Regeneration control device for exhaust purification device

A regeneration control device for an exhaust purification device in an engine with a turbo-supercharger having the exhaust purification device equipped with a filter that traps particulate matters in exhaust gas discharged from the engine, the regeneration control device for the exhaust purification device comprising:

• a regeneration controller that executes regeneration control in which particulate matters trapped by the filter are removed by combustion;
• a post-injection controller that during the regeneration control, executes control in which a post-injection time period of fuel executed subsequently to a main injection time period of fuel is advanced such that a supercharging pressure of the turbo-supercharger becomes higher than a supercharging pressure during steady operation;
• and
• an excessive temperature rise determinator that determines a possibility or an impossibility of an excessive temperature rise of the filter in the regeneration control via an exhaust temperature detector, wherein
• the post-injection controller executes a control for advancing the post-injection time period only when the excessive temperature rise of the filter in the regeneration control is determined via the excessive temperature rise determinator.