| 摘要 |
<p>The present invention relates to an internal combustion engine exhaust valve having a valve head including a valve face and a valve back, wherein the valve face is convex, a cylindrical valve stem, and a rim that includes a valve seat; an exhaust valve assembly for an internal combustion engine that includes the exhaust valve of the present invention and an exhaust chamber; and an internal combustion engine including such an exhaust valve assembly. The present invention also relates to a method of increasing the efficiency of an internal combustion engine that involves providing an exhaust valve having a convex valve head and installing such an exhaust valve in an internal combustion engine, thereby increasing the efficiency of the engine.</p> |
