Oil injector consistency judgment method

The invention discloses an oil injector consistency judgment method. The oil injector consistency judgment method comprises the following steps of S1, activating a set program and setting a target rail pressure value through the program; S2, controlling a fuel oil metering valve to be turned on through an ECU to enable the internal pressure of a common rail pipe to reach the preset target rail pressure value; S3, controlling the fuel oil metering valve to be turned off through the ECU, and activating one oil injector to enable the oil injector to inject fuel oil at the fixed charging time; S4,recording the actual rail pressure value in the common rail pipe after completion of injection and differencing the actual rail pressure value from the target rail pressure value to obtain an actualdecrease value of the oil injector; S5, comparing the actual decrease value with a standard decrease value of a standard oil injector and judging that the consistency of the oil injector is poor if the actual decrease value ex