Patent ID: 8301361

Claim:
An internal combustion engine control system comprising: a crank angle detection means that outputs a crank angle signal corresponding to a crank angle of an internal combustion engine having a plurality of cylinders; a crank angle range storage means that stores a crank angle range at a time when the internal combustion engine stops, based on the crank angle signal; and a piston position determination means that determines the piston positions of the plurality of cylinders, based on the crank angle signal, wherein the crank angle detection means has a function of outputting respective recognition signals from a plurality of intermediate positions each flanked with the positions corresponding to the respective top dead centers of the pistons of the plurality of cylinders and differentiates the kinds of the respective recognition signals outputted from the adjacent intermediate positions; wherein the piston position determination means determines the stopping position of the piston at a time when the internal combustion engine stops, based on the crank angle range stored in the crank angle range storage means and the crank angle corresponding to the position of the recognition signal outputted by the crank angle detection means; and wherein a cylinder to which a fuel is to be initially supplied when the internal combustion engine restarts is determined, based on the stopping position of the piston determined by the piston position determination means.