A restraint system for helping to protect an occupant of a vehicle having a roof and a cabin with a seat for the occupant includes an airbag having a stored condition within a base of the vehicle seat and being inflatable to deploy upwards in the cabin and between legs of the occupant to a deployed condition in front of the occupant. The airbag including a lower end having a pair of projections spaced apart in a forward-rearward direction of the vehicle. The airbag being configured to utilize the vehicle seat as a reaction surface for restraining the movement of the airbag in response to occupant penetration into the airbag.

An air bag mounting interior trim that efficiently pressurizes and welds ribs of a retainer and an instrument panel includes: a retainer having a first wall portion disposed at a deployment side of the air bag; and a panel having a second wall portion opposed to the first wall portion, at the deployment side of the first wall portion. The first and second wall portions each have an inclined face inclined in a pressurizing direction at assembly of the retainer and the panel. The retainer has a first rib protruding along the pressurizing direction from the inclined face of the first wall portion toward the panel side. The panel has a second rib protruding along the pressurizing direction from the inclined face of the second wall portion toward the retainer side. The first and second ribs have weld end faces that face each other in parallel, and that are aligned with the pressurizing direction.

A knee-airbag-device attachment structure comprises knee-airbag devices and vehicle-body side brackets which connect the knee-airbag devices and hinge pillars of a vehicle body, respectively. This knee-airbag-device attachment structure further comprises an instrument-panel-member supporting-post side bracket which connects the knee-airbag device to an instrument-panel-member supporting post which is provided to extend between an instrument panel member and a tunnel portion of a floor panel.

One general aspect includes a system to establish a deployment force for an airbag of a vehicle, the system includes: a memory configured to include one or more executable instructions and a processor configured to execute the executable instructions, where the executable instructions enable the processor to carry out the following steps: monitoring a head position of a vehicle occupant; based on the monitored head position, calculating a distance of a body part of a vehicle operator relative to a portion of an interior cabin of the vehicle; and based on the distance of the body part, establishing the deployment force for the airbag.

A knee airbag apparatus for an autonomous vehicle, wherein a first cushion and a second cushion are deployed toward the knees of a passenger and a third cushion is deployed toward the feet and shins of the passenger according to a collision mode (head-on collision, offset collision or oblique collision) and a position (normal position or relaxation position) of a seat.

Airbag cushions and related assemblies configured to protect the lower extremities of a driver by deploying about the contours of a steering column shroud. In some embodiments, the assembly may comprise an inflatable cushion configured to be deployed adjacent to a vehicle steering column to provide protection to a driver's lower extremities during an impact event. The cushion may comprise a primary inflation chamber, a first supplemental inflation chamber fluidly coupled with the primary inflation chamber and configured to deploy on a left side of the vehicle steering column adjacent to the driver's left lower extremity, and a second supplemental inflation chamber fluidly coupled with the primary inflation chamber and configured to deploy on a right side of the vehicle steering column adjacent to the driver's right lower extremity.

An airbag (10) comprises a plurality of interconnected adjacent inflatable cells, wherein a cell is attached to an adjacent cell by at least two seam lines (31, 32), said lines being spaced from each other to define a cell area, which is comprising a gas passage portion (1c, 2c, 3c, 4c) between said adjacent cells.

A knee airbag arrangement for a vehicle. The knee airbag arrangement includes an inflatable airbag and an external tether. The airbag is adapted to be inflated to a position between an instrument panel of the vehicle and a knee/shin region of a vehicle occupant. The knee airbag is adapted to form a first deployment mode or a second deployment mode when in a deployed state. The external tether controls deployment of the airbag to the second deployment mode. The depth (D.sub.2) of the airbag in the second deployment mode is greater than a depth (D.sub.1) of the knee airbag in the first deployment mode. A depth of the airbag in a deployed state is a greatest extent of the airbag perpendicular to the instrument panel in the knee/shin region.

A method for folding a knee airbag may include: folding both sides of an airbag cushion a plurality of times, and fixing the folded portion of the airbag cushion; forming a roll folding part by rolling one side of the airbag cushion of which both sides are folded a plurality of times; and folding the other side of the airbag cushion toward the roll folding part, with the roll folding part formed at the one side of the airbag cushion, and fixing the other side of the airbag cushion.

A knee bolster system for absorbing an impact energy of an occupant's knee is provided with a multi-level force load limiter. The multi-level force load limiter includes three force load limiters. A first force load limiter includes a contact plate for receiving an impact force by the occupant's knee during a vehicle collision. A second force load limiter includes a torsional deflection rod for deforming torsionally by allowing relative rotation, and a third force load limiter includes a locking gear and a female locking base for locking further rotation of a rotational arm after rotation of the torsional deflection rod in the second force load limiter by a predetermined angle based on rotation of the rotational arm. Accordingly, the multi-level force load limiter can create a higher torsion force on the rotational arm of the knee bolster system.