Fuel injection control system for internal combustion engine when starting

Claim 1

A fuel injection control system for an internal combustion engine comprising: starting fuel supply means for supplying an amount of fuel to the engine, the amount being determined exclusively for a starting state of the engine; post-starting fuel supply means for supplying another amount of fuel to the engine, said another amount being determined based on an air-fuel ratio control; first determination means for determining whether a rotational speed of the engine exceeds a first predetermined speed, the first predetermined speed corresponding to a rotational speed of the engine at which complete combustion starts in a combustion chamber of the engine; fuel decreasing means for gradually decreasing the amount of fuel to be supplied to the engine by the starting fuel supply means when the first determination means determines that the rotational speed of the engine exceeds the first predetermined speed; second determination means for determining whether the rotational speed of the engine exceeds a second predetermined speed, the second predetermined speed being greater than the first predetermined speed and corresponding to an engine speed at which stable running of the engine occurs after the starting state; and fuel supply switching means for switching from fuel supply by the starting fuel supplying means to fuel supply by the post-starting fuel supply means when the second determination means determines that the rotational speed of the engine exceeds the second predetermined state.