文章指出,过去经常采用的压力升程法,需要测量喷嘴油腔压力,然而,喷嘴油腔压力的测量是非常困难的,而且,如不考虑压力波传播的迟后,必将产生误差。本文给出的方法将测点处的压力分解成供油压力、反射压力和残余压力,并实测音速和残余压力,然后联立求解各中间参数及计算喷油规律。本文还给出了计算方框图。 The article points out that the pressure-lift method, which used to be used in the past, needs to measure the nozzle pressure. However, it is very difficult to measure the pressure in the nozzle cavity. And the error will be generated without considering the delay of pressure wave propagation. The method presented in this paper breaks down the pressure at the measuring point into the oil supply pressure, the reflection pressure and the residual pressure, and realizes the sonic speed and the residual pressure. Then the intermediate parameters are calculated and the injection law is calculated. This article also gives a calculation block diagram.