Regeneration is the process of burning off the accumulated soot in the particulate filter to prevent blockage and maintain the filter's efficiency. This can be achieved through passive or active regeneration methods. Passive regeneration occurs naturally when the exhaust temperature is sufficiently high to oxidize the soot. In contrast, active regeneration involves external interventions, such as injecting fuel into the exhaust stream or using an electric heater, to raise the temperature and initiate soot oxidation.
