A vehicle occupant protection expandable bladder may comprise an initial expandable chamber, an occupant restraining expandable chamber and a releasable connection that is configured to connect the occupant restraining expandable chamber to the initial expandable chamber or to a vehicle. The vehicle occupant protection expandable bladder may be configured to be expanded from a stowed state to a deployed state in a vehicle. The deployed state may comprise a first phase in which gas flow from the initial expandable chamber to the occupant restraining expandable chamber is at least substantially restricted and a second phase in which gas flow from the initial expandable chamber to the occupant restraining chamber is unrestricted. The releasable connection may be configured to release the connection in the deployed state.

Far-side inflatable airbag assemblies are disclosed to be installed to deploy adjacent an occupant during a far-side collision event or a far-side oblique collision event, and may retain the occupant at the occupant's vehicle occupant position to protect the occupant from collision with structures within the vehicle, as well as from collisions with other occupants of the vehicle. The far-side inflatable airbag assemblies of the present disclosure may be particularly beneficial when installed between vehicle occupant positions of the vehicle.

An assembly includes a seat. The assembly includes a first airbag and a second airbag each supported by the seat and inflatable to an inflated position. The assembly includes a zipper connecting the first airbag to the second airbag in the inflated position. The assembly includes a non-inflatable panel connected to the first airbag and the second airbag. The non-inflatable panel has a releasable fastener releasably connected to one of the first airbag or the second airbag.

An assembly includes a seat. The assembly includes a first airbag and a second airbag each supported by the seat and inflatable to an inflated position. The assembly includes a zipper connecting the first airbag to the second airbag in the inflated position. The assembly includes a non-inflatable panel connected to the first airbag and the second airbag. The non-inflatable panel has a releasable fastener releasably connected to one of the first airbag or the second airbag.

Seat centric airbag restraint systems having pelvis restraint features, along with related methods. In some implementations, a first seat-mounted airbag cushion may be deployed along a first side of a vehicle occupant and a second seat-mounted airbag cushion may be deployed along a second side of the vehicle occupant. A first pelvis restraint chamber may be deployed below the first seat-mounted airbag cushion at an angle relative to the first seat-mounted airbag cushion and towards a first upper thigh of the vehicle occupant. The first pelvis restraint chamber may inhibit forward translation of the vehicle occupant within a vehicle seat by tensioning the pelvis region of the occupant.

Seat centric airbag restraint systems having pelvis restraint features, along with related methods. In some implementations, a first seat-mounted airbag cushion may be deployed along a first side of a vehicle occupant and a second seat-mounted airbag cushion may be deployed along a second side of the vehicle occupant. A first pelvis restraint chamber may be deployed below the first seat-mounted airbag cushion at an angle relative to the first seat-mounted airbag cushion and towards a first upper thigh of the vehicle occupant. The first pelvis restraint chamber may inhibit forward translation of the vehicle occupant within a vehicle seat by tensioning the pelvis region of the occupant.

An airbag equipped with a sub-chamber may include a main chamber expanding by being injected with gas in a collision, and a sub-chamber formed by folding a panel-shaped chamber to be combined with the main chamber and have self-supporting force, the sub-chamber assisting supporting force of the main chamber by expanding with the main chamber.

An airbag equipped with a sub-chamber may include a main chamber expanding by being injected with gas in a collision, and a sub-chamber formed by folding a panel-shaped chamber to be combined with the main chamber and have self-supporting force, the sub-chamber assisting supporting force of the main chamber by expanding with the main chamber.

A roof airbag for a vehicle longitudinally extends along a length between first and second longitudinal ends and laterally extends along a width between first and second lateral sides. An inlet for receiving inflation gases is provided at the first longitudinal end. A plenum is in fluid communication with the inlet for receiving the inflation gases from the inlet. The roof airbag includes a plurality of primary inflatable chambers, each primary inflatable chamber in fluid communication with the plenum to receive inflation gases from the plenum. A plurality of secondary inflatable chambers is in indirect fluid communication with the plenum to receive inflation gases indirectly from the plenum through the plurality of primary inflatable chambers. The primary inflatable chambers of the plurality of primary inflatable chambers are arranged to first drive deployment of the airbag and subsequently inflate the second inflatable chambers of the plurality of second inflatable chambers to tension the airbag in the lateral direction. The primary and secondary inflatable chambers cooperate to provide a barrier between occupants of the vehicle and the roof frame.

A roof airbag for a vehicle longitudinally extends along a length between first and second longitudinal ends and laterally extends along a width between first and second lateral sides. An inlet for receiving inflation gases is provided at the first longitudinal end. A plenum is in fluid communication with the inlet for receiving the inflation gases from the inlet. The roof airbag includes a plurality of primary inflatable chambers, each primary inflatable chamber in fluid communication with the plenum to receive inflation gases from the plenum. A plurality of secondary inflatable chambers is in indirect fluid communication with the plenum to receive inflation gases indirectly from the plenum through the plurality of primary inflatable chambers. The primary inflatable chambers of the plurality of primary inflatable chambers are arranged to first drive deployment of the airbag and subsequently inflate the second inflatable chambers of the plurality of second inflatable chambers to tension the airbag in the lateral direction. The primary and secondary inflatable chambers cooperate to provide a barrier between occupants of the vehicle and the roof frame.