电液式可变气门系统的仿真与实验优化

发布时间：2017-12-27 13:17

本文关键词：电液式可变气门系统的仿真与实验优化　出处：《汽车工程》2016年05期 　论文类型：期刊论文

【摘要】：利用AMESIM软件建立电液可变气门机构模型,以研究关键参数如电磁阀特性、液压缸直径、供油压力、油泵流量、蓄能器容积和进回油管直径等对气门升程特性的影响,结果表明,液压缸直径与进回油管直径存在最优值,分别为16和6mm。在此基础上建造了电液可变气门系统试验平台,对气门落座速度进行优化。结果表明,采用多脉冲信号控制使落座速度由1.43降至0.82m/s时,其所对应发动机转速由2 370降至1 497r/min,难以满足要求。利用单向节流阀进行节流可以使落座速度降至0.3m/s,但因回落过程一直存在节流损失,回落时间较长,与此对应发动机转速为1 130r/min。采用开关电磁阀与单向节流阀并联策略,可在有效降低落座速度的同时,缩短气门回落时间,在供油压力为15MPa,落座速度为0.3m/s条件下,该系统可满足柴油机2 500r/min工况的需求。
[Abstract]:The establishment of the electro-hydraulic variable valve mechanism model using AMESIM software to study the key parameters such as electromagnetic valve characteristics, hydraulic cylinder diameter, oil pressure, oil flow, energy storage effect, volume and return pipe diameter range of valve lift characteristics. The results show that the diameter of the hydraulic cylinder and the back into the tubing diameter has an optimal value, respectively. 16 and 6mm. Based on the construction of electrical test platform for hydraulic variable valve system, the valve seating speed optimization. The results show that the pulse signal to control the seating velocity from 1.43 to 0.82m/s, the corresponding engine speed from 2370 to 1 497r/min, it is difficult to meet the requirements. The use of one-way throttle valve throttle can make the seating velocity to 0.3m/s, but because there has been a decline of the throttle loss, down time is longer, and the engine speed is 1 130r/min. The solenoid valve and a one-way throttle valve in parallel strategy, can effectively reduce the valve seating velocity at the same time, shorten the down time, the oil supply pressure is 15MPa, the seating velocity is 0.3m/s, the system can meet the demand of diesel engine speed of 2 500r/min.
【作者单位】：天津大学内燃机燃烧学国家重点实验室;
【基金】：国家自然科学基金(51320105008) 国家973重点基础研究发展项目(2013CB228402)资助
【分类号】：TK403
【正文快照】： 可变气门技术改变了传统发动机固定气门运动前言规律,在不同转速和负荷下实现发动机外部进气状态和内部热力状态的优化,是提高进气充量、降低泵气损失、改善燃油经济性和排放的有效手段,对可变周期。气门技术的研究成为国内外内燃机技术研究热本文中针对电液可变气门机构在

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