| 周庆哲，张玉银，齐文元.影响Zeuch法喷油速率测量精度的关键因素研究[J].内燃机工程,2019,40(1):28-35. |
| 影响Zeuch法喷油速率测量精度的关键因素研究 |
| Investigation on the Key Factors Affecting the Accuracy of Fuel Injection Rate Measurement by Zeuch Method |
| DOI：10.13949/j.cnki.nrjgc.2019.01.005 |
| 关键词:喷油速率 汽油机 Zeuch法 含气量 容器刚度 |
| Key Words:injection rate gasoline engine Zeuch's method air content container stiffness |
| 基金项目:国家重点研发计划“政府间国际科技创新合作”重点专项（2016YFE0127500） |
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| 摘要:为提高汽油直喷喷油器喷油速率的测量精度，基于Zeuch法原理开发了喷油速率测量系统。研究发现容器测量腔内容器刚度和含气量都会对Zeuch喷油速率测量精度产生重要影响，同时通过试验与仿真计算对这两个关键因素进行定量的系统的研究。结果表明：低刚度容器在相同喷油条件下体积膨胀相对高刚度容器更大，由此测得的喷油速率曲线相对偏低，测量精度降低；当含气量较大时，腔内压力变化曲线中的压力增量呈线性减小，波动振幅增大，同时波动频率减小，这会导致喷油速率与实际值相比偏低且波动较大。基于研究结果，提出相关修正方法来提高喷油速率测量精度。经优化后的喷油速率测量系统的测量精度大大提高，具有较高的重复性。 |
| Abstract:In order to improve the measurement accuracy of the injection rate of gasoline direct injection injectors, an injection rate measurement system was developed based on the principle of Zeuch method ;and a bench test and simulation calculation were performed on the stiffness of constant volume container, and air content in the measuring chamber that mainly affect the measurement accuracy. Results show that under the same injection conditions, the volumetric expansion of a low stiffness container is greater than that of a high stiffness container, so that the measured injection rate curve is relatively low, resulting in a decrease in measurement accuracy. When the air content in the measuring chamber is large, the increment of the pressure in the chamber decreases linearly, so that the amplitude of the pressure fluctuation increases and the freguency of the fluctuation decreases, resulting in a lower injection rate than the actual value coupled to the increase in fluctuation. Based on the research results, the revised and optimized fuel injection rate measurement system greatly improves the measurement accuracy and has high repeatability. |
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