Patent ID: 7698054

Claim:
A start-up control device for an internal combustion engine, comprising: a detector for detecting a fuel temperature and a fuel pressure when start-up of the internal combustion engine is requested; a presumption device for presuming if fuel vapor is generated in fuel piping based on detected fuel temperature and fuel pressure; and a controller for controlling the internal combustion engine so as to preliminarily drive a fuel pump for supplying fuel to a fuel injection valve via the fuel piping before starting up the internal combustion engine by injecting fuel from the fuel injection valve into a combustion chamber of the internal combustion engine, when it is presumed that fuel vapor is generated and the fuel vapor affects startability of the internal combustion engine, wherein the presumption device presumes that fuel vapor is generated when detected fuel temperature and fuel pressure are determined to fall into a predetermined one of a plurality of regions defined by relationship between the fuel temperature and the fuel pressure and saturation fuel vapor pressure characteristics of the fuel.