| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection device capable of acquiring a phase difference of a crank angle between pressure feed timing and fuel injection timing without performing positioning in attachment of a fuel pump and an internal combustion engine.SOLUTION: The fuel injection device includes a common rail 12 for storing fuel in a high pressure state, a fuel pump 11 connected to a crankshaft 41 of an engine to be driven and pressure feeding the fuel to the common rail 12, a fuel injection valve 20 for injecting the fuel stored in the common rail 12, a fuel pressure sensor 13 for detecting a fuel pressure of the common rail 12 for each of prescribed periods, gradient calculating means 30 for calculating an ascent gradient of the fuel pressure accompanied by pressure feeding by the fuel pump 11 on the basis of the fuel pressure detected for each of the prescribed periods, timing estimating means 30 for estimating the pressure feed timing by the fuel pump 11 on the basis of the calculated ascent gradient, and storage means 34 for storing a rotation angle difference of the crankshaft 41 between the estimated pressure feed timing and the injection timing by the fuel injection valve 20. |
