Control device for compression ignition-type engine

A control device for a compression ignition engine, the control device comprising:

• an engine body including a cylinder;
• a fuel injection valve configured to directly inject fuel into the cylinder;
• an ozonator configured to generate ozone to be introduced into the cylinder;
• and
• a controller configured to operate the engine body by compression ignition combustion of an air-fuel mixture in the cylinder when the engine body operates in a predetermined compression ignition range, wherein
• when the engine body operates in a low load range with a load lower than a predetermined load in the compression ignition range, the controller sets a time of fuel injection with the fuel injection valve in a first half of a compression stroke or earlier, and allows the ozonator to introduce the ozone into the cylinder, and
• when the engine body operates in the low load range, the controller controls an ozone concentration to be lower at a higher speed than at a low speed.