Continuous variable valve duration apparatus and engine provided with the same

A continuous variable valve duration apparatus including:

• a camshaft;
• a cam device on which a cam is formed, of which the camshaft is configured to be inserted thereto and of which a relative phase angle with respect to the camshaft is variable;
• an internal bracket transmitting a rotation of the camshaft to the cam device;
• a wheel housing in which the internal bracket is rotatably inserted, on which a guide groove parallel to the camshaft is formed, and on which a guide hole vertical to the camshaft is formed;
• a guide portion including a guide shaft inserted into the guide hole for guiding a movement of the wheel housing;
• and
• a control portion including a control shaft disposed parallel to the camshaft and inserted into the guide groove, and the control portion selectively rotating the control shaft for a relative position of the wheel housing with respect to the camshaft to be changed,
• wherein a first sliding hole and a second sliding hole are formed at the internal bracket respectively, and a cam slot is formed at the cam device, and
• wherein the continuous variable valve duration apparatus further includes:
• a slider pin connected to the camshaft and rotatably inserted into the first sliding hole;
• and
• a roller cam slidably inserted into the cam slot and rotatably inserted into the second sliding hole.