Patent ID: 8033103

Claim:
An exhaust purification device comprising: an occlusion purification part that occludes a specific component contained in exhaust gas under an occlusion condition and that purifies and discharges the occluded exhaust component under a purification condition; a full recovery device that, at each of plural separated intervals, performs main recovery processing for discharging substantially an entire portion of the exhaust component occluded in the occlusion purification part based on establishment of a first execution condition of the main recovery processing to recover exhaust purification performance of the occlusion purification part; and a partial recovery device that performs partial recovery processing for discharging only part of the exhaust component occluded in the occlusion purification part based on a different second execution condition at times other than execution of the main recovery processing; wherein at least one requirement for the establishment of the execution condition of the main recovery processing is that the partial recovery processing by the partial recovery device has been executed a number of times equal to or greater than a predetermined number since the first partial recovery processing if the main recovery processing has not yet been performed or since the last main recovery processing if the main recovery processing has been performed.