Control device for compression ignition operation of internal combustion engine

A controller for an internal combustion engine capable of performing a compression ignition operation of the internal combustion engine that is controlled so that compression ignition is performed at an optimal timing by adjusting an amount of internal EGR gas, wherein the internal combustion engine includes a combustion chamber, and a fuel injector for injecting fuel directly in the combustion chamber;

• the controller comprising:
• an air pressure detecting unit configured to detect at least one of an ambient air pressure and an exhaust air pressure;
• and
• a fuel injection control unit configured to actuate the fuel injector to control a fuel injection timing according to a detected result by the air pressure detecting unit;
• wherein the fuel injection control unit advances the fuel injection timing as the detected result by the air pressure detecting unit is lowered.