Patent ID: 6912999

Claim:
A method of controlling fuel injection in an internal combustion engine in which a plurality of fuel injection valves are disposed in an intake passage on an upstream side of a collector portion of an intake manifold of the internal combustion engine so that fuel is supplied to a plurality of cylinders of the internal combustion engine by fuel injection from the fuel injection valves, comprising: alternately operating the plurality of fuel injection valves so as to supply the fuel when an intake airflow is a low flow rate equal to or less than a predetermined value including setting a second predetermined value of the intake airflow which is smaller than the predetermined value; and simultaneously operating the plurality of fuel injection valves so as to supply the fuel when the intake airflow is a high flow rate more than the predetermined value wherein an amount of the fuel required for one of the cylinders is injected from each of the fuel injection valve at every predetermined rotational interval when the intake airflow is between the predetermined value and the second predetermined value, and an amount of the fuel required for two of the cylinders is injected from each of the fuel injection valves at every rotational interval which is longer than the predetermined rotational interval when the intake airflow is smaller than the second predetermined value.