Control device for internal combustion engine

A control device for an internal combustion engine for controlling an internal combustion engine provided with:

• an engine body;
• and
• a fuel injector injecting fuel into a combustion chamber of the engine body,
• the control device comprising a combustion control part configured to sequentially inject at least a primary auxiliary fuel, secondary auxiliary fuel, and main fuel from the fuel injector in predetermined operating regions, cause compressive ignition sequentially from a premix containing the primary auxiliary fuel after injection of the main fuel, and cause compressive ignition of a premix containing the main fuel using heat generated when causing compressive ignition of a premix containing the secondary auxiliary fuel,
• the combustion control part configured so as to set a target injection amount and target injection timing of the primary auxiliary fuel so that a peak value and a slant at the start of combustion of a heat generation rate pattern formed by the premix containing the primary auxiliary fuel is smaller than peak values and slants at the start of combustion of heat generation rate patterns formed by the premixes containing the secondary auxiliary fuel and the main fuel.