Internal combustion engine control device and internal combustion engine control method

An internal combustion engine control device configured to control an internal combustion engine mounted on a vehicle that includes a motor and a battery, the internal combustion engine control device comprising:

• a temperature acquisition unit configured to acquire a temperature of the internal combustion engine at a time when it is requested to start the internal combustion engine;
• a motoring execution unit configured to execute motoring of the internal combustion engine using the motor when it is requested to start the internal combustion engine;
• a state of charge (SOC) calculation unit configured to calculate an SOC of the battery;
• and
• an in-cylinder pressure control unit configured to;
• control an in-cylinder pressure of the internal combustion engine during the motoring based on the temperature of the internal combustion engine,
• execute in-cylinder pressure increase control, in which the in-cylinder pressure is increased when the temperature of the internal combustion engine is equal to or less than a threshold temperature compared to when the temperature of the internal combustion engine is higher than the threshold temperature, since the motoring is started, and
• increase the in-cylinder pressure in the in-cylinder pressure increase control to a greater degree as the SOC is lower when the temperature of the internal combustion engine is equal to or less than the threshold temperature.