Patent ID: 8532913

Claim:
A start-up control system for an internal combustion engine comprising: a cranking mechanism that cranks the internal combustion engine at the time of start-up of the internal combustion engine; a setting unit for determining the rotational position of a crankshaft while the internal combustion engine is cranked by said cranking mechanism and for setting a fuel injection start time based on a result of the determination; a counting unit for counting the number of pulses output from a crank position sensor since the start of cranking of the internal combustion engine by said cranking mechanism; an estimation unit for estimating the amount of rotation of the crankshaft in a period since the start of cranking of the internal combustion engine until the crank position sensor outputs an effective pulse signal; and a control unit that enables injection of fuel at the fuel injection start time set by said setting unit on condition that the stopping position of the crankshaft determined by the count counted by said counting unit and the value estimated by the estimation unit is before a predetermined position.