Two-cycle gas engine

A two-cycle gas engine comprising:

• a cylinder;
• a cylinder head;
• a piston housed in the cylinder and configured to define a combustion chamber with a surrounding wall of the cylinder and the cylinder head;
• a fuel gas injector disposed on the cylinder head and configured to inject a fuel gas into the combustion chamber;
• a fuel oil injection unit disposed on the cylinder head and configured to ignite the fuel gas in the combustion chamber by injecting a fuel oil into the combustion chamber to cause self-ignition of the fuel oil;
• a scavenging port opened on the surrounding wall of the cylinder and configured to supply air into the combustion chamber upon the piston being positioned in vicinity of a bottom dead center;
• and
• a control unit configured to control the fuel gas injector and the ignition unit,
• wherein the control unit is configured to:
• cause the fuel gas injector to inject the fuel gas upon the piston being positioned before vicinity of a top dead center in an ascending stroke;
• cause the fuel gas injector to inject the fuel gas upon the piston being positioned in the vicinity of the top dead center;
• and
• ignite the fuel gas inside the combustion chamber by the ignition unit upon the piston being positioned in the vicinity of the top dead center,
• wherein the fuel gas injector includes:
• a first fuel gas injector configured to inject the fuel gas into the combustion chamber upon the piston being positioned in the vicinity of the top dead center;
• and
• a second fuel gas injector configured to inject the fuel gas into the combustion chamber upon the piston being positioned before the vicinity of top dead center.