Fuel injection rule measuring device of diesel engine and measuring method thereof

The invention discloses a fuel injection rule measuring device of a diesel engine and a measuring method thereof. The device comprises a pressure vessel, an oil atomizer, an oil pump, a photoelectric encoder, a high pressure connector, a pressure sensor, a charge amplifier, a DSP data acquisition system, a temperature sensor, a safety valve, a feeding disconnecting valve, a pressure meter disconnecting valve, a pressure meter, a volume regulating plunger, a back pressure disconnecting valve, an oil collector and a data processing and display system. The method includes that a measuring rule isobtained by utilizing Soave formula by acquiring the temperature and pressure of the pressure vessel and the angle signal of the oil pump. In the invention, the back pressure disconnecting valve is used for back pressure adjustment, the initial pressure in the pressure vessel is accurately controlled, environment back pressure injected by the oil atomizer is accurately simulated, and the volume adjusting plunger can adju