Methods for modifying a crash deceleration pulse
A volume-filling mechanical structure for modifying a crash comprising a honeycomb celled material expandable from a dormant state to a deployed state; a support surface cooperatively positioned with the honeycomb celled material to cover a surface of the honeycomb celled material in the deployed and dormant states; and a means for deploying said volume-filling mechanical structure from said dormant state to said deployed state.
1 . A method for modifying a crash deceleration pulse in a vehicle comprising:
disposing an energy management device in operative communication with a vehicular surface in a load path, wherein the energy management device comprises an open celled material expandable from a non-expanded state to an expanded state, and an activation mechanism regulating expansion of the open celled material from the non-expanded state to the expanded state;
activating the energy management device in response to an impact event;
expanding the open celled material from the non-expanded state to the expanded state; and
impacting the expanded state of the open celled material and modifying a crash pulse associated with the impact event relative to a baseline in which the energy management device is not present.
2 . The method of claim 1 , further comprising reversing the expansion of the open celled material from the expanded state to the non-expanded state.
3 . The method of claim 1 , wherein impacting the expanded state of the open celled material increases an effective deceleration level of the crash pulse.
4 . The method of claim 1 , wherein the effective deceleration level is less than 20 Gs.
5 . The method of claim 1 , wherein modifying the crash pulse comprises dissipating crash energy, creating a load path, modifying a vehicle deceleration pulse, local stiffening a vehicle structure, stiffening closed section members, modifying occupant protection, modifying pedestrian protection, modifying vehicle compatibility, protecting vulnerable components, and combinations comprising more than one of the foregoing.
6 . The method of claim 5 , wherein protecting vulnerable components comprises positioning the device about a fuel tank when the energy management device is in the expanded state.
7 . The method of claim 5 , wherein dissipating crash energy comprises positioning the energy management device internally to rails of the vehicle, and/or in empty spaces of an engine compartment.
8 . The method of claim 5 , wherein creating the load path comprises positioning the energy management device internally to rails of the vehicle, and/or in a front portion of the rails, and/or in an s-bend region of the rails, and/or at rail kink and buckling points of the rail, and/or in empty spaces within an engine compartment, and/or between a tire and a rocker region, and/or within a wheel well and internal the central tunnel portion, and/or internal to a central armrest when the armrest is in the up position.
9 . The method of claim 5 , wherein modifying the vehicle deceleration pulse comprises positioning the energy management device within empty spaces within an engine compartment, and/or internally to rails of the vehicle at locations responsive to frontal impact events, and/or behind or within a bumper of the vehicle.
10 . The method of claim 5 , wherein local stiffening a vehicle structure comprises positioning the energy management device internal to rails of the vehicle, and/or at internal to a rocker section, and/or internal to a B pillar.
11 . The method of claim 5 , wherein stiffening closed section members subjected to lateral loading, comprises positioning the energy management device internal to a rocker, and/or internal to a B pillar, an/or internal to a central tunnel, and/or internal to a central armrest when the armrest is in the up position.
12 . The method of claim 5 , wherein modifying pedestrian impact protection comprises positioning the energy management device within a bumper, and/or within a hood.
13 . The method of claim 5 , wherein modifying occupant impact protection comprises positioning the energy management device underneath a floor of the vehicle, and/or within a trim panel, and/or within deployable pusher blocks and/or within deployable head restraints.
14 . The method of claim 5 , wherein modifying vehicle compatibility comprises positioning the energy management device internal to a rocker sections, and/or internal to a B-pillar, and/or internal to rails of the vehicle, and/or within a bumper.
15 . The method of claim 1 , wherein the expanded state of the open celled material comprises a transverse plane substantially perpendicular to an anticipated crash axis, wherein the anticipated crash axis is substantially parallel to a cellular axis of cells of the open celled material.
16 . The method of claim 1 , wherein the open celled material comprises plurality of cells having a honeycomb shape.