Patent ID: 7082912

Claim:
A desmodromic valve actuation system for opening and closing at least one valve of an engine, said system comprising: a cam assemblage, said cam assemblage including a cam mechanism for rotational movement; a driving mechanism for reciprocal movement along a first line of action operably connected to said cam mechanism; said driving mechanism also being operably connected to the at least one valve of the engine to move the at least one valve along a second line of action in a plane substantially non-parallel with said first line of action between a valve closed position and a valve open position and between said open position and said closed position in a manner directly related to said rotational movement of said cam mechanism, wherein said driving mechanism being further capable of maintaining the at least one valve in said closed position while said cam mechanism continues its rotational movement; and the at least one valve being moved between said closed position and said open position and between said open position and said closed position without the intervention of any spring action; and a mechanical control unit operably connected to said cam assemblage, said mechanical control unit indexes said cam assemblage to predetermined rotational phase angles, whereby the rise, fall, and dwell of the at least one valve can be time synchronized and varied.