Patent ID: 8616166

Claim:
An electric continuously variable valve timing apparatus comprising: a cam sprocket; a camshaft rotatably connected with the cam sprocket; a motor portion; a lead screw portion which is disposed within the motor portion, is screwed-engaged with the motor portion, and moves along a length direction of the camshaft according to operations of the motor portion; and a camshaft holder rotatably connecting the lead screw portion and the cam sprocket, wherein the camshaft holder moves along a length direction of the camshaft according to the movement of the lead screw portion and varies relative phase angle between the cam sprocket and the camshaft for controlling valve timing; wherein the motor portion includes a hollow motor shaft which is screwed-engaged with the lead screw portion and moves the lead screw portion along the length direction of the camshaft when the hollow motor shaft operates; wherein an end portion of the camshaft holder is inserted between the cam sprocket and the camshaft.