A beam provided with at least one first part that has a main body with an overall U-shaped straight cross-section provided with lateral flanges protruding outwards from the sides of the U, the main body further comprising a bottom part as well as two wings forming the sides of the U. The central portion of the main body defines cells working under tension and under compression, respectively, on either side of a neutral main bending axis formed by two transition zones, which are each located between the U-shaped element and a lateral flange. The bottom part of the main body comprises at least one transition formed by a curvature discontinuity. And at least one wing comprises at least one transition formed by a curvature discontinuity.

In a vehicle-body front structure, a left upper member extends from a left front pillar to the vehicle front side. The left upper member extends substantially horizontally from the left front pillar to a left damper housing, and extends in an inclined manner from the left damper housing to the lower portion. Also, a front member extending in an inclined manner of the left upper member is formed in a substantially M shape in side view such that the front member includes three curve portions of a front curve portion, a center curve portion, and a rear curve portion formed sequentially toward the vehicle rear side.

An outrigger is connected to a front end part of an apron upper member, and further, is extended from its connected part up to that area of a front side member which is on its front end side and on its outer side in a vehicle width direction so as to be connected to the front side member. One end part of a connecting support member is connected to a connecting portion between the outrigger and the apron upper member. The connecting support member extends inward in the vehicle width direction in a plan view of a vehicle from its connected part, so as to be connected to the front side member.

A grille shutter device includes: a first bumper reinforcement extending in a vehicle width direction; and a shutter mechanism that is provided with a plurality of support members extending from the first bumper reinforcement in a direction intersecting with the vehicle width direction, is supported by the plurality of support members, and regulates a flow rate of air which flows into an engine room from a grille.

A bumper beam is roll formed so that it gets a closed cross section with, along the length, constant cross section having at least two closed chambers (15, 16) separated by an essentially horizontal partition wall (14). Each chamber has a side (19), which is turned away from the vehicle, with at least one longitudinal concave portion (20, 21; 22, 23) extending along the entire length and one side (24), which is facing the vehicle, with at least one longitudinal convex portion (25, 26; 27, 28) extending along the entire length. After the roll forming, some portions (32) of the cross section are pressed together vertically or horizontally in order to adapt the deformation properties.

A vehicle front structure includes a first bending portion, a second bending portion, and a third bending portion in a left front side frame. An outer panel of the first bending portion includes a first concave portion. An inner panel of the second bending portion includes a second concave portion. The third bending portion is formed to be concave toward an interior. An inner central wall of the inner panel extends flat to the rear side of the vehicle body toward the second bending portion. A left branch gusset extends to tilt from the inner central wall, and the outer panel is joined to a rear surface of the left branch gusset.

Embodiments include a bumper reinforcement having a length including a first section and a second section. The reinforcement includes a reinforcement body made of a steel sheet and having a cross section that is open on one side and uniform along the length of the bumper reinforcement, the cross section of the body in at least the first section of the reinforcement including a high-strength portion and a low-strength portion, the high-strength portion having a first tensile strength, and the low-strength portion having a second tensile strength that is less than the first tensile strength. In an embodiment, the reinforcement further includes a closure closing the open side of the body within the first section of the reinforcement and joined to the body at the low-strength portion in the first section.

The present invention provides a vehicle frame structure including: a pair of right and left side rails; a cross member that bridges the side rails in the vehicle width direction; a bumper reinforcement that is placed on the front side of the side rails; load bearing portions that are disposed at vehicle width direction outer side surfaces of the side rails; curved portions that are disposed in the bumper reinforcement, curve toward the vehicle rear side heading outward in the vehicle width direction in sections of the bumper reinforcement at the vehicle width direction outer sides of the side rails; and projecting portions that are secured to rear surfaces of the curved portions of the bumper reinforcement, that project toward the vehicle rear side, that are placed with gaps between them and the load bearing portions.

A sensor bracket assembly is configured to extend between a sensor beam and a bumper beam of a vehicle. The sensor bracket assembly can include a bracket first section that is configured to be directly or indirectly connected to the bumper beam. The sensor bracket assembly can also include a bracket second section that is configured to be directly or indirectly connected to the sensor beam. The sensor bracket assembly can further include a spacer section that projects from the bracket first section and is configured to extend towards but be spaced from one of the bracket second section and the bumper beam.

The bumper reinforcement has a front surface flange, an upper surface web, a lower surface web, an upper lip, and a lower lip. An end of the upper surface web on the upper lip side is thicker than a center. When a collision load is applied to the front surface flange, the upper surface web extending in a direction orthogonal to the front surface flange from vicinity of an upper end of the front surface flange is deformed in an outward opened direction, and the upper lip extending downward from an extension end of the upper surface web is deformed in an inward closed direction.