内燃机工程2025，Vol.46Issue(2)：59-71,13.DOI:10.13949/j.cnki.nrjgc.2025.02.008
电控单体泵多泵供油系统压力波动和一致性研究
Study on the Pressure Fluctuation and Consistency in Multi-Pump Fuel Supply System of Electronic Unit Pumps
刘晓鹏 1王伟 1王字满 2王统诚1
作者信息
- 1. 北京天玛智控科技股份有限公司,北京 101300
- 2. 北京理工大学 机械与车辆学院,北京 100081
- 折叠
摘要
Abstract
In order to solve the problem of poor fuel supply consistency due to pressure fluctuations in the low-pressure fuel tube of the electronic unit pump(EUP)fuel supply system for diesel engines,the simulation model of an EUP single-pump and multi-pump fuel supply system was established using AMESim.And the effect of the diameter of the low-pressure fuel inlet and return tubes,throttle orifice structural parameters and damping valve structural parameters on pressure fluctuations of the fuel tube were investigated.The results show that the larger the diameter of the fuel tube is,the more inclusive the fuel pipe is to the internal fuel,and the smaller the pressure fluctuation inside the pipe will be.The optimal diameters of the main and sub-tubes were 12 mm and 8 mm respectively.The resistance of the fuel flow increases while the pressure fluctuation decreases by adding throttle holes.However,too small aperture will lead to insufficient fuel supply while too large aperture will reduce the throttling effect.Therefore,the optimal aperture diameter was set to 2.5 mm.The damping valve plays a role in throttling,on the other hand,it makes the kinetic and potential energy of the fuel convert into the elastic potential energy of the spring,and ultimately the pressure fluctuations in the fuel tube decrease.The optimal aperture diameter and spring stiffness were set to 2.5 mm and 25 N/mm,respectively.Based on the above optimization scheme,the amplitude of pressure fluctuation was reduced from 0.47 MPa to 0.18 MPa,and the fuel supply characteristics and the consistency of the multi-pump fuel supply system were also improved.关键词
电控单体泵/多泵供油系统/压力波动/一致性Key words
electronic unit pump(EUP)/multi-pump fuel supply system/pressure fluctuation/consistency分类
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刘晓鹏,王伟,王字满,王统诚..电控单体泵多泵供油系统压力波动和一致性研究[J].内燃机工程,2025,46(2):59-71,13.
