Frontal impact e.g. Danner impact, energy absorption device for motor vehicle, has energy absorbing case evacuating material to exterior of case in evacuation direction, when pressure exerted on device by rail and beam exceeds preset value

摘要

#CMT# #/CMT# The device has an energy absorbing case (2) that is filled with an energy absorbing material (2a) e.g. aluminum absorbing foam. The case permits the evacuation of the material to the exterior of the case, in a given evacuation direction, when the pressure exerted on the device by the rail and a bumper beam (1) exceeds a predetermined threshold value. The threshold value corresponds to a bending effort of the rail. A plate (4) of the case permits the material to be evacuated inside the end of the rail. #CMT#USE : #/CMT# Used for a bumper beam that is mounted at the front of a motor vehicle, for absorbing the energy of a frontal or normalized impact e.g. Danner impact, on the vehicle. #CMT#ADVANTAGE : #/CMT# The energy absorbing case permits evacuating the energy absorbing material, thus ensuring a progressive absorption of the impact energy and limiting the residual volume of the material. The evacuation of the material can therefore be performed in a controlled manner and the encumbrance of the device is reduced. The device therefore has a high energy absorption capacity and resists bending efforts generated during the Danner impact in a better manner. The device limits the detachment of the energy absorbing case. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a situation before a frontal impact of an energy absorption case. 1 : Bumper beam 2 : Energy absorbing case 2a : Energy absorbing material 4 : Plate 5 : Rail end 8 : Plate part #CMT#METALLURGY : #/CMT# The energy absorbing material is absorbing aluminum foam.