【摘要】 采用实验与数值模拟相结合的方法,进行了不同控制参数:共轨压力、喷油脉宽条件下高压共轨喷油器的喷射特性研究。通过实验数据总结了电磁式喷油器喷油量、喷油率、针阀开启延迟与关闭延迟、喷油持续期等喷射特性。利用AMESim软件建立的高压共轨燃油系统模型进行仿真计算,与实测喷油器喷油率结果进行了对比验证,分析了共轨系统喷射过程中喷油器内液力过程和针阀运动特性,得到了高压共轨喷油器喷射特性随共轨压力和喷油脉宽的变化机理和规律。更多还原

【Abstract】 By an integrated numerical-experimental approach,the injection characteristics of a production high pressure common rail solenoid injector were investigated on kinds of control parameters include rail pressure and energizing time.The characteristics of injection quality,injection rate,needle opening and closure delays,injection temporal length were summarized via experiment carried out on a test bench.A model of high pressure common rail injection system based on AMESim was used to calculate simulation results,compare and approve the experimental injection data.The injector hydraulic process and lift process of needle were simulated and analyzed.The mechanism and rules of injection characteristics depending on rail pressure and energizing time were summarized.更多还原