柴油机燃料系统必须供给汽缸严格符合负荷的定量燃料。燃 料必须在高压下喷射，以便在燃烧室压缩空气中保证细小的雾化状态。为了避免喷入气优的燃料雾化不良，燃料在喷射开始时必须有足够高的压力，而在喷射终了时必须能骤然截断。 燃料系统应能在发动机所有转速下随外部负荷 Diesel fuel systems must supply cylinders with fuel that meets the exact load requirements. The fuel must be injected under high pressure in order to ensure a fine atomization in the compressed air of the combustion chamber. In order to avoid poor atomization of the injected fuel, the fuel must have a sufficiently high pressure at the beginning of the injection and must be suddenly cut off at the end of the injection. The fuel system should be capable of external load at all engine speeds