| 摘要 |
PROBLEM TO BE SOLVED: To realize a detection of deterioration degree other than an injection amount such as an injection shape in a fuel injection valve and to suitably control an engine by reflecting it to a control of an internal combustion engine. SOLUTION: In order to determine a shape-like deterioration in a fuel injection valve, a presumed fuel injection operation amount Qx at a laminated combustion is corrected by a quantitative injection correction amount Qvol determined from a quantitative deterioration degree Dvol in the fuel injection valve and a presumed fuel injection operation amount Qz after correction is determined (S470). A lack degree 'Q-Qz' which the presumed fuel injection operation amount after correction Qz has against an actual fuel injection operation amount Q is determined and a shape-like deterioration degree variation amountΔDshp is determined by dividing it by the actual fuel injection operation amount Q. A shape-like deterioration degree Dshp, i.e., a deterioration degree other than a fuel injection amount from this shape-like deterioration degree variation amountΔDshp (S490). Thus, the shape-like deterioration degree Dshp only indicating a deterioration degree other than the fuel injection amount can be determined and a preferable engine control becomes possible.
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