Stabilized voltage fuel injection system

The invention discloses a stabilized voltage fuel injection system, which mainly comprises a high-pressure oil pump, a pressure accumulator, a fuel injector, a flow sensor, a servomotor, a motor driving module and an electric control unit. An input end of the electric control unit is connected with the flow sensor and is used for processing a signal of the flow sensor and then comparing the processed signal with a flow setting value taken as the reference quantity for feedback control; and if the difference between the processed signal and the flow setting value exceeds the preset control quantity, the electric control unit sends an adjustment control instruction, and the deviation amount of fuel flow of the oil injector is controlled within the preset range by adjusting the rotating speed of the servomotor by the motor driving module. The stabilized voltage fuel injection system has the characteristics of accurate and convenient control of fuel flow, high response speed and the like.