本文简要介绍了可变气门正时(VVT)及可变升程技术，提出了一种简单而实用的新型凸轮结构。
This paper gives a brief introduction on the technology of variable valve timing (VVT) and variable-lift, and brings forward a new CAM structure which is simple and practical.
介绍了可变进气道长度、可变气门升程及可变气门定时等提高充气效率的先进技术。
It introduces some advanced technologies which increase the charging efficiency, such as the variable length of the intake duct, the variable valve stroke, the variable valve timing and so on.
本文采用粒子图像测速技术研究了汽油机在不同气门升程下的气体流动规律。
In this paper, PIV (Particle Image Velocimetry) is applied to study the characteristic of in-cylinder flow field under different valve lifts.
全可变气门机构能实现发动机配气定时和气门升程的连续可变，是可变气门技术的发展趋势。
Fully variable valve train may realize continuously variable valve timing and valve lift, and so it represents development trend of variable valve technology.
全可变气门机构能实现发动机配气定时和气门升程的连续可变，是可变气门技术的发展趋势。
Fully variable valve train may realize continuously variable valve timing and valve lift, and so it represents development trend of variable valve technology.
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