在任何高速发动机中,设计气门传动机构常常需要解决大量复杂的问题。其中之一是在高速运转时气门传动链的分离、飞脱(jump)及反弹(bounce),而其它问题则是弹簧波动(surge译者注或译为喘振,)及凸轮与挺柱的磨损。使得设计变为如此困难的原因在于几乎所有提高功率输出的改进必然会导致上述对发动机来说是致命性的故障。近几年来,重 In any high-speed engine, designing valve actuators often requires solving a large number of complex problems. One of these problems is the separation, jerkiness and bounce of the valve train during high speed operation, while other problems are spring fluctuations (surge) and cam and tappet Wear and tear The reason why the design has become so difficult is that almost any improvement in power output inevitably leads to the fatal failures described above for the engine. In recent years, heavy