Patent ID: 7590482

Claim:
A fuel injection controller used for a fuel injection device that pumps high-pressure fuel to an accumulator with a fuel supply pump and distributes the high-pressure fuel accumulated in the accumulator to injectors mounted to respective cylinders of an internal combustion engine, wherein the fuel injection controller calculates an input quantity and an output quantity of the fuel to and from the accumulator and monitors the fuel pressure in the accumulator with a pressure sensor attached to the accumulator, characterized by: a determination device that determines whether there is a deviation (ΔPcf) between a sensing value (Pcob 1 ) of the pressure sensor and a corresponding value assumed from data applied to balance computation of the fuel input/output quantities; and a storage part that stores the corresponding value (Pcf) based on the data (Qpf, Qp 2 ) applied to the balance computation and the sensing value (Pcob 1 ) of the pressure sensor and that enables subsequent reading out of the stored values.