A vehicle underbody structure includes a pair of rockers that are provided on both vehicle width direction sides of a vehicle underbody and extend in a vehicle front-rear direction, a battery that is disposed centrally in a vehicle width direction center between the pair of rockers and is disposed above a vehicle floor and on the lower side of a seat, a fuel tank that is disposed in the vehicle width direction center between the pair of rockers and is disposed under the vehicle floor and further toward a rear side of the vehicle than the battery, and a waste pipe that is coupled to a drive unit provided at a vehicle front side of the battery and extends in the vehicle front-rear direction between the battery and one of the rockers.

A vehicle underbody structure includes a pair of rockers that are provided on both vehicle width direction sides of a vehicle underbody and extend in a vehicle front-rear direction, a battery that is disposed centrally in a vehicle width direction center between the pair of rockers and is disposed above a vehicle floor and on the lower side of a seat, a fuel tank that is disposed in the vehicle width direction center between the pair of rockers and is disposed under the vehicle floor and further toward a rear side of the vehicle than the battery, and a waste pipe that is coupled to a drive unit provided at a vehicle front side of the battery and extends in the vehicle front-rear direction between the battery and one of the rockers.

A wheeled vehicle includes a diffuser affixed directly or indirectly to a frame or formed as part of the frame. The diffuser defines a tunnel-shaped void disposed at a bottom of the vehicle open to the ground surface below. The tunnel starts at a proximal end with a first height and increases to a second height closer to the rear portion. A distal end of the diffuser is open to the rear portion. A thruster is affixed directly or indirectly to the frame, the thruster having an exhaust outlet disposed at, near or within the diffuser aimed at the tunnel-shaped void. The exhaust outlet is disposed a distance away from the distal end of the diffuser, wherein the exhaust outlet is configured to introduce a moving airstream into the diffuser thereby increasing downforce of the wheeled vehicle generated by the diffuser while wheeled vehicle is stationary or moving.

A wheeled vehicle includes a diffuser affixed directly or indirectly to a frame or formed as part of the frame. The diffuser defines a tunnel-shaped void disposed at a bottom of the vehicle open to the ground surface below. The tunnel starts at a proximal end with a first height and increases to a second height closer to the rear portion. A distal end of the diffuser is open to the rear portion. A thruster is affixed directly or indirectly to the frame, the thruster having an exhaust outlet disposed at, near or within the diffuser aimed at the tunnel-shaped void. The exhaust outlet is disposed a distance away from the distal end of the diffuser, wherein the exhaust outlet is configured to introduce a moving airstream into the diffuser thereby increasing downforce of the wheeled vehicle generated by the diffuser while wheeled vehicle is stationary or moving.

An air fairing device is connected below the bottom a frameless trailer to improve aerodynamic efficiency and improve fuel economy. One embodiment of the air fairing device provides an air deflector positioned forward of a trolley which supports the frameless trailer at a rear end. A second embodiment of the air fairing device provides two deflectors mounted below the frameless trailer. The first deflector is attached and extends downward from an articulating arm, said arm connecting the trailer to a semi-tractor or truck. The second deflector connected to below the bottom of the frameless trailer and positioned rear of the first deflector and forward of the trolley. A third embodiment is similar to the second but further includes a third deflector positioned between two axles of the trolley.

An air fairing device is connected below the bottom a frameless trailer to improve aerodynamic efficiency and improve fuel economy. One embodiment of the air fairing device provides an air deflector positioned forward of a trolley which supports the frameless trailer at a rear end. A second embodiment of the air fairing device provides two deflectors mounted below the frameless trailer. The first deflector is attached and extends downward from an articulating arm, said arm connecting the trailer to a semi-tractor or truck. The second deflector connected to below the bottom of the frameless trailer and positioned rear of the first deflector and forward of the trolley. A third embodiment is similar to the second but further includes a third deflector positioned between two axles of the trolley.

A system and method for controlling deployment of a vehicle air dam that include receiving vehicle data associated with a vehicle operating condition. The system and method also include analyzing the vehicle data to determine if an elevated engine load condition is present to implement a normal air dam deployment mode or a prohibitive air dam deployment mode. The system and method further include controlling an actuator associated with the vehicle air dam to deploy or retract the vehicle air dam based on the implementation of the normal air dam deployment mode or the prohibitive air dam deployment mode.

A system and method for controlling deployment of a vehicle air dam that include receiving vehicle data associated with a vehicle operating condition. The system and method also include analyzing the vehicle data to determine if an elevated engine load condition is present to implement a normal air dam deployment mode or a prohibitive air dam deployment mode. The system and method further include controlling an actuator associated with the vehicle air dam to deploy or retract the vehicle air dam based on the implementation of the normal air dam deployment mode or the prohibitive air dam deployment mode.

An adjustment device for controlling the aerodynamic load acting on a motorcar, includes an underbody diffuser.

An adjustment device for controlling the aerodynamic load acting on a motorcar, includes an underbody diffuser.