With an excessive impact load generated by a side impact or collision, even in the event that a falling deformation of a pillar connected to a side sill occurs at an initial stage of the side impact, triggering a twisting deformation of the side sill as the side sill is pulled along with the falling deformation of the pillar, the side sill is allowed to maintain a high rigidity against the impact load at a middle stage of the side impact due to a projecting surface of a secondary reinforcement panel being made to be oriented upwards by virtue of the twisting deformation of the side sill.
A deformation element for absorbing lateral impact forces in the lateral region of a motor vehicle has at least two hollow chambers disposed one behind another in the direction of action of the lateral impact forces. An axial extension of which is in each case oriented at right angles to the direction of action of the lateral impact forces. The deformation element has at least one fastening portion for mounting the deformation element on an associated lateral sill portion of the vehicle.
A side wall formed in one piece with an outer shell of a side sill from high-strength sheet steel is described. The side wall merges without gradation into the adjoining side sill in the region of at least one vehicle pillar, so that the sheet steel is subjected to significantly less strain. A side sill of shell construction for a motor vehicle is partially formed by a side wall which may be composed of high-strength sheet steel. The side sill includes, in one case, at least one inner shell and an outer shell which are connected to one another by upper and a lower flanges. The outer shell is formed by the lower section of a side wall to which an outer panel is attached for providing a downward extension, so that the inner shell and the outer panel are connected to one another in the lower flange, and the inner shell and the side wall are connected to one another in the upper flange.
