US Patent 7562650 Start-up control apparatus for an internal combustion engine

The present invention is directed to a start-up control apparatus for an internal combustion engine that can further improve the start-up characteristics of an internal combustion engine. An ECU is provided that corrects a position at which the crankshaft stops or a position at which the crankshaft is predicted to stop based on a rotation state of the crankshaft immediately before stopping; switches an actuation timing of the fuel injection valve of the stopped intake-stroke cylinder, which is predicted to be in a intake stroke based on a position at which the crankshaft stops, based on the position at which the crankshaft is predicted to stop; during engine start-up, switches an ignition timing that actuates the spark plugs based on the position at which the crankshaft stops; predicts the amount of air that is drawn into a cylinder during a predetermined interval after engine start-up, based on the engine speed, the position at which the crankshaft stops, volume in a intake passage, and the number of times that the intake stroke has been carried out; and calculates the fuel injection amount for the cylinder based on the predicted amount of air.