Energy absorbing countermeasure
View Patent ↗An energy absorber for a vehicle includes an elongate member having lateral and longitudinal axes. The elongate member may include one or more channels which are oriented to have walls which extend in the general direction of the lateral axis. An upper surface of at least one of the channels may have an engagement feature that may be configured to engage a stationary member of a vehicle when an impact force brings the engagement feature into contact with the stationary member. The channels may be configured to deform and collapse to absorb at least some of the impact force.
1. An energy absorber for a vehicle having a structural member, the energy absorber comprising:
an elongate member configured to operate with an instrument panel, the elongate member having a lateral axis and a longitudinal axis, and including a first channel wherein the first channel comprises a generally planar upper surface and a pair of spaced apart laterally extending walls including an engagement feature disposed along the upper surface, the elongate member further including at least one mounting member configured to facilitate attachment of the first channel to a portion of the vehicle such that the engagement feature is disposed adjacent to the structural member,
the engagement feature having a shape that complements an outer surface of the structural member, such that when an impact force causes contact between the structural member and the engagement feature, the engagement feature will conform to and engage the structural member and the first channel will at least partially deform to absorb at least a portion of the impact force; and
wherein at least one wall of said pair of spaced apart laterally extending walls of said first channel includes at least one opening extending therethrough.
2. The energy absorber of claim 1 , wherein the elongate member further includes an intermediate channel wherein the intermediate channel comprises a generally planar upper surface and a pair of spaced apart laterally extending walls and is disposed adjacent the first channel and connected by a mounting member, the intermediate channel being shorter in height than the first channel and configured without an engagement feature having a shape that complements the outer surface of the structural member.
3. The energy absorber of claim 2 , further comprising a plurality of the first channels disposed in relation to each other such that the intermediate channel is disposed between two of the first channels.
4. The energy absorber of claim 1 , further comprising one or more channels in addition to the first channel to provide a plurality of channels, wherein at least two of the channels are separated by the mounting member.
5. The energy absorber of claim 1 , further comprising a plurality of the mounting members, each of which is attached to a respective one of the laterally extending walls and at least one of which is configured to receive a fastener along an outer edge to secure the respective mounting member to a portion of the vehicle.
6. The energy absorber of claim 1 , wherein the at least one opening is asymmetrical.
7. The energy absorber of claim 1 , wherein a center of at least one of the openings is spaced apart from a center of the respective wall in which the opening is included.
8. The energy absorber of claim 1 , further comprising one or more channels in addition to the first channel to provide a plurality of channels, and at least one of the channels comprises at least one longitudinally oriented wall connecting two laterally extending walls.
9. The energy absorber of claim 8 , wherein the longitudinally oriented wall includes an opening extending therethrough.
10. The energy absorber of claim 8 , wherein the longitudinally oriented wall is located at an end of the two laterally extending walls.
11. The energy absorber of claim 8 , wherein the longitudinally oriented wall is located intermediate between opposing ends of the two laterally extending walls.
12. The energy absorber of claim 8 , wherein a longitudinally oriented flange connects one channel to an adjacent channel of the plurality of channels.
13. The energy absorber of claim 2 , wherein a flange connects the mounting member, the first channel and the intermediate channel.
14. The energy absorber of claim 1 , further comprising one or more channels in addition to the first channel to provide a plurality of channels, and at least one of the channels comprises at least one longitudinally oriented wall connecting two laterally extending walls and at least one of the channels comprises at least one through opening defined by at least one wall thereof.
15. The energy absorber of claim 14 , wherein the laterally extending walls each include respective centers aligned with each other along an axis parallel to the longitudinal axis of the elongate member, and
the through opening defines a respective center aligned along an axis parallel to the longitudinal axis of the elongate member and offset from the axis aligning the centers of the laterally extending walls.
16. The energy absorber of claim 1 , wherein one or more of the spaced apart laterally extending walls of the first channel include a rib extending from one of the spaced apart laterally extending walls in the direction of the other of the spaced apart laterally extending walls.
17. The energy absorber of claim 1 , wherein said attachment of the first channel to a portion of the vehicle comprises one or more of mechanical fastening, welding means or adhesive means.
18. The energy absorber of claim 1 , wherein said spaced apart laterally extending walls form an angle α with a vertical plane V in the range of 0-45 degrees.
19. The energy absorber of claim 1 , wherein said elongate member comprises one or more of plastic and metal.
20. The energy absorber of claim 19 , wherein said elongate member comprises injection molded thermoplastic.
21. The energy absorber of claim 1 , wherein said spaced apart walls of said first channel have a thickness in the range of about 1.5 mm. to about 4 mm.
22. The energy absorber of claim 4 , wherein said plurality of channels are separated by about 50 mm. to about 200 mm.
23. An energy absorber for a vehicle having a structural member, the energy absorber comprising:
a plurality of channels configured to operate with an instrument panel, each of which is defined by a respective upper surface and at least two corresponding lateral walls extending from the respective upper surface and disposed opposite each other, at least one of the channels including an engagement feature disposed along a respective one of the upper surfaces, the engagement feature being geometrically configured to complement a corresponding outer geometry of the structural member such that when an impact force causes contact between the structural member and the engagement feature, the engagement feature will conform to and mate with the structural member and the channels will at least partially deform to absorb at least a portion of the impact force;
at least one mounting member positioned between the plurality of channels and configured to facilitate attachment of the channels to a portion of the vehicle such that the engagement feature is disposed at a distance from the structural member before an impact force causes contact between the structural member and the engagement feature; and
wherein at least one wall of said laterals walls of at least one channel includes at least one opening extending therethrough.
24. The energy absorber of claim 1 , wherein:
the structural member comprises a structural cross member.
25. The energy absorber of claim 24 , wherein:
the structural cross member is positioned forward of an instrument panel when the instrument panel is installed in the vehicle.