valve actuation

基本解释

Continuously Variable Valve Actuation system.
连续可变气门驱动系统。
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Transitional process of an electromagnetic valve actuation (EVA) is studied with experimental method to reduce valve seating velocity.
以一个发动机电磁气门驱动（EVA）装置为对象，采用试验方法研究EVA过渡过程。
The main problems of the camshaftless valve actuation are long response time, hard valve landing, high power consumption and complex, high priced actuation system.
无凸轮轴气门驱动的主要问题是响应速度不够高、气门落座冲击、能耗过高以及驱动系统复杂昂贵。