早在二十世纪三十年代,Г.ГКалищ及其后的A.Пищпингер和И.В.Aстахов等人已经发现,在喷射过程结束时燃油装置高压油路中油流的连续性可能中断。在连续性中断区内所形成的小汽泡对主喷射过程没有明显的影响。但是如果连续性中断保持到下一个喷射循环开始,那么高压油路中(残余自由容积)的气相越多,对喷射过程的影响就越大。 As early as the 1930s, Г.ГК алищ and later A. Пищпингер and И.В. Aстахов, et al., Have found that the continuity of the oil flow in the high-pressure oil circuit of the fuel plant may be interrupted at the end of the injection process. The formation of small bubbles in the discontinuous area has no significant effect on the main injection process. However, if the continuity interrupt is held until the start of the next injection cycle, the more the gaseous phase in the high-pressure circuit (residual free volume), the greater the effect on the injection process.