高压共轨系统高压油泵供油特性影响因素分析  

Investigation on Influencing Factors of Fuel Supply Characteristics of High Pressure Supply Pump for Common-Rail Fuel System

作　　者：范立云[1] 连历 马修真[1] 田丙奇[1] 刘鹏[1] 

机构地区：[1]哈尔滨工程大学动力与能源学院,哈尔滨150001

出　　处：《内燃机工程》2016年第4期219-227,共9页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51379041;51279037);哈尔滨工程大学青年骨干教师支持计划项目;中央高校基本科研业务费专项资金项目(HEUCF13);教育部科学技术研究项目(113060A)

摘　　要：在AMESim仿真环境下完成了高压油泵溢流阀、VCV阀、进油阀、出油阀及供油柱塞等组件模型的建立,通过与高压油泵试验台上的试验数据对比,验证了仿真模型的准确性。利用仿真模型研究了全工况平面内溢流阀、VCV阀、进油阀、出油阀和阻尼孔等部件参数对高压油泵供油特性的影响规律。研究结果表明:在零负荷下,循环供油量随凸轮轴转速的升高而减小,此时进油阀预紧力与节流孔直径对循环供油量影响明显;在部分负荷下,循环供油量随凸轮轴转速的升高而减小,此时溢流阀弹簧刚度、VCV阀弹簧刚度和预紧力、进油阀弹簧预紧力和阻尼孔直径对循环供油量影响明显;在全负荷工况下,循环供油量在低转速时随凸轮轴转速的升高而升高,在高转速时随凸轮轴转速的升高无明显变化。A numerical simulation model of high pressure supply pump including relief valve, VCV valve, inlet valve, outlet valve, cam-piston assembly was established on AMESim platform. The accuracy of the simulation model was validated by comparing the simulated and experimental volumetric efficiency curves. The influence of component related parameters on fuel supply characteristics was analyzed under full-load operating conditions. Analysis results show that at no-load, the cyclic fuel supply quantity （CFSQ） decreases with the increase of cam speed. At this load, the inlet valve initial tension and damping hole diameter have an obvious effect on CFSQ; at partial-load, the CFSQ decreases with the increase of cam speed. At this load, the relief valve spring stiffness, VCV valve spring stiffness and initial tension, inlet valve initial tension and damping hole diameter have an obvious effect on CFSQ; at full load, the CFSQ increases with the increase of cam speed at low speed, but has no significant change at high speed.

关 键 词：内燃机 高压共轨 高压油泵 供油特性 供油量 

分 类 号：TK421.4[动力工程及工程热物理—动力机械及工程]