DIESEL ENGINE CONTROL APPARATUS, DIESEL ENGINE CONTROL METHOD, AND METHOD FOR DESIGNING DIESEL ENGINE CONTROL APPARATUS

[Objective] To suppress torque variation, etc. when a diesel engine is switched to premixed combustion. [Means for Solution] Wen the diesel engine is switched to premixed combustion in a state in which EGR is being performed, the interior of a cylinder of the diesel engine is heated by a cylinder heater. Also, at least fuel injection timing control for the diesel engine is performed.