高压共轨喷油器关键结构参数对喷射性能影响的仿真分析

Simulation of the Influence of Key Structural Parameters of High-pressure Common Rail Injector on the Ejecting Per-formance

高压共轨喷油器是高压共轨喷油系统中的最重要执行部件之一,其喷射特性的优劣将直接影响发动机的燃烧过程。由于高压共轨喷油器结构复杂,影响喷射性能的结构参数众多,因此为了了解喷油器众多参数对喷射特性的影响趋势以及影响程度,找出其中影响喷射特性的关键结构参数和运行参数、弄清这些关键参数在喷油器设计中的的选取原则,对其进行仿真分析是十分必要的。基于仿真模型对喷油器的关键结构参数进行变参数研究,以分析这些参数对其响应特性、喷油规律等动态性能的影响,探讨各关键参数的设计原则。

High-pressure common rail injector is one of the most important components of the fuel injection system,and its performance will directly affect the engine combustion process.As the high-pressure common rail injector complex structure and the structure parameters which affect the ejecting performance are numerous.In order to understand the trend and impact of effect of the so many parameters,the simulation is necessary to identify the key structure parameters and operating parameters which affect the ejecting performance,and understand how these key parameter in the injector design of the seletion principle.Variable parameters reseach is carried out based on the simulation model of the injector key structural parameters to analyze the influences of dynamic performance,such as response characteristic and fuel injection law,and indicate the priciples of the injector design.