An integrated side member having an impact absorbing structure may include a side member upper part connected to a front coupling end portion to be connected to a crash box, the side member upper part being formed in a U shape by connecting its left and right members to each other, side member lower parts fastened to the side member upper part, and a dash cross member coupled to a lower portion of the side member upper part and between both side member lower parts.

A vehicle load-bearing structure includes a cell made of composite materials and composed of a plurality of components joined to each other by at least one joining system to form a single structure; the cell is made up of a number n of components between 3 and 8, that is 3<n<8.

A stiffening element to protect against a side or frontal impact for an electric vehicle includes a first longitudinal support beam and a second longitudinal support beam. A trunk of the electric vehicle is positioned between the first longitudinal support beam and the second longitudinal support beam. The trunk is positioned between a front bumper and a firewall of the electric vehicle. The trunk includes a trunk base forming a floor of the trunk. The trunk base includes one or more stiffening elements positioned across one or both of a width or length of the trunk base.

A reinforcement member disposed at a front portion of a floor panel is disposed angled toward a vehicle width direction inside on progression from a position (input portion) on a vehicle width direction outside and vehicle front-rear direction front side of the floor panel toward the vehicle front-rear direction rear side. An outer end portion of the reinforcement member is joined to a rocker, and an inner end portion of the reinforcement member is joined to a floor tunnel portion. When the vehicle is involved in a frontal collision, collision load is input in an oblique direction to the position on the vehicle width direction outside and the vehicle front-rear direction front side of the floor panel.

A motor vehicle body for an electrically drivable motor vehicle includes: a vehicle floor element, which transitions, at the front end of a passenger compartment, into a firewall; longitudinal members of a front-end structure, the rear ends of the longitudinal members being fastened to the firewall and, at a point of connection, to the vehicle floor element; and a stored energy source, which is located below the vehicle floor element and a front end of which is located below the rear ends of the longitudinal members. In order to provide a motor vehicle body with favorable characteristics in a frontal collision with an obstacle or a vehicle, the vehicle floor element has, behind the points of connection to the rear ends of the longitudinal members, respective embossed portions formed upward in the vehicle vertical direction, and/or the points of connection of the rear ends of the longitudinal members to the vehicle floor element have deliberately weakened portions.

A vehicle floor structure includes a floor tunnel arranged in a center of a vehicle interior in a vehicle width direction from a front end of the vehicle interior to a rear side, the floor tunnel projecting upwardly from a floor surface of the vehicle interior, a tunnel reinforcement that is a reinforcing member covering the floor tunnel, the tunnel reinforcement projecting upwardly from the floor surface of the vehicle interior and extending in a vehicle length direction, and a first floor crossmember extending in the vehicle width direction on the floor surface of the vehicle interior. An opening is formed in each of a pair of side walls of the tunnel reinforcement, the side walls facing each other in the vehicle width direction and the first floor crossmember is arranged so as to go across an inside of the tunnel reinforcement through the openings.

A vehicle body structure includes: a pair of front side frames disposed on a front side of a vehicle to be in parallel with each other along a vehicle front-rear direction; lower members and gussets (load receiving portions) disposed at front ends in the vehicle front-rear direction of the front side frames so as to extend outward in a vehicle width direction; front wheels disposed outward in the vehicle width direction of the front side frames; and right and left side sills extending in the vehicle front-rear direction. Vehicle-width-direction outer end portions of the load receiving portions are positioned outward in the vehicle width direction of vehicle-width-direction inner end portions of the front wheels, and vehicle-width-direction outer end portions of the front wheels are positioned outward in the vehicle width direction of vehicle-width-direction inner end portions of front ends in the vehicle front-rear direction of the side sills.

A lower vehicle body structure is provided, which includes a vehicle body floor having a bottom surface part, a floor tunnel bulging upwardly from the bottom surface part of the vehicle body floor and extending in vehicle front-and-rear directions, a power transmission mechanism disposed inside the floor tunnel, a mount member supporting the power transmission mechanism from below, and seat rails disposed on the vehicle body floor and slidably supporting seats from below. The mount member and the seat rails are jointly fastened to the vehicle body floor.

A lower vehicle body structure includes a vehicle body floor having a bottom surface part, a floor tunnel bulging upwardly from the bottom surface part and extending in vehicle front-and-rear directions, side sills extending in the front-and-rear directions, hinge pillars extending upwardly from the side sills, first frames, lowered parts and second frames. Each first frame extends in the front-and-rear directions between the floor tunnel and a side sill. Each lowered part is provided to the bottom surface part between a first frame and a side sill so as to be lowered below a part where the floor and the side sills are joined. Each second frame extends to a first frame, obliquely rearwardly and inwardly from a side sill along an upper surface of the bottom surface part, and forms in a part including a lowered part a closed cross-section between the bottom surface part and a second frame.

A dash panel supporting structure includes a center member rested on a tunnel portion of a vehicle, a bridge member connected to an upper portion of the center member, and a pair of side members configured to support both ends of the bridge member and both ends of the center member on inner portions of side pillars of the vehicle. Therefore, the tunnel portion, a cowl panel and A-pillars of the vehicle are supported by each other through the dash panel supporting structure, so that the torsional rigidity of the vehicle is improved.