Arrangement for expanding liquefied gas. The arrangement includes a vaporizing element having a heat exchanger. The heat exchanger has an impermeable enclosure containing a heating fluid and a vaporizing tube made of a heat conducting material through which the liquefied gas passes. The vaporizing tube includes an intake connected to a supply reservoir and an outlet supplying vaporized gas. An element is provided for regulating a flow rate and a pressure of vaporized gas. A tube connects the outlet of the vaporizing tube to the element for regulating a flow rate and a pressure of vaporized gas. The element for regulating a flow rate and a pressure of vaporized gas is connected to an engine. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.