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本文首创地提出了一种具有双蓄压室和喷油规律控制阀的新型电液控制共轨式单体喷油器和一种大流量、快速响应、螺管式电磁阀,编制了计算机模拟程序,考虑了液体对球阀的作用力以及间隙对喷油过程的影响,进行了多种喷油器方案的分析比较,研究了结构参数对喷油器性能的影响和电磁阀结构参数、驱动电路对电磁阀响应特性的影响,最终完成了设计方案的选择、参数研究和参数优化。在此基础上完成了工程设计,并建立了电控单体喷油器和快速响应电磁阀的动态测量实验台,用微机加装高速数据采集卡和I/O卡实现时喷油循环的自动控制和数据采集,成功地进行了新型电控单体喷油器和快速电磁阀的参数诊断和性能测试。实验结果表明,所开发的新型电控单体喷油器可以实现可变相位、比例的预喷射和快速停喷,有较高的平均有效喷射压力,显示出令人鼓舞的开发前景。
In this paper, a new type of electro-hydraulic control common rail single injector and a large flow, rapid response, solenoid solenoid valve with dual pressure accumulation chamber and injection law control valve are first proposed. A computer simulation Program, taking into account the liquid on the ball valve force and the gap on the injection process, a variety of fuel injector program analysis and comparison of the structural parameters of the injector performance and the solenoid valve structural parameters, the drive circuit On the solenoid valve response characteristics, and ultimately completed the design options, parameter research and parameter optimization. On this basis, the engineering design was completed, and the dynamic measurement experiment bench of the electronic control unit injector and the rapid response solenoid valve was established. The microcomputer was used to install the high speed data acquisition card and I / O card to realize the automatic injection cycle Control and data acquisition, successfully conducted a new type of electronic single fuel injector and rapid solenoid valve parameter diagnosis and performance testing. The experimental results show that the developed new single-stage electronic fuel injector can achieve variable phase, pre-injection and quick-stop spray with high average effective injection pressure, which shows encouraging development prospect.