Patent ID: 8539756

Claim:
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.