为提高某大流量共轨系统集成限流阀和喷油器滤网后的喷射性能，对限流阀和滤网进行结构优化设计。首先，建立了集成限流阀和喷油器滤网的共轨系统AMESim一维液力仿真模型，利用仿真方法探究了限流阀、滤网和高压油管参数变化对喷油特性的影响规律。其次，以限流阀阀芯直径、节流孔径、阀体内腔直径、阀芯间隙、滤网滤孔直径、高压油管内径为设计变量，循环喷油量和平均喷油速率为响应变量，基于三水平二阶试验方法，应用Design-Expert软件形成设计矩阵，构建效应值和设计因素的多元二次回归方程，并对设计变量进行权重和耦合效应分析。最后，基于响应曲面回归模型，采用多目标MOGA优化算法对限流阀和滤网结构进行优化，限流阀阀芯直径为5.567 mm、阀芯节流孔径为0.954 mm、阀体内腔直径为16.112 mm、阀芯间隙为0.130 mm、滤网孔径为0.583 mm、高压油管内径为3.990 mm时，循环喷油量和平均喷油速率同时最优，优化后循环喷油量和平均喷油速率分别提高了5.86%和6.24%。

To improve the injection performance of a certain highflow common rail system integrating flow limiting valve and injector filter, structural optimization was carried out for both components. Firstly, a one-dimensional hydraulic simulation model of the common rail system was established using AMESim. The simulation model was used to explore the influence of changes in the parameters of flow limiting valve, filter and high-pressure fuel pipe on the fuel injection characteristics. Then the valve core diameter, throttle aperture, valve body inner cavity diameter, valve core clearance, filter hole diameter, and high-pressure fuel pipe inner diameter were used as design variables, and the cyclic fuel injection quantity and average fuel injection rate were used as response variables, and a multiple quadratic regression equation of effect values and design factors was constructed and the weights and coupling effects of design variables were analyzed by applying Design-Expert software to form a design matrix based on the three-level and second-order test method. Finally，based on the response surface regression model, the multi-objective MOGA optimization algorithm was used to optimize the structure of the flow limiting valve and injector filter. The results showed that both the cyclic fuel injection volume and average injection rate were simultaneously optimized when the valve core diameter was 5.567 mm, the throttle aperture was 0.954 mm, the valve body inner cavity diameter was 16.112 mm, the valve core clearance was 0.130 mm, the filter hole diameter was 0.583 mm, and the high-pressure fuel pipe inner diameter was 3.990 mm, The cyclic fuel injection quantity and average fuel injection rate after optimization increased by 5.86% and 6.24%, respectively.