Abstract: A front structure of a vehicle comprises a pair of side members arranged in a longitudinal direction of the vehicle, a pair of crash boxes arranged at front ends of the side members, and a body back-up structure located at a rear end of the front portion. The front structure is adapted to give an impact response curve with deceleration versus time, when subjected to a full frontal barrier impact at 35 mph according to USNCAP. The impact response curve comprises in sequence: a first phase during which deceleration increases, a second phase forming a first peak level of the deceleration, a third phase during which the deceleration is less than during the second phase, and a fourth phase forming a second peak level of the deceleration, during which fourth phase the deceleration is greater than during the third phase.

Abstract: A front structure of a vehicle comprises a pair of side members arranged in a longitudinal direction of the vehicle, a pair of crash boxes arranged at front ends of the side members, and a body back-up structure located at a rear end of the front portion. The front structure is adapted to give an impact response curve with deceleration versus time, when subjected to a full frontal barrier impact at 35 mph according to USNCAP. The impact response curve comprises in sequence: a first phase during which deceleration increases, a second phase forming a first peak level of the deceleration, a third phase during which the deceleration is less than during the second phase, and a fourth phase forming a second peak level of the deceleration, during which fourth phase the deceleration is greater than during the third phase.

Abstract: An arrangement F(1,1?,1?) for weakening a structure (4,4?,12?), comprises at least one element (8,28) arranged at the structure (4,4?,12?) to affect its strength, a sensor (9) arranged to sense impact acting on the structure (4,4?,12?) and a control unit (10) disposed to, firstly, receive signals when the signal received from the sensor (9) agrees with a set value. The element (8,28) comprises an explosive charge (11), which is disposed to detonate when the control signal is emitted from the control unit (10). The explosive charge (11) is disposed at the element (8,28) in such a manner that the element (8,28) awakens the strength of the structure (4,4?,12?) when the explosive charge (11) detonates.

Abstract: The invention relates to an arrangement F(1, 1′, 1″) for weakening a structure (4, 4′,12″), comprising at least one element (8, 28) arranged at the structure (4, 4′, 12″) to affect its strength, a sensor (9) arranged to sense impact acting on the structure (4, 4′, 12″) and a control unit (10) disposed to, firstly, receive signals from the sensor (9) and, secondly, emit a control signal when the signal received from the sensor (9) agrees with a set value. The element (8, 28) comprises an explosive charge (11), which is disposed to detonate when said control signal is emitted from the control unit (10). The explosive charge (11) is disposed at the element (8, 28) in such a manner that the element (8, 28) ewakens the strength of the structure (4, 4′, 12″) when the explosive charge (11) detonates.