US 11,945,385 B2
Energy absorption device
Martin Gross, Haimhausen (DE); Arne Koehler, Pliening (DE); Tamara Manske, Munich (DE); Christian Muselmann, Munich (DE); Mazdak Novine, Andechs (DE); Tim Rudolph, Munich (DE); and Manuel Schroeder, Oberhaching (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/593,955
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Mar. 2, 2020, PCT No. PCT/EP2020/055450
§ 371(c)(1), (2) Date Sep. 29, 2021,
PCT Pub. No. WO2020/200604, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 10 2019 108 742.2 (DE), filed on Apr. 3, 2019.
Prior Publication US 2022/0161746 A1, May 26, 2022
Int. Cl. B60R 19/18 (2006.01)
CPC B60R 19/18 (2013.01) [B60R 2019/186 (2013.01); B60R 2019/1866 (2013.01); B60R 2019/1873 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An energy absorption device for a bumper of a vehicle, comprising:
a first deformation element, which extends substantially over an entire width of the bumper; and
at least one second deformation element, which is arranged on the first deformation element, in an exterior recess of the first deformation element, wherein
the first and the second deformation element are made of foam material with different densities,
the foam material of the first deformation element has a density which is at least 50 g/l lower than that of the foam material of the second deformation element,
the density of the foam material of the first deformation element is 20 to 50 g/l and the density of the foam material of the second deformation element is 80 to 250 g/l, and
the second deformation element is arranged adjacent to the first deformation element in a longitudinal direction of the vehicle whereby, in an event of a collision, the first deformation element is compressed before the second deformation element is compressed.