CPC F02D 41/402 (2013.01) [F02D 41/008 (2013.01); F02D 2041/389 (2013.01)] | 7 Claims |
1. A fuel injection control device for an internal combustion engine having a plurality of cylinders and a fuel injection valve provided for each cylinder,
the fuel injection control device comprises:
a basic pulse width setting unit that determines a basic pulse width of a drive pulse signal to be output to the fuel injection valves based on an operation state of the internal combustion engine,
a pulse width correcting unit that corrects the basic pulse width by a cylinder-specific correction value that is based on injection variations among the fuel injection valves and sets a cylinder-specific pulse width,
a split number setting unit that sets a split number of split injection, the split number setting unit being configured to determine whether or not the split number is acceptable based on a pulse width per one injection calculated from the cylinder-specific pulse width and the split number and on a minimum pulse width that is a lower limit of a pulse width of the drive pulse signal, to modify the split number based on a result of the acceptance determination, and to modify an acceptance determination reference value which is used in the acceptance determination based on the correction value for each cylinder, and
a split injection controlling unit that executes split injection based on the split number, the basic pulse width, and the correction value for each cylinder.
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