Control apparatus for hybrid vehicle

A control apparatus for a hybrid vehicle comprising:

• an engine as a first driving source for driving the vehicle, the engine being configured to support a deactivation operation in which an intake valve and an exhaust valve are closed;
• a motor as a second driving source for driving the vehicle;
• a power generator driven by the engine;
• and
• an electric storage device for storing regeneration energy from the power generator and the motor,
• the control apparatus comprising:
• a drive mode determination device that determines one drive mode from a plurality of drive modes based on a status of the vehicle, wherein the drive modes comprise:
• an engine stop motor drive mode in which the vehicle is driven by a driving force from the motor while stopping the engine;
• an idle cylinder deactivation motor drive mode in which the vehicle is driven by the driving force from the motor by operating the power generator as an electric motor by running the engine while maintaining the engine deactivated;
• and
• an engine drive mode in which the vehicle is driven by a driving force from the engine;
• and
• a transition rate modification device that, when it is determined by the drive mode determination device that a mode transition from a current drive mode to another drive mode should take place, modifies a transition rate for transitioning from the current drive mode to the another drive mode according to the drive mode to be transitioned.