Method for extended driving mode of hybrid vehicle and extended driving mode system thereof

A method for extended driving mode of a hybrid vehicle mounted with a cylinder of an engine deactivation (CDA) device, including:

• controlling to perform an idle state switching of cylinders of an engine,
• wherein the controlling to perform the ideal state switching of the cylinders is implemented by a CDA mode control through a controller;
• and
• wherein the CDA mode control when the engine of the hybrid vehicle is stopped includes:
• selecting, by the controller, an electric vehicle (EV) mode in which a motor is used as a power source and a regenerative braking mode in which power generation is performed by the motor;
• performing, by the controller, CDA mode switching in association with a variable valve control mechanism;
• performing, by the controller, CDA mode application for switching the cylinders of the engine into an idle mode, and
• switching, by the controller, a CDA non-operation control not to operate the variable valve control mechanism when the electric vehicle (EV) mode or the regenerative braking mode are not selected.