Control device for internal combustion engine

A control device for an internal combustion engine, the control device comprising:

• an intake passage injection valve provided in each of cylinders of the internal combustion engine for injecting fuel into an intake passage;
• a cylinder injection valve provided in each of the cylinders for injecting fuel into an inside of the cylinder;
• a fuel supply system configured to pump and pressure-feed fuel to each of the cylinders, and the fuel supply system configured to sequentially inject the fuel into two cylinders during a pressure-feed-interval period, the pressure-feed-interval period being a period from a time one fuel pressure-feed operation is performed to a time a next fuel pressure-feed operation is performed;
• an alcohol concentration detector that detects an alcohol concentration in the fuel;
• a controller configured to execute a first injection control during the pressure-feed-interval period for injecting fuel from only the cylinder injection valve into a first cylinder and a second cylinder, which are two cylinders for which fuel injection is sequentially performed during the pressure-feed-interval period, when the alcohol concentration in the fuel is equal to or lower than a predetermined determination value;
• and
• the controller configured to execute a second injection control during the pressure-feed-interval period for injecting fuel from the cylinder injection valve into the first cylinder and for injecting fuel from both the intake passage injection valve and the cylinder injection valve into the second cylinder when the alcohol concentration in the fuel is higher than the determination value.