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首页> 外文期刊>Advances in Mechanical Engineering >Simulation and experimental research of hydraulic pressure and intake valve lift on a fully hydraulic variable valve system for a spark-ignition engine:
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Simulation and experimental research of hydraulic pressure and intake valve lift on a fully hydraulic variable valve system for a spark-ignition engine:

机译：火花点火发动机全液压可变气门系统上的液压和进气门升程的仿真和实验研究：

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摘要

A fully hydraulic variable valve system based on spark-ignition engine BJ486EQ is introduced in this article, which can provide fully variable valve lifts, valve timing, and valve opening duration. A simulation model of fully hydraulic variable valve system is established, which is verified through experimental intake valve lift and hydraulic pressure. It is found that pressure fluctuation in hydraulic system of fully hydraulic variable valve system becomes greater with the increase in engine speed, which even leads to “lift distortion.” The cam profile of fully hydraulic variable valve system and the structure of the throttling valve which is used to reduce valve seating speed are optimized by simulation. The lift distortion and rebound do not occur in the optimized fully hydraulic variable valve system, which is indicated by the results of simulation and experiments when the engine speed is 5000?r/min, and valve seating characteristics become stable and soft.
机译：本文介绍了一种基于火花点火发动机BJ486EQ的全液压可变气门系统，该系统可提供全可变气门升程，气门正时和气门开启持续时间。建立了全液压可变气门系统的仿真模型，并通过实验进气门升程和液压压力进行了验证。结果发现，随着发动机转速的提高，全液压可变气门系统的液压系统中的压力波动会更大，甚至会导致“升程变形”。通过仿真优化了全液压可变阀系统的凸轮轮廓和用于降低阀座速度的节流阀的结构。优化的全液压可变气门系统不会发生升程变形和回弹，当发动机转速为5000？r / min且气门座特性变得稳定而柔和时，仿真和实验结果表明了这一点。

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