicle seat to an inflated and deployed condition in which the cushion portion is configured to receive and cushion an occupant seated on the vehicle seat. The apparatus also includes a deployment pocket for initially restricting the deployment of the cushion portion without restricting the base portion.