Method of controlling regeneration of PF for vehicle

A vehicle of controlling regeneration of a particulate filter (PF), the vehicle comprising:

• an engine;
• the PF connected to the engine, wherein exhaust gas ejected from the engine passes through the PF;
• a sensor mounted in the PF;
• and
• a controller to determine a quantity of the particulate matters (PMs) accumulated in the PF,
• wherein the controller is configured for:
• determining whether the quantity of PMs accumulated in the PF is at or above a risk level at which damage to the PF is caused when regenerating the PF, the quantity thereof being in accordance with a sensor-measured value;
• calculating a driving condition index by accumulating a weighting factor for a driving condition under which there is a likelihood of causing the damage to the PF, based on an amount of exhaust gas flowing from the engine and a concentration of oxygen in the exhaust gas when the quantity of the accumulated PMs is at or above the risk level at which the damage to the PF is caused;
• calculating a temperature index in accordance with a temperature of the PF and a PM index in accordance with the quantity of the accumulated PMs when the quantity of the accumulated PMs is at or above the risk level at which the damage to the PF is caused;
• calculating a degradation condition index considering the driving condition index, the temperature of the PF and the quantity of the PMs accumulated in the PF;
• and
• changing a regeneration period of the PF according to the degradation condition index,
• wherein the degradation condition index is adjusted such that, the higher the degradation condition index, the more increased the quantity of the PMs accumulated in the PM, and thus the regeneration period of the PF is shortened.