Frontal airbag systems for oblique crash protection

An inflatable airbag system that is configured to be mounted to a steering wheel of a vehicle, the inflatable airbag system comprising:

• a base cushion that defines an inflatable base cushion chamber configured to receive inflation gas from an inflator to expand the base cushion from a compact state to a deployed state, the base cushion including at least one cushion vent aperture disposed in an occupant-facing panel of the base cushion;
• a first cushion portion coupled to the occupant-facing panel of the base cushion, the first cushion portion defining a first inflatable chamber in fluid communication with and configured to receive inflation gas from the base cushion through the at least one cushion vent aperture of the base cushion to expand the first cushion portion from a compact state outward toward a seating position of the vehicle to a deployed state;
• and
• a second cushion portion coupled to the occupant-facing panel of the base cushion, the second cushion portion arranged concentric with the first cushion portion and defining a second inflatable chamber that is configured to receive inflation gas from at least one cushion vent aperture of the first cushion portion to expand the second set of cushion portions from a compact state outward toward the seating position to a deployed state,
• wherein the second cushion portion comprises a single toroidal cushion portion that is toroidal in shape, and wherein the first cushion portion is arranged more centrally than the toroidal cushion portion such that the first cushion portion is disposed within a center area of the toroidal cushion portion.

An inflatable airbag system that is configured to be mounted to a steering wheel of a vehicle, the inflatable airbag system comprising:

• a base cushion that defines an inflatable base cushion chamber configured to receive inflation gas from an inflator to expand the base cushion from a compact state to an expanded state, the base cushion including a plurality of cushion vent apertures disposed in an occupant-facing panel of the base cushion;
• a first set of cushion portions coupled to the occupant-facing panel of the base cushion, the first set of cushion portions arranged concentric with a center of the occupant-facing panel of the base cushion, the first set of cushion portions defining a first set of inflatable chambers each configured to receive inflation gas from a cushion vent aperture of the plurality of cushion vent apertures of the base cushion to expand the first set of cushion portions from a compact state outward toward a seating position of the vehicle to an expanded state;
• and
• a second set of cushion portions coupled to the occupant-facing panel of the base cushion, the second set of cushion portions arranged concentric with the center of the occupant-facing panel of the base cushion and the first set of cushion portions, the second set of cushion portions defining a second set of inflatable chambers each configured to receive inflation gas from at least one of a cushion vent aperture of the plurality of cushion vent apertures of the base cushion and a cushion vent aperture of an adjacent cushion portion of the first set of cushion portions to expand from a compact state outward toward the seating position to an expanded state,
• wherein the first set of cushion portions is disposed more centrally relative to the second set of cushion portions.