Engine control system provided with dual continuously variable valve duration device and method of GPF forcible regeneration using the same

A method of gasoline particulate filter (GPF) forcible regeneration using an engine control system provided with a dual continuously variable valve duration device, the method comprising:

• starting a vehicle;
• determining, by a controller, whether an accumulated driving distance (or odometer (ODO)) is greater than a mileage set value, and an engine coolant temperature is less than a temperature set value;
• determining, by the controller, a time required for the GPF forcible regeneration in response to determining when it is determined that the accumulated driving distance is greater than the mileage set value, and the engine coolant temperature is less than the temperature set value;
• determining, by the controller, whether a vehicle speed is greater than a speed set value and a real-time torque model value is greater than a torque set value;
• performing, by the controller, exhaust valve opening (EVO) retardation control and fuel rich (A/F Rich) injection in response to determining that the vehicle speed is greater than the speed set value and the real-time torque model value is greater than the torque set value;
• performing, by the controller, the GPF forcible regeneration by performing fuel cut or fuel lean (A/F lean) injection;
• determining, by the controller, whether an accumulated time for the GPF forcible regeneration is greater than a time required for the forcible regeneration;
• and
• ending, by the controller, the forcible regeneration and performing a normal operation in response to determining that the accumulated time for the GPF forcible regeneration is greater than the time required for the forcible regeneration.