A kart includes a chassis having a pair of substantially parallel tubular rails extending longitudinally and connected to one another at each end by at least one transverse tubular element. The kart chassis includes, in the front portion thereof, at least two substantially flared-U-shaped tubes positioned facing one another and assembled in the middle portion such as to form an X-shaped structure between the tubular rails, and at least two substantially rectilinear tubes disposed on each side of the X-shaped structure and each having a first end solidly connected to one of the tubular rails and another end solidly connected to a central portion of the X-shaped structure.

A webbing device for a vehicle underbody can comprise a plurality of rows of ribs and members that extend between the ribs to provide rigidity and force load distribution. The webbing device can comprise channels to receive a variety of structural components of the underbody and can accommodate underbodies of various sizes without altering its rigidity and force load distribution.

Described herein is utilization of nontransparent Shock-Absorbing Energy Dissipation Padding (SAEDP) in an autonomous on-road vehicle. In one embodiment, the vehicle includes a side window located at eye level of an occupant who sits in the vehicle. The side window enables the occupant to see the outside environment. A motor is configured to move the SAEDP over a sliding mechanism between first and second states. A processor is configured to command the motor to move the SAEDP from the first state to the second state responsive to an indication that a probability of an imminent collision reaches a threshold. In the first state, the SAEDP does not block the occupant's eye level view to the outside environment, and in the second state, the SAEDP blocks the occupant's eye level view to the outside environment in order to protect the occupant's head against hitting the side window during collision.

Described herein is utilization of nontransparent Shock-Absorbing Energy Dissipation Padding (SAEDP) in an autonomous on-road vehicle. In one embodiment, the vehicle includes a side window located at eye level of an occupant who sits in the vehicle. The side window enables the occupant to see the outside environment. A motor is configured to move the SAEDP over a sliding mechanism between first and second states. A processor is configured to command the motor to move the SAEDP from the first state to the second state responsive to an indication that a probability of an imminent collision reaches a threshold. In the first state, the SAEDP does not block the occupant's eye level view to the outside environment, and in the second state, the SAEDP blocks the occupant's eye level view to the outside environment in order to protect the occupant's head against hitting the side window during collision.

A tunnel side frame includes a U-shaped portion having a U-shaped cross section opening upward, the U-shaped portion comprising a bottom face portion, an outer face portion, and an inner face portion. A front tunnel member comprises a first face portion which faces to the bottom face portion of the tunnel side frame, a second face portion which faces to the inner face portion of the tunnel side frame, and a third face portion which extends inward from an upper end of the second face portion. The front tunnel member is attached to a vehicle body by attaching the first face portion to the bottom face portion of the U-shaped portion and attaching the third face portion to a floor tunnel.

A tunnel side frame includes a U-shaped portion having a U-shaped cross section opening upward, the U-shaped portion comprising a bottom face portion, an outer face portion, and an inner face portion. A front tunnel member comprises a first face portion which faces to the bottom face portion of the tunnel side frame, a second face portion which faces to the inner face portion of the tunnel side frame, and a third face portion which extends inward from an upper end of the second face portion. The front tunnel member is attached to a vehicle body by attaching the first face portion to the bottom face portion of the U-shaped portion and attaching the third face portion to a floor tunnel.

A vehicle lower portion structure has: a tunnel portion disposed at a vehicle transverse direction central portion of a floor portion; a front side member whose rear portion is disposed at a vehicle lower side of the floor portion and a vehicle transverse direction outer side of the tunnel portion; a first member including a first horizontal wall that extends from the rear portion toward a vehicle transverse direction inner side, and a first vertical wall bent toward a vehicle upper side from the first horizontal wall; and a second member spanning an opening portion of the tunnel portion. The second member includes a second horizontal wall, and a second vertical wall that is bent toward the vehicle upper side from the second horizontal wall, is disposed parallel to the first vertical wall, and is joined to the first vertical wall.

A vehicle lower portion structure has: a tunnel portion disposed at a vehicle transverse direction central portion of a floor portion; a front side member whose rear portion is disposed at a vehicle lower side of the floor portion and a vehicle transverse direction outer side of the tunnel portion; a first member including a first horizontal wall that extends from the rear portion toward a vehicle transverse direction inner side, and a first vertical wall bent toward a vehicle upper side from the first horizontal wall; and a second member spanning an opening portion of the tunnel portion. The second member includes a second horizontal wall, and a second vertical wall that is bent toward the vehicle upper side from the second horizontal wall, is disposed parallel to the first vertical wall, and is joined to the first vertical wall.

Vehicle frames for battery powered electric vehicles are disclosed. An example apparatus disclosed herein includes a vehicle subframe including a first rail and a first rocker on a first side of the vehicle subframe, and a second rail and a second rocker on a second side of the vehicle subframe, the first side opposite the second side, a first diagonal member coupled between the first rail and the second side of the vehicle subframe, the first diagonal member to transfer a first longitudinal load from the first rail to the second side, and a second diagonal member coupled between the second rail and the first side of the vehicle subframe, the second diagonal member to transfer a second longitudinal load from the second rail to the first side.

Vehicle frames for battery powered electric vehicles are disclosed. An example apparatus disclosed herein includes a vehicle subframe including a first rail and a first rocker on a first side of the vehicle subframe, and a second rail and a second rocker on a second side of the vehicle subframe, the first side opposite the second side, a first diagonal member coupled between the first rail and the second side of the vehicle subframe, the first diagonal member to transfer a first longitudinal load from the first rail to the second side, and a second diagonal member coupled between the second rail and the first side of the vehicle subframe, the second diagonal member to transfer a second longitudinal load from the second rail to the first side.