Method for regenerating exhaust gas filter for vehicle

A method for regenerating an exhaust gas filter for a vehicle, the method comprising the steps of:

• confirming an initial amount of soot that is a current amount of soot in the filter when a regeneration execution command is inputted from the vehicle;
• executing a service regeneration control mode for regenerating the filter by oxidizing the soot in the filter, and calculating a removal amount of soot during the execution of the service regeneration control mode;
• confirming and monitoring a current remaining amount of soot based on information on the initial amount of soot and information on the calculated removal amount of soot during the execution of the service regeneration control mode;
• comparing the current remaining amount of soot with a predetermined target remaining amount in a condition in which a time accumulated and counted after the execution of the service regeneration control mode does not reach a predetermined first allowable time;
• maintaining the execution of the service regeneration control mode until the remaining amount of soot reaches the target remaining amount in the condition that the accumulated and counted time does not reach the first allowable time when the current remaining amount of soot exceeds the target remaining amount;
• and
• executing a heat-damage prevention control mode for inhibiting heat-damage of peripheral parts of the filter by lowering filter temperature and reducing an amount of oxygen supplied to the filter, when the current remaining amount of soot exceeds the target remaining amount and the accumulated and counted time reaches the first allowable time during the execution of the service regeneration control mode.