Engine control system including dual continuous variable valve duration device and GPF forced regeneration method using the engine control system

An engine control system with a dual continuously variable valve duration device, the engine control system comprising:

• an engine including,
• a combustion chamber,
• an intake valve provided in the combustion chamber to selectively supply air or a mixture of air and fuel to the combustion chamber,
• an ignition plug mounted in the combustion chamber to ignite and burn the mixture, and
• an exhaust valve provided in the combustion chamber to selectively discharge an exhaust gas in the combustion chamber to an outside of the combustion chamber;
• the dual continuously variable valve duration device configured to adjust an intake duration of the intake valve and an exhaust duration of the exhaust valve;
• a turbine mounted downstream of the engine and configured to pass therethrough the exhaust gas discharged from the engine and to discharge the exhaust gas with pressure by rotation thereof;
• a warm-up catalyst (WCC) mounted downstream of the turbine and mounted on an exhaust pipe connecting the engine and the turbine to preheat the exhaust gas;
• a gasoline particulate filter (GPF) mounted downstream of the warm-up catalyst on the exhaust pipe to filter out soot contained in the exhaust gas;
• and
• a controller operably connected to the ignition plug and the dual continuously variable valve duration device and configured to adjust an ignition timing of the ignition plug, the intake duration, and the exhaust duration based on a driving condition of a vehicle,
• wherein under a condition that lambda (λ) is 1, the controller is configured to adjust the exhaust duration and to perform control so that an exhaust valve open (EVO) timing is retarded, and an intake valve close (IVC) timing is maintained to maintain a valve overlap period, and
• wherein the retardation of the EVO timing is set to −189° to −149° based on a top dead center (TDC.