电控单体泵喷射特性关键影响因素研究

通过数值模拟揭示了凸轮型线速度、柱塞直径、高压油管长度、高压油管内径等关键影响因素对喷射特性中的喷油压力、循环喷油量、喷油持续期和供油系数的影响规律.利用AMESim建模,对比实验数据验证了仿真模型的准确性.应用实验设计的方法,考虑交互作用,进行了相关性分析,得出各种因素和喷射特性参数之间的相关系数.结果表明各影响因素的单因子及交互作用因子均与喷射特性存在着相关性,且随着转速的变化而呈复杂的变化规律.

Key Influence Factors Investigation on the Electronic Unit Pump Injection Characteristics

The simulation model electronic unit pump (EUP) was established in AMESim environment. The accuracy of the model was validated by comparing with the experiment results. By simulating, the influence of cam profile velocity, plunger diameter, length of high pressure fuel pipe, inner diameter of high pressure fuel pipe on injection pressure, cycle fuel injection quantity, fuel injection duration and coefficient of fuel feeding was revealed. By using the design of experiments (DOE) method, and taking the interaction into consideration, correlation between various factors and injection characteristic was analyzed. The correlation coefficient was obtained by analysis, the results show that not only the single factor but also the interaction factor of various influence parameters has correlation with the injection characteristic, and the correlation coefficient represents complex law with the speed variation.