Nixon & Vanderhye, PC
Fuel injection controller
A fuel injection controller used for a fuel injection device that pumps high-pressure fuel to an accumulator and distributes the high-pressure fuel accumulated in the accumulator to injectors mounted in respective cylinders of an internal combustion engine calculates an input quantity and an output quantity of the fuel to and from the accumulator and monitors fuel pressure in the accumulator with a pressure sensor attached to the accumulator. The fuel injection controller has a determination device that determines whether there is a deviation between a sensing value Pcob1 of the pressure sensor and a corresponding value assumed from data Qpf applied to balance computation of the fuel input/output quantities and a storage part that stores the corresponding value Pcf2 based on the data Qpf applied to the balance computation and the sensing value Pcob1 of the pressure sensor and that enables subsequent reading out of the stored values. Thus, it can be determined whether the control is normal control or abnormal control based on the sensing signal of the fuel pressure sensor even if the characteristic deviation of the fuel pressure sensor arises due to incorrect wiring or the like.
DENSO CORPORATION
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Shingo
Watanabe