中文摘要：

高压油泵的容积效率决定了其供油能力,为了研究高压油泵容积效率的影响因素,提高高压共轨系统工作压力,利用AMESim液力仿真软件建立高压油泵的仿真模型.基于仿真模型在全工况范围内研究高压油泵容积效率影响机理,在典型工况下研究参数对容积效率的影响规律,利用相关性分析研究了高压油泵参数在有、无交互作用下与高压油泵容积效率的相关性变化规律.通过与实验数据对比,验证仿真模型的准确性,研究结果表明：控制信号占空比对容积效率的影响存在饱和区,在占空比饱和区内高压油泵的容积效率不受占空比影响;不考虑交互作用下影响容积效率的关键参数主要包括柱塞余隙容积、柱塞直径与升程、凸轮供油角及燃油温度等,考虑参数间交互作用下参数自身交互作用和柱塞参数间交互作用产生的二次因子与容积效率的相关性最显著.因此优化柱塞结构,在保证理论供油量前提下进行柱塞直径、升程及余隙容积之间的解耦,能显著提高高压油泵容积效率.

英文摘要：

The volumetric efficiency of a high-pressure pump determines fuel supply performance. To study the in-fluence parameters of volumetric efficiency for a high-pressure pump and increase the working pressure for highpressure common rail systems, a numerical simulation model of a high-pressure pump was established on the AMESim platform. The accuracy of the simulation model was validated by comparing the simulated and experimen-tal cycle fuel supply quantities. The influence mechanism of the volumetric efficiency was studied through the simu-lation model under overall operating conditions. The influence law of parameters on volumetric efficiency was stud-ied under a typical operating condition. Correlation analysis was used to study the variation law of high-pressure pump parameters with volumetric efficiency under parameter interaction or without such interaction. Conclusions show that the influence of duty ratio on volumetric efficiency exists in a saturated zone in which volumetric efficiency is no longer affected by duty ratio. Parameters such as clearance volume, plunger diameter and lift, cam profile, and fuel temperature have a remarkable influence on volumetric efficiency when no interaction occurs between pa-rameters. The second-order factors under itself interaction of parameter and the interaction of plunger parameters are the most remarkable influence factors when the interaction between parameters is considered. Thus, optimizing plunger parameters and decoupling plunger diameter, plunger lift, and clearance volume with the premise of a theo-retical fuel supply can significantly improve the volumetric efficiency of high-pressure pumps.