Exhaust purification device for internal combustion engine

An exhaust purification device for an internal combustion engine comprising:

• a particulate filter;
• an exhaust temperature detection means detecting a downstream-side exhaust temperature of the particulate filter;
• an exhaust differential pressure detection means calculating a differential pressure between an upstream-side exhaust pressure of the particulate filter and a downstream-side exhaust pressure of the particulate filter;
• a notification means performing notification based on the state of the particulate filter;
• and
• a control means controlling the internal combustion engine,
• characterized in that
• the control means is connected to the exhaust temperature detection means, the exhaust differential pressure detection means and the notification means, and
• the control means is programmed to calculate a differential pressure variation based on a first differential pressure detected at a predetermined time and a second differential pressure detected after the predetermined time, and when the differential pressure variation is not less than a reference variation, or when the downstream-side exhaust temperature is not less than a reference temperature for a reference time or longer, the control means is programmed to request a stop of the driving of the internal combustion engine by the notification means or stop the driving of the internal combustion engine.