【作者】 黄茂杨；

【导师】 翟羽健；

【作者基本信息】 东南大学 ， 精密仪器及机械， 2005， 博士

【副题名】高速电磁阀结构与控制参数优化及其特性测试系统的研制

【摘要】 高压共轨燃油喷射系统是现代柴油机电控燃油喷射系统的先进技术,使柴油机能够满足日趋严格的排放法规要求,同时可提高其经济性和舒适性。本论文以一汽集团《柴油机高压共轨燃油喷射系统》科研项目为依托,采用理论计算,计算机仿真与实验分析相结合的方法,研究高压共轨喷油器用高速电磁阀结构设计与控制参数的优化,并重点研制了能够适用于样品设计与改进,产品性能检测的高速电磁阀静态及动态特性测试系统。本课题研究工作对提升我国柴油机高压共轨燃油喷射系统的自主开发能力具有重要的理论意义和工程应用价值。论文的主要内容有:(1)分析了柴油机高压共轨燃油喷射系统对高速电磁阀的性能要求。根据电磁学理论建立了电磁阀静态吸力特性数学模型。阐述了高速电磁阀的工作机理,将高速电磁阀分为“电”、“磁”、“机”、“液”四个子系统,并结合电磁阀实际工作过程,建立了电磁阀动态响应过程数学模型,研究了电磁阀磁滞和涡流效应对电磁阀性能的影响。(2)根据高速电磁阀静态特性和动态响应特性数学模型,开发了高速电磁阀性能仿真系统。对给定的结构和控制参数的电磁阀的静态吸力特性和动态响应特性进行了仿真研究。(3)对影响高速电磁阀性能的主要结构参数和控制参数进行了分析,为电磁阀的结构设计和控制方法的拟定提供了理论依据。根据电磁阀结构和控制参数对电磁阀性能的影响规律,采用遗传算法对高速电磁阀进行了设计优化,取得了良好效果。(4)研制了高速电磁阀静态特性测试系统。构建了系统台架,设计了基于磁平衡式霍尔电流传感器的高速电磁阀脉冲电流发生器,开发了测试系统软件。所开发的测试系统精度高,操作方便,功能齐全,达到了设计指标。(5)研制了基于激光位移传感器的高速电磁阀动态响应特性测试系统。构建了系统台架和电磁阀预紧弹簧刚度测量机构,设计了基于功率吸收原理和可变脉宽升压逆变技术的电磁阀动态电流驱动器,实现了对驱动器参数的智能控制,满足了对电磁阀动态特性试验的多样性要求。开发了测试系统软件,提出了基于小波分析的方法,对试验所得衔铁位移响应信号和驱动电流信号进行了滤波。(6)对高速电磁阀样品进行了试验研究,给出了试验结果,并对试验结果进行了分析,表明理论研究与试验结果相符合。更多还原

【Abstract】 High-pressure common rail injection system is the advanced technology of modern electronic injection system of diesel engine; it not only enables the diesel engine to meet the increasingly strict emission criterion, but also enhances its economic efficiency and comfortability. On the basis of the project“High-pressure Common Rail Injection System for Diesel Engine”of FAW, the dissertation is an attempt to research on optimization of structural design and control parameters of high-speed solenoid valve, as well develop the static and dynamic performance testing systems of high-speed solenoid valve applicable to the design and improvement of the sample and the examination of the product’s performance, by employing the joint methods of theoretical computation, computational simulation and experimental analysis. The research work in this dissertation has important theoretical and engineering application value for promoting the self-development ability on high-pressure common rail injection system in our country.The main research contents are presented as follows:(1) The analysis of the performance requirement of high-pressure common rail injection system towards high-speed solenoid valve. The mathematical model of the static electromagnetic force performance of the solenoid valve is established according to the electromagnetic theory; the solenoid valve is divided into four sub-systems: electronic, magnetic, mechanical and hydraulic; the mathematical model of dynamic solenoid valve response process is established and the hysteresis and vortex effect are studied in consideration of the actual working process of the solenoid valve.(2) Development of the simulation system of the solenoid performance on the basis of the mathematics model, and simulation research on the performance of static electromagnetic force and dynamic response of the solenoid valve of given structure and control parameters.(3) Analysis on the major structure and control parameters affecting the performance of the solenoid valve, so as to provide theoretical basis for working out its structure design and control method. Genetic algorithm is introduced to design and optimize the solenoid valve according to the regulation of the impact of the structure and control parameters on the performance of the solenoid valve; fine effect is achieved.(4) Development of the static performance testing system of the solenoid valve, including setting up the system platform, designing impulse electric current generator of the solenoid valve on the basis of magnetic balanced Hall-current sensor, and developing testing system software. The developed testing system is up to the designing standard with its high accuracy, complete functions and convenience for operation.(5) Development of dynamic performance testing system of the solenoid valve on the basis of laser displacement sensor. Including setting up system platform and measuring structure of the rigidity of pretension spring of the solenoid valve, designing the dynamic electric-current driver on the basis of power sink principal, variable pulse width modulation of voltage boosting and inversion technology, realizing the intelligence controlover the control parameters, satisfying the diversity requirement towards the dynamic feature experiment of the solenoid valve; furthermore, testing system software is developed, and filtering is conducted over the signals of armature displacement response and driving current educed from the experiment using wavelet analysis technology.(6) Experimental research on the sample of the solenoid valve; presentation of the experiment outcome and its related analysis to demonstrate its conformity to the theoretical research.更多还原