高压喷油器的控制特性研究及其驱动电路设计

发布时间：2018-01-14 02:09

本文关键词：高压喷油器的控制特性研究及其驱动电路设计　出处：《长安大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着汽车行业的不断发展,缸内直喷技术越来越多地运用于汽车的燃油喷射系统,而高压喷油器是缸内直喷技术的核心部件。它具有灵活而精确的控制方式,在环保和燃油经济性能方面具有很大的优势,受到了人们的青睐。高压喷油器的工作状况直接影响着汽车发动机的整体性能、燃油的利用率以及汽车尾气污染物的排放。首先,本文介绍了高压喷油器的结构和工作原理,分析了高压喷油器控制信号的特点,该信号由主脉冲和PWM保持波组成。然后结合其内部结构特点和工作原理,建立了高压喷油器的数学模型,推导出喷油器开启过程中所用时间与电压之间的关系式。接着利用AMESim液压仿真软件设计了高压喷油器的仿真模型,结合喷油器在开启过程中内部线圈电流变化的特点,详细分析了不同开启电压对高压喷油器开启速度及功耗的影响。其次,设计了高压喷油器的驱动系统,根据系统设计的要求与方案,实现了开启电压和脉宽可调的驱动电路设计。该驱动电路的测试结果满足系统设计的最初要求,能够控制高压喷油器进行分组、顺序喷射。符合汽车发动机的实际工作状况,为高压喷油器的实际功能研究提供了测试平台。最后,在实验室进行了高压喷油器的控制特性实验,记录了大量的实验数据和测试波形。通过对所测得的数据和波形进行分析,证明了前期理论仿真的正确性以及本文所设计的高压喷油器驱动系统的可靠性。
[Abstract]:With the continuous development of the automotive industry, GDI technology more and more widely used in automotive fuel injection system, and the high pressure injector is the core component of GDI engine. Its control mode is flexible and accurate, has great advantages in environmental protection and fuel economy performance, favored by the people. The working condition of high-pressure injector directly affects the overall performance of the automobile engine, and the rate of automobile exhaust emissions of pollutants using fuel. Firstly, this paper introduces the structure and working principle of high pressure injector, analyzed the characteristics of control signal of high pressure injector, the signal from the main pulse and PWM wave. Then keep the internal structure characteristics and working principle, established the mathematical model of high pressure injector, injector opening derived relationship between the time and the voltage used in the process of using AMESim liquid. The simulation model of high pressure injector pressure design simulation software, combined with the characteristics of the injector with open internal coil current changes in the process, a detailed analysis of the different effects of opening speed and power consumption of the turn-on voltage of the high pressure injector. Secondly, the driving system of high pressure injector design, according to the requirements of system design and realization scheme. The design of driving circuit turn-on voltage and pulse width adjustable. The driving circuit of the test results meet the initial requirements of system design, can control the high-pressure fuel injector group, sequential injection. According to the actual working condition of vehicle engine, provides a test platform for the actual function of high-pressure injector. Finally, the pressure control characteristic experiment the injector in the laboratory, a large number of experimental data and test waveforms were recorded. Based on the measured data and waveform analysis, proves the first period theory The correctness of the simulation and the reliability of the high voltage injector drive system designed in this paper.

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U464.136

【参考文献】