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    • Research on Inhibition of Fuel Injection Quantity Deviation and Pressure Fluctuation in Common Rail System
    DOI：10.13949/j.cnki.nrjgc.2023.01.002
    Key Words:high pressure common rail system  filter  pressure fluctuation  multi-injection  fuel injection quality deviation
    Author NameAffiliationE-mail
    MENG Yubo* School of Mechanical Engineering， Henan University of Engineering， Zhengzhou 451191， China myb0201@126.com 
    GAO Ya School of Mechanical Engineering， Henan University of Engineering， Zhengzhou 451191， China  
    HUANG Yuchun School of Mechanical Engineering， Henan University of Engineering， Zhengzhou 451191， China  
    DONG Yunfu School of Mechanical Engineering， Henan University of Engineering， Zhengzhou 451191， China  
    LI Pimao Low Emission Vehicle Research Laboratory， Beijing Institute of Technology， Beijing 100081， China  
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    Abstract:In order to effectively suppress the pressure fluctuation generated at the inlet of the injector， a new damping filter was used to carry out an experimental study on the pressure fluctuation control effect. The filtering effects on high-pressure tubing with longer length and smaller diameter under different vessel volumes， rail pressures and injection strategies were researched. Results indicate that the filter can significantly decrease the amplitude of pressure fluctuation under the single injection condition. Under the multiple injection control strategy， when the volume of filter chamber is 1 720 mm3， the deviation of the main injection quantity is 55.0%~67.9% less than that when the volume of filter chamber is 0 mm3 in the pre-main injection mode. When the volume of filter chamber is 1 720 mm3， the deviation of the post injection quantity is 80.8%~82.5% less than that when the volume of filter chamber is 0 mm3 in main-post injection mode， accordingly. In the pre-main injection mode， when the volume of the filter chamber is 1 720 mm3， the fluctuation amplitude of the main injection quantity is only 0.2 mg， 0.4 mg and 0.3 mg higher than that of the main injection quantity when the volume of the filter chamber is 28 000 mm3. In the main-post injection mode， when the volume of the filter chamber is 1 720 mm3， the fluctuation amplitude of the post injection quantity is only 0.3 mg， 0.4 mg and 0.7 mg higher than that of the post injection quantity when the volume of the filter chamber is 28 000 mm3.
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