The Hy-wire (Hydrogen drive-by-wire) is a concept car from General Motors originally introduced in January 2002.
[1] Due to hydrogen fuel cell drive system used by the Hy-wire, the conventional car layout has been revamped.
This serves to lower the car's center of gravity, but more importantly to standardize vehicle drive train systems.
Because all propulsion and energy storage systems are housed in the skateboard, designers are free to arrange the passenger compartment however they see fit.
This allows for highly flexible modular vehicle configurations such as a 4-door sedan, mini van, or even a small bus to be placed on the same drive system, with the only difference being the shape of the car's upper body and the location of seats.