US Patent 10988178 Vehicle underbody structure

On a side face of a floor tunnel, a side reinforcement is disposed between an upper edge of the side face and a connected region at which a dash cross member is connected to the floor tunnel. An upper reinforcement extends in a longitudinal direction at an upper portion of the floor tunnel. The side reinforcement extends rearward with its rear edge inclining upward. A collision load input from a side member enters the side face of the floor tunnel via the dash cross member. The collision load is, then, transmitted to the upper reinforcement through the floor tunnel along the rear edge of the side reinforcement.