一、前言当前柴油机的发展更重视了燃料喷射装置的改进。增加柴油机的转速和提高增压度要求显著地改进燃料喷射装置。现代大功率柴油机的设计,通常要在给定的运用经济条件下,满足下列部分或全部要求:(1)更高的喷射率(用每度曲轴转角输出的燃料来表征);(2)提高喷射频率;(3)在更宽广的负荷和转速范围内改进燃料的定量和分配; I. Introduction The current development of diesel engines pays more attention to the improvement of fuel injection devices. Increasing the rotational speed of the diesel engine and increasing the degree of pressurization require a significant improvement of the fuel injection device. Modern high-power diesel engines are often designed to meet some or all of the following requirements for a given economic use: (1) higher injection rates (characterized by fuel output per degree of crank angle); (2) increased Jetting frequency; (3) improving the quantification and distribution of fuel over a wider range of loads and speeds;