Expandable vehicle systems

Abstract

An expandable vehicle system includes a base unit having a frame, a first wheel rotatably mounted with respect to the frame, and a battery-electric propulsion system mounted with respect to the frame. The expandable vehicle system also includes a first extension module having a first vehicle body portion and an auxiliary power unit mounted with respect to the first vehicle body portion. The base unit has a first attachment interface mounted with respect to the frame and the first extension module has a second attachment interface mounted with respect to the first vehicle body portion. The first and second attachment interfaces are configured to selectively and releasably engage one another such that the first extension module and the base unit form a single drivable unit when the first and second attachment interfaces are engaged with one another.

Dependencies are inferred from the claim text.