高压共轨式电控燃油喷射系统毕业设计

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1、摘要 I 摘要 高压共轨式电控燃油喷射系统因为在控制喷油量、喷油压力、喷 油正时及喷油率等方面所表现出的极大的灵活性而具有传统燃油系 统和其它电控喷油系统无法比拟的优势，代表了柴油机电控喷油技 术的发展方向。电控液压喷油器是高压共轨系统中最关键的部件， 高压共轨喷油系统的优良性能必须通过喷油器来实现。 论文综述了柴油机电控喷油系统的分类和发展 ，详细介绍了高 压共轨系统的特点和原理以及国外的典型系统，尤其对国外有代表 性的电控液压喷油器的结构和原理作了全面的比较和分析。论文介 绍作者参考国内外高压共轨喷油器的典型结构和原理而设计的一种 电控液压喷油器。阐述该喷油器的特点，分析喷油器主要部件的特

2、 性和要求，分析喷油器的驱动电路，计算该喷油器关键零部件的重 要参数。最后结合相关数据，绘制了喷油器的装配图与零件图，确 定了喷油器各部分的材料与工艺要求。该喷油器能够实现先缓后急 的喷油规律，达到降低有害排放物的目标。 关键词关键词：柴油机, 高压共轨, 电控液压喷油器, 电路分析，参数计算 摘要 II Abstract The high pressure common rail injection system possesses the excellent ability to improve the emission and economic performance of diesel

3、 engines, it presents the developing direction of fuel injection system for diesel engine and is the necessary way to make diesel engine reach more rigorous emission laws. The electro-hydraulic injector is one of the most important components of high pressure common rail injection system, the latter

4、 must rely on it to realize its excellent functions. Based on consulting and researching extensive related literatures issued by international and domestic organizations, this paper summarizes the history of electronic controlled fuel injection system of diesel engine, the principle and advantages o

5、f high pressure common rail injection system and its representative products of foreign countries, then introduces the structure and principle of representative electro-hydraulic injector made by west developed countries in details. In this paper, an electro-hydraulic injector designed by the author

6、 is introduced detailedly. The paper summarizes the injectors working principle、features and performance characteristic and analyzes the driver circuit of the injector，the important parameters of the injector were carried out through analysis and calculating. Finally, according to relevant data, rendering the injector assembly drawings and parts drawings, identify the material and technological requirements of various parts of the injector。This injector can realize the perfect fuel injection r