Cylinder deactivation apparatus of engine

A cylinder deactivation apparatus of an engine, the apparatus configured to selectively deactivate at least one of a plurality of cylinders in accordance with an operation state of an engine, the cylinders configured to receive intake air from an intake manifold, the apparatus comprising:

• at least one deactivation intake port having first and second ends, the first end communicating with the intake manifold;
• an intake channel connecting the second end of the deactivation intake port to the at least one of the cylinders that is selectively deactivated;
• a deactivation throttle valve disposed in the deactivation intake port and configured to selectively open or close the deactivation intake port;
• and
• a controller configured to control an operation of the deactivation throttle valve,
• wherein the controller is configured to selectively open or close the deactivation intake port by operating the deactivation throttle valve in accordance with the operation state of the engine, such that intake air is selectively supplied to the at least one of the cylinders.