| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection control device of an internal combustion engine which can accurately detect a degree of a variation of a behavior of a drive voltage caused by an influence of an individual difference of a magnetic circuit of a fuel injection valve.SOLUTION: An ECU 30 as a fuel injection control device comprises: an injector control part 31 which opens and drives a fuel injection valve 21 by carrying electricity to a magnetic circuit 56 of the fuel injection valve 21 at a prescribed injection pulse p1, and carries electricity to the magnetic circuit 56 at a prescribed energization pulse P2 at which a needle valve 53 of the fuel injection valve 21 is not driven; and a storage part 33 which stores information on a behavior of a drive voltage (negative terminal voltage Vm) of the fuel injection valve 21 when electricity is carried to the magnetic circuit 56 by the injector control part 31 at the energization pulse P2.SELECTED DRAWING: Figure 4 |
