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基于喷雾动量法的共轨喷油器喷油稳定性试验研究

赵建辉 徐煜 杨贵春 徐丹 王伟

赵建辉, 徐煜, 杨贵春, 徐丹, 王伟. 基于喷雾动量法的共轨喷油器喷油稳定性试验研究[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20230335
引用本文: 赵建辉, 徐煜, 杨贵春, 徐丹, 王伟. 基于喷雾动量法的共轨喷油器喷油稳定性试验研究[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20230335
ZHAO Jianhui, XU Yu, YANG Guichun, XU Dan, WANG Wei. Experimental Study on Injection Stability of Common Rail Injector Based on Spray Momentum Method[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230335
Citation: ZHAO Jianhui, XU Yu, YANG Guichun, XU Dan, WANG Wei. Experimental Study on Injection Stability of Common Rail Injector Based on Spray Momentum Method[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230335

基于喷雾动量法的共轨喷油器喷油稳定性试验研究

doi: 10.3969/j.issn.0258-2724.20230335
基金项目: 科技部重点研发计划政府间创新合作研究项目(2021YFE0114600)
详细信息
    作者简介:

    赵建辉(1981—),男,教授,研究方向为高压燃料喷射技术,E-mail:zhao163.163@163.com

  • 中图分类号: TK423

Experimental Study on Injection Stability of Common Rail Injector Based on Spray Momentum Method

  • 摘要:

    为研究共轨喷油器各喷孔喷油规律,根据动量法研发了多孔喷油器喷油规律测量装置;在不同的负荷工况下,使用研发的装置测量喷油器各喷孔的喷油量差异性,并与商业单次喷射仪EMI 2的测量结果进行对比;在不同的喷油压力下,针对单一喷孔进行喷孔喷油稳定性研究. 研究结果表明:在低喷油压力下,喷油量波动率随着喷油脉宽的增加而降低,整体上喷油量波动率为10%~20%,此时针阀无法完全打开,针阀-针阀座之间燃油的不稳定流动会造成较大的喷油量波动;在高喷油压力下,针阀更容易达到最大升程,喷孔参数间的不一致性是导致喷孔喷油量波动的关键因素,在0.5~2.0 ms的喷油脉宽范围内,喷油量波动率处于5%之内,远小于相同条件低喷油压力下的喷孔喷油量波动率,针阀无法达到最大升程是导致共轨喷油器喷油不稳定性的主要原因.

     

  • 图 1  动量法测量喷油规律示意

    Figure 1.  Injection pattern measured by momentum method

    图 2  喷孔喷油规律测量装置

    Figure 2.  Measuring device for injection pattern of nozzle hole

    图 3  EMI 2型商业单次喷射仪

    Figure 3.  EMI 2 commercial single injection instrument

    图 4  喷油规律重复性误差分析

    Figure 4.  Repeatability error analysis of injection pattern

    图 5  研发的测量装置和EFS喷射仪测量结果对比

    Figure 5.  Comparison of measurement results between developed measuring device and EFS injector

    图 6  喷油器结构示意

    Figure 6.  Structure of injector

    图 7  各喷孔喷油速率实验结果对比

    Figure 7.  Comparison of experimental results of injection rate of each nozzle hole

    图 8  在低喷油压力下喷油速率随喷油脉宽的变化

    Figure 8.  Variation of injection rate with injection pulse width under low injection pressure

    图 9  低喷油压力下喷油量波动率随喷油脉宽的变化

    Figure 9.  Variation of fluctuation rate of injection with injection pulse width under low injection pressure

    图 10  高喷油压力下喷油速率随喷油脉宽的变化

    Figure 10.  Variation of injection rate with injection pulse width under high injection pressure

    图 11  在高喷油压力下喷油速率随喷油脉宽的变化

    Figure 11.  Variation of injection rate with injection pulse width under high injection pressure

    表  1  力传感器主要性能指标

    Table  1.   Main performance indicators of force sensor

    指标 数值
    量程/N 0~20
    输出精度/% 0.05
    响应频率/kHz 10
    工作温度/℃ −20~80
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出版历程
  • 收稿日期:  2023-07-10
  • 修回日期:  2024-01-04
  • 网络出版日期:  2024-07-18

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