Patent ID: 8155859

Claim:
A fuel injection device comprising: a fuel injection valve for injecting fuel distributed from a pressure-accumulation vessel pressure-accumulating fuel; a pressure sensor located in a fuel passage from the pressure-accumulation vessel to a nozzle hole of the fuel injection valve and closer to the nozzle hole than the pressure-accumulation vessel, the pressure sensor configured to output a detection signal correspondingly to pressure of the fuel; and a storage unit for storing individual difference information, which indicates an output characteristic of the detection signal obtained by an examination, wherein the individual difference information is: information indicating a relationship between change in test pressure and change in detection signal, the test pressure is actually applied to the pressure sensor in the examination, and the change in detection signal is attributed to the change in the test pressure, information indicating a relationship between the change in the test pressure and the change in the detection signal with respect to each of a plurality of changing ranges, the relationship being obtained by changing the test pressure in the plurality of changing ranges different from each other, and information indicating a relationship between the change in the test pressure and the change in the detection signal, the relationship being obtained by alternately changing the test pressure at a changing speed corresponding to a changing speed when the detection signal changes attributed to start or end of fuel injection from the injection nozzle.