The mass flow rate from each injector nozzle hole of a diesel engine influences the distribution, atomization, and combustion of fuel in the chamber. Thus affecting the power, the fuel economy, and the emission quality of the diesel engine. A spray momentum flux test bench was built and used to measure the injection rate from each nozzle hole of a multi-hole nozzle in this study. Selected force sensors used for data acquisition were one of the integral parts of the set-up. The influence of the force sensors’ installed position (location in the set-up) on measured results, were analyzed and the optimum position that ensures independence of the results, determined. Additionally, the effects of injection pressure, injection pulse width and injection hole diameter on the injection characteristics were also investigated. Furthermore, in this research, the reliability and robustness of Strain sensor and Piezoelectric sensors were analyzed with regards to their response. The analysis showed that, strain sensors have weak dynamic response characteristic compared to piezoelectric sensors also, the measured result obtained from strain sensors fluctuated greatly. Piezoelectric force sensor gave a more reliable and stable measurement, comparatively. The accuracy of the results were affected by the installation position of the sensors. A distance of 16 mm (between nozzle hole exit and sensor surface) was determined to be adequate for the acquisition of reliable experimental data. As the injection pressure gets higher (during injection), the rate of mass flow increased, the average cycle-to-cycle variation coefficient and nozzle-to-nozzle variability coefficient of injection quantity decreased. Hence, improving the consistency of each cycle and the uniformity of each hole. In addition, increasing the injection pulse width decreased the average cycle-to-cycle variation coefficient. Also, nozzle-to-nozzle variability coefficient had minimal or no influence with regards to injection pressure. At 80 MPa, the uniformity of injection from the multi-hole nozzle improved significantly. In summary, the larger the hole diameters, the higher the maximum value of mass flow rate and the fuel injection quantity.

来自柴油发动机每个喷油嘴孔的质量流率会影响腔室内燃料的分布，雾化和燃烧。因此，会影响柴油机的功率，燃油经济性和排放质量。在本研究中，建立了一个喷雾动量通量试验台，并用于测量多孔喷嘴每个喷嘴孔的喷射速率。选定的用于数据采集的力传感器是该装置的组成部分之一。分析了力传感器的安装位置（设置中的位置）对测量结果的影响，并确定了确保结果独立性的最佳位置。此外，还研究了注射压力，注射脉冲宽度和注射孔直径对注射特性的影响。此外，在这项研究中 分析了应变传感器和压电传感器的可靠性和鲁棒性。分析表明，应变传感器比压电传感器具有较弱的动态响应特性，应变传感器获得的测量结果波动很大。相比之下，压电式力传感器提供了更可靠，更稳定的测量。结果的准确性受传感器安装位置的影响。确定16毫米的距离（喷嘴孔出口与传感器表面之间的距离）足以获取可靠的实验数据。随着注射压力的升高（注射过程中），质量流率增加，注射量的平均循环间变化系数和喷嘴间变化系数降低。因此，提高每个循环的一致性和每个孔的均匀性。另外，增加注入脉冲宽度减小了平均周期间变化系数。同样，喷嘴之间的可变性系数对喷射压力的影响很小或没有影响。在80 MPa时，多孔喷嘴的注射均匀性显着提高。总之，孔径越大，质量流量和燃料喷射量的最大值越高。多孔喷嘴的注射均匀性显着提高。总之，孔径越大，质量流量和燃料喷射量的最大值越高。多孔喷嘴的注射均匀性显着提高。总之，孔径越大，质量流量和燃料喷射量的最大值越高。