CPC F01L 1/047 (2013.01) [F01L 1/12 (2013.01); F02D 13/0207 (2013.01); F01L 2001/0473 (2013.01); F01L 2305/00 (2020.05)] | 18 Claims |
1. A continuous variable valve duration apparatus comprising:
a camshaft;
a cam unit on which a cam is formed, and the camshaft is inserted into the cam unit;
a guide bracket including an upper guide boss;
an inner wheel configured to transmit rotation of the camshaft to the cam unit;
a wheel housing including a guide shaft having a guide thread, the guide shaft being configured to be movably inserted into the upper guide boss, and the wheel housing further including a tail guide configured to guide relative movement of the guide bracket, and wherein the inner wheel is rotatably inserted into the wheel housing;
a worm wheel having an inner thread formed on an inside of the worm wheel, wherein the inner thread is configured to engage with the guide thread, and having an outer thread formed on an outside of the worm wheel;
a control shaft having a control worm engaged with the outer thread;
a tolerance adjusting portion formed to the guide bracket at a position corresponding to the tail guide; and
a tolerance adjusting pin inserted into the tolerance adjusting portion.
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