PSVC三级可移动气门升程系统的运动学是建立在PDVC持续可变气门升程的基础上。该系统简单,内燃机的油耗和排放水平可降低5%。在今后的几十年中,内燃机将继续占据汽车动力系统市场的较大份额。其中大部分发动机是带有2个顶置凸轮轴的四缸直列发动机(铸铝气缸盖)。降低成本、提高燃烧过程的效率以及减小机械损耗都是发动机开发商的主要目标。另外,降低磨损、轻量化、采用可变气门传动系统,可使得发动机在 The kinematics of PSVC three-stage moveable valve lift system is based on the continuous variable valve lift of PDVC. The system is simple, the internal combustion engine fuel consumption and emission levels can be reduced by 5%. In the coming decades, internal combustion engines will continue to occupy a larger share of the automotive powertrain market. Most of these engines are four-cylinder in-line engines with two overhead camshafts (cast aluminum cylinder heads). Reducing costs, improving the efficiency of the combustion process, and reducing mechanical losses are all major goals for engine developers. In addition, to reduce wear and weight, using a variable valve drive system that allows the engine at