基于状态矩阵的高压共轨系统喷油稳定性研究

发布时间：2018-03-01 04:15

本文关键词： 内燃机状态矩阵高压共轨喷油稳定性　出处：《内燃机工程》2016年06期 　论文类型：期刊论文

【摘要】：在AMESim环境下建立了高压共轨喷油系统的数值仿真模型,通过试验对比证明了所建模型能够准确表征系统的喷射特性。基于数值摄动方法,得到了喷油过程中系统的状态矩阵,并对其进行了分析。通过系统状态矩阵的特征值分布,分析了高压共轨系统喷油过程中的稳定性及其影响因素。研究结果表明:系统状态矩阵的秩主要受电磁阀和针阀运动的影响;高压供油泵的脉动供油是影响系统喷油过程中系统稳定性的主导因素;压力波在系统内的传播、反射和叠加是喷油过程中系统处于非稳定状态的主要原因;喷油阶段针阀开启减弱了压力波反射,抑制了系统的振荡特性,增强了系统的稳定性;电磁阀球阀运动导致的强阻尼作用是系统稳定性的主要影响因素。
[Abstract]:The numerical simulation model of high pressure common rail injection system is established in AMESim environment. The experimental results show that the model can accurately represent the injection characteristics of the system. Based on the numerical perturbation method, the state matrix of the system in the injection process is obtained. Through the eigenvalue distribution of the system state matrix, The stability of high pressure common rail system during fuel injection and its influencing factors are analyzed. The results show that the rank of system state matrix is mainly affected by the movement of solenoid valve and needle valve. The pulsating oil supply of high pressure oil supply pump is the main factor that affects the stability of the system during the injection process, and the propagation of pressure wave in the system, reflection and superposition are the main reasons for the unstable state of the system during the injection process. The opening of needle valve in injection stage weakens the reflection of pressure wave, restrains the oscillation characteristic of the system, and enhances the stability of the system, and the strong damping caused by the movement of the solenoid valve ball valve is the main factor affecting the stability of the system.
【作者单位】：哈尔滨工程大学动力与能源工程学院;
【基金】：国家自然科学基金项目(51379041;51279037) 教育部科学技术研究项目(113060A)
【分类号】：TK423

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