Control apparatus for compression-ignition type engine

An apparatus for controlling an engine that includes:

• a cylinder;
• and an injector and an ignition plug disposed in a manner to face the cylinder, the control apparatus for a compression-ignition type engine comprising:
• a swirl adjustment device that adjusts a swirl flow generated in the cylinder;
• a temperature adjustment device that adjusts an in-cylinder temperature as a temperature in the cylinder;
• and
• a controller that includes an electric circuit electrically connected to the injector, the ignition plug, the swirl adjustment device, and the temperature adjustment device and that outputs a control signal to each of said injector, the ignition plug, the swirl adjustment device, and the temperature adjustment device,
• wherein the controller has:
• an injection control section that drives the injector at specified timing corresponding to an operation state of the engine so as to inject fuel;
• an in-cylinder temperature adjustment section that drives the in-cylinder temperature adjustment device to adjust the in-cylinder temperature such that air-fuel mixture of the fuel injected by the injector and air is subjected to flame propagation combustion by spark ignition using the ignition plug and that compression self-ignition combustion is carried out after initiation of this flame propagation combustion;
• a first ignition control section that drives the ignition plug for the spark ignition after the injector injects the fuel;
• a second ignition control section that drives the ignition plug for the spark ignition after the spark ignition by the first ignition control section so as to subject the air-fuel mixture to the flame propagation combustion by said spark ignition;
• and
• an ignition timing setting section that sets timing of the spark ignition by the first ignition control section to be more retarded when the swirl flow is gentle than when the swirl flow is strong on the basis of a control amount of the swirl adjustment device.