Control device for internal combustion engine

A control device for an internal combustion engine, the control device comprising an ignition controller that controls energization of an ignition coil that gives electric energy to an ignition plug that discharges in a cylinder of the internal combustion engine to ignite fuel,

• wherein the ignition controller controls energization of the ignition coil so that first electric energy is released from the ignition coil while second electric energy is released as energy superposed on the first electric energy, the second electric energy changing based on a gas state around the ignition plug,
• wherein
• the ignition coil includes:
• a primary main coil and a primary sub-coil that are disposed respectively on a primary side;
• and
• a secondary coil disposed on a secondary side, and
• the ignition controller controls a primary main current flowing through the primary main coil, and controls also a primary sub-current flowing through the primary sub-coil, based on the gas state around the ignition plug, and
• wherein the ignition controller controls the primary main current and the primary sub-current so that even if a gas flow velocity around the ignition plug changes, a sum of a period of the primary main current's flowing through the primary main coil and a period of the primary sub-current's flowing through the primary sub-coil remains constant.