Control device for internal combustion engine, control method for internal combustion engine, and storage medium

A control device for an internal combustion engine, comprising one or more processors that execute computer-executable instructions stored in a memory, wherein the one or more processors execute the computer-executable instructions to cause the control device for the internal combustion engine to:

• acquire from an air flow meter a flow rate signal that changes in accordance with an air flow rate inside an intake pipe of the internal combustion engine;
• acquire from a pressure sensor a pressure signal that changes in accordance with a pressure inside the intake pipe;
• based on the flow rate signal or the pressure signal, calculate an intake air amount, which is an amount of air taken in by the internal combustion engine;
• acquire an exhaust temperature of the internal combustion engine;
• by adjusting a throttle valve degree of opening, carry out a catalyst protection control to limit the intake air amount in order to protect a catalyst;
• in a case that the intake air amount is calculated based on the flow rate signal, carry out the catalyst protection control based on the acquired exhaust temperature and a first predetermined temperature;
• and
• in a case that the intake air amount is calculated based on the pressure signal, carry out the catalyst protection control based on the acquired exhaust temperature and a second predetermined temperature that differs from the first predetermined temperature.