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1·Continuously Variable Valve Actuation system.

连续可变气门驱动系统。

2·It also introduces the VTEC structure and operating principles of the variable valve actuation adopted by Honda company.

着重介绍了本田公司的可变气门驱动机构VTEC的结构和工作原理。

3·Electromagnetic control valve actuation is a new kind of variable valve timing technology. It can offer more advantages than general camshaft valve actuation when used in the engine.

电磁控制进排气门是一种新型的可变配气相位技术，在发动机上以电磁驱动气门比传统的凸轮驱动方式具有更大的优越性。

4·Test results show that the hydraulic valve actuation system can realize continuously variable valve lift and the early intake valve closing by changing the time of oil pressure release.

通过实验证明这种液压气门机构可通过改变泄油初始相位角实现进气门最大升程和进气迟闭角的连续可变。