Patent ID: 8667784

Claim:
An exhaust gas purification apparatus for a diesel engine mounted on a vehicle, the exhaust gas purification apparatus comprising: a regenerative diesel particulate filter arranged in an exhaust gas passage of the diesel engine; an accumulated amount detector configured to detect an amount of accumulated matter in the filter; an exhaust gas temperature raising unit configured to raise a temperature of an exhaust gas; and a forcible regeneration control unit configured to: determine to enable or disable complete automatic regeneration; raise, in response to the complete automatic regeneration being enabled, the exhaust gas temperature using the exhaust gas temperature raising unit to forcibly burn the accumulated matter and regenerate the filter; measure, in response to the diesel engine operating, an automatic regeneration enable time being a time that satisfies an automatic regeneration condition for completely regenerating the filter; determine, using the automatic regeneration enable time, whether or not a probability that a regeneration will be completed without being interrupted during a single period in which the automatic regeneration condition is continuously satisfied is greater than a predetermined threshold; and perform, in response to the probability of regeneration being completed being greater than the predetermined threshold, the complete automatic regeneration while the vehicle is traveling or operating.