| 摘要 |
<p>A system for an internal combustion engine having intake and exhaust valves for each engine cylinder spring-loaded to their closed positions, a cam operated valve train operating each of the valves with the valve train having a rocker lever 26 that is rockingly connected to a mounting stud 36 extending upwardly from the engine head, and hydraulic means 50 for varying the fulcrum position on the mounting studs about which the rocker lever rocks.</p> |
