Continuous variable valve duration apparatus and engine provided with the same

A continuous variable valve duration apparatus comprising:

• a camshaft;
• first and second cam portions on which a cam is formed respectively, the camshaft being inserted into the first and second cam portion such that relative phase angles with respect to the camshaft are variable;
• first and second inner brackets configured to transmit rotation of the camshaft to the first and second cam portions respectively;
• a slider housing in which the first and the second inner brackets are rotatably inserted, wherein a first guiding portion is formed on an upper portion of the slider housing, and a second guiding portion vertical to the first guiding portion is formed on the slider housing;
• a control shaft parallel to the camshaft, and a control rod eccentrically formed on the control shaft;
• a guide head on which a head guiding portion and a head hole are formed, wherein the head guiding portion is slidably connected to the first guiding portion, and the control rod is rotatable insert into the head hole;
• a cam cap configured to support the control shaft;
• a cam cap guiding portion mounted to the cam cap and guiding movement of the slider housing;
• and
• a control portion configured to selectively rotate the control shaft such that the slider housing is moved along the cam cap guiding portion.