Internal combustion engine

An internal combustion engine comprising:

• a first injection valve configured to inject a fuel into an intake port of the internal combustion engine;
• a second injection valve configured to inject a fuel into a cylinder of the internal combustion engine;
• and
• a controller configured to control an in-cylinder injection ratio that is a ratio of an in-cylinder injection amount to a total amount of a port injection amount and the in-cylinder injection amount, the port injection amount being a fuel injection amount of the first injection valve, the in-cylinder injection amount being a fuel injection amount of the second injection valve, wherein:
• the controller is configured to execute
• detecting accumulation of a deposit in the intake port;
• and
• setting the in-cylinder injection ratio in an operation region that is predetermined to 100% in accordance with the detection of the accumulation of the deposit in the intake port.