单缸电控单体泵低压油路供油特性  

Characteristics of Fuel Supply Loop for Electronic Unit Pump Fuel System

作　　者：王裕鹏[1] 刘福水[1] 刘兴华[1] 陈宇航[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《农业机械学报》2011年第5期24-29,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国防"973"资助项目(97361357)

摘　　要：进行了单缸电控单体泵试验台实验,分析了电控单体泵电磁阀在动作和不动作时低压油路燃油压力之间的关系,结果表明其不动作时的燃油压力状态可以表征单体泵电磁阀工作时的燃油压力状态;建立并校核了低压油路的AMES im仿真模型,获得了泵端及柱塞腔内燃油压力之间的关系,进而采用泵端压力代替柱塞腔内压力来进行电控单体泵充油过程分析;分析了单体泵泵端燃油压力,计算了充油时间,讨论了不同转速和供油压力下充油时间的影响规律,并通过充油时间表征了低压油路的供油能力;探讨了不同供油压力下低压油路的充油临界转速,确定了适合全工况范围最佳供油压力为0.6 MPa,并分析了柱塞腔充油不足对电控单体泵燃油系统的影响。结果表明计算的充油时间可确定单体泵的临界充油转速,从而确定最佳供油压力来保证燃油喷射系统在高压大流量下的循环供油稳定性。The relationship of fuel pressure in fuel supply loop between the solenoid movement was analyzed at first.The results indicated that the consistency of the fuel pressure showed good.Secondly,the simulation model of fuel supply loop was established and validated by AMESim in which the relationship of the high pressure between electronic unit pump（EUP） and the inner of plunger chamber was obtained.Thirdly,the fuel pressure near to the EUP was analyzed,the time of fuel filling was calculated and the effect of it at different fuel supply pressures and speeds was discussed.Finally,the threshold speed of fuel filling process at different fuel supply pressures was analyzed,and the optimal fuel supply pressure was fixed which adapted to all engine conditions.Simultaneously,the effect of insufficient fuel filling was discussed.

关 键 词：电控单体泵 低压油路 供油特性 

分 类 号：TK421.4[动力工程及工程热物理—动力机械及工程]