Patent ID: 6952918

Claim:
A regeneration control method for regenerating a filter in a continuously regenerating-type diesel particulate filter device, for capturing particulate matters in exhaust gas from an engine and oxidizing and removing the captured particulate matters, comprising: determining a state of clogging of the filter at three classified stages of clogging of the filter; performing no regeneration-mode operation when the state of clogging of the filter is at a first state of clogging; when the state of clogging of the filter is at a second state of clogging, performing a first regeneration-mode operation only when an index temperature for regeneration control is not greater than or equal to a prescribed first judgment temperature; and when the state of clogging of the filter is at a third stage of clogging, performing a second regeneration-mode control accompanying a first exhaust-temperature heating up control without a post-injection when the index temperature for regeneration control is lower than a prescribed second judgment temperature, while performing a second regeneration-mode control accompanying a second exhaust-temperature heating-up control with a post-injection when the index temperature for regeneration control is greater than or equal to the prescribed second judgment temperature.