| 摘要 |
<p>An engine valve assembly includes an engine valve (12) connected to an electric motor (30). The electric motor may be a linear electric motor (34) which includes 'rare earth' magnets to infinitely move the engine valve (12) between an open and closed position.Usage of 'rare earth' magnets assures that the linear electric motor (34) generates enough force to properly and timely operate the engine valve (12.) The electric motor (30) may alternatively drive a threaded portion (42) of the valve stem (18.) Operation of the electric motor (30) threads the threaded valve stem (18) relative to a threaded support (40) to drive the engine valve (12') between an open and a closed position.</p> |
