CAJ | 학술논문

为深入研究喷油器入口燃油压力波动的频率特征，建立了共轨液力系统线性模型，基于模型分析了喷油器入口燃油压力波动信号的频率，并对线性模型进行了实验验证。仿真和实验结果均表明喷油器入口燃油压力波动信号中包含多阶频率。由共轨液力系统线性模型仿真计算得到的波动频率与通过实验得到的喷油器入口燃油压力波动频率之差随着轨压的增大而增大，但轨压为130 MPa时的最大差值不超过10％。压力波动信号中包含的各阶频率均随轨压的增大而增大。
위심입연구분유기입구연유압력파동적빈솔특정，건립료공궤액력계통선성모형，기우모형분석료분유기입구연유압력파동신호적빈솔，병대선성모형진행료실험험증。방진화실험결과균표명분유기입구연유압력파동신호중포함다계빈솔。유공궤액력계통선성모형방진계산득도적파동빈솔여통과실험득도적분유기입구연유압력파동빈솔지차수착궤압적증대이증대，단궤압위130 MPa시적최대차치불초과10％。압력파동신호중포함적각계빈솔균수궤압적증대이증대。
In order to investigate the frequency characteristics of fuel pressure fluctuation at inj ector inlet,a linear model of the hydraulic system of high pressure common rail fuel inj ection system was built.Based on this linear model,the frequency charac-teristic of the fuel pressure fluctuation at inj ector inlet was analyzed,and the linear model was verified by experiment.Both simu-lation and experiment results show,that more than one frequency was contained in the fuel pressure fluctuation signal.The differ-ence of fuel pressure fluctuation frequency at inj ector inlet obtained by simulation and experiment increases with the increasing of rail pressure,however,when the rail pressure is 130 MPa,the maximum relative difference is less than 10%.All of the frequen-cies contained in the fuel pressure fluctuation signal increase with the increasing of rail pressure.