Patent ID: 7822536

Claim:
A startup control device for an internal combustion engine, comprising: a setting means for setting a specific crank angle in a speed transition period from when the internal combustion engine is started to when an engine speed settles down to a certain speed as a reference crank angle and setting a plurality of crank angles arriving successively after said reference crank angle during said speed transition period as judgment use crank angles; a storing means for detecting and storing in advance a reference crank angle advancing time, said reference crank angle advancing time being a crank angle advancing time when a reference fuel is used, said crank angle advancing being a time required for the crank angle to advance from said reference crank angle to each judgment use crank angle; a detecting means for detecting actual crank angle advancing times during the speed transition period; and a control means, which controls an ignition timing or fuel injection amount during said speed transition period, for retarding an ignition timing or reducing a fuel injection amount by an amount corresponding to a difference of the actual crank angle advancing time from the reference crank angle advancing time when the actual crank angle advancing time is shorter than the reference crank angle advancing time and for advancing the ignition timing or increasing the fuel injection amount by an amount corresponding to a difference of the actual crank angle advancing time from the reference crank angle advancing time when the actual crank angle advancing time is longer than the reference crank angle advancing time.