LPG FUEL HEATING DEVICE AND PRESSURE REDUCING VALVE FOR LPG FUEL

An LPG fuel heating device configured in such a manner that the heat source for heating LPG fuel which flows through a gas path is provided to a path-forming body at a position outside the gas path. A longitudinal protrusion wall (125) of the gas path, the longitudinal protrusion wall (125) extending in the reference flow direction in the gas path (93), and widthwise protrusion walls (126) of the gas path, the widthwise protrusion walls (126) extending in the widthwise direction of the gas path (93) so as to intersect the reference flow direction (124), are provided to the path-forming body so as to protrude into the gas path (93). Path chambers (127) and communication paths (128, 129) which connect mutually adjacent path chambers (127) so as to allow the LPG fuel to sequentially flow through the path chambers (127) are formed within the gas path (93) by cooperation among the path-forming body, the longitudinal protrusion wall (125) of the gas path, and the widthwise protrusion walls (126) of the gas path. By this, the communication paths (128, 129) are disposed so as to cause the LPG fuel to sequentially flow in a zigzag course through the path chambers (127). The configuration increases the heat transfer efficiency from the heat source to the LPG fuel and increases the vaporization performance for the liquid component of the LPG fuel.