FUEL INJECTION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE AND METHOD OF CALCULATING ADHESIVE AMOUNT

摘要

PROBLEM TO BE SOLVED: To provide a technology for accurately calculating a fuel adhesive amount adhering on a wall surface in a cylinder by reducing a calculation load and appropriately controlling fuel injection in a fuel injection control device of an internal combustion engine.

SOLUTION: A fuel flying distance per unit time is calculated based on an in-cylinder state and a fuel injecting speed per unit time calculated based on a fuel injection ratio per unit time injected from a fuel injection valve for injecting fuel in the cylinder of the internal combustion engine. The fuel flying distance is compared with an in-cylinder distance from the fuel injection valve to the wall surface in the cylinder to calculate a time ratio corresponding to that of the fuel per unit time exceeding the wall surface in the cylinder using a minute time which is added when the fuel flying distance is longer than the in-cylinder distance. The fuel adhesive amount adhering on the wall surface in the cylinder is calculated by multiplying and integrating a fuel injection amount per unit time and the time ratio corresponding to that of the fuel exceeding the wall surface in the cylinder and the fuel injection in the fuel injection valve is controlled according to the fuel adhesive amount.

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