Uniflow-scavenged two-cycle engine

A uniflow-scavenged two-cycle engine comprising:

• a cylinder in which a combustion chamber is formed;
• a piston that slides in the cylinder;
• a scavenging chamber which surrounds one end side of the cylinder in the stroke direction of the piston and to which compressed active gas is guided;
• a plurality of scavenging ports that are provided in a circumferential direction of the cylinder, are provided in a portion of the cylinder which is positioned in the scavenging chamber, and that suction the active gas from the scavenging chamber to the combustion chamber in response to a sliding motion of the piston;
• a fuel injection opening that is provided on an outer side of the cylinder in a radial direction thereof from the scavenging ports and injects fuel gas into the active gas which is suctioned into the scavenging ports;
• and
• a fuel injecting valve that opens and closes a fuel supply path through which a fuel tank, in which the fuel gas is stored, communicates with the fuel injection opening,
• wherein the fuel supply path includes a fuel pipe,
• the fuel pipe extends in a stroke direction of the piston and is located in the scavenging chamber,
• the fuel injection opening is formed in the fuel pipe,
• the fuel injecting valve is disposed in an isolated space isolated from the scavenging chamber, and
• the fuel pipe is disposed on the outer side of an outer surface of the cylinder in the radial direction between the scavenging ports which are adjacent to each other.