Patent ID: 6978763
Filing Date: 2005-12-27
Classification: F02D,Y02T

Abstract:
1. A fuel injection device for an internal combustion engine having a combustion chamber and an intake passage connected to the combustion chamber, the device comprising: a direct injector for injecting fuel directly into the combustion chamber; an intake passage injector for injecting fuel into the intake passage; a fuel pressurization system for supplying pressurized fuel to the direct injector, the fuel pressurization system executing a fuel pressure lowering procedure for lowering the pressure of the fuel supplied to the direct injector when the engine load is relatively low; and a setting section for setting a fuel injection ratio based on the operation state of the engine, the fuel injection ratio being the ratio between the fuel injection amount of the direct injector and that of the intake passage injector, wherein, until the pressure of the fuel supplied from the fuel pressurization system to the direct injector is raised from the value lowered through the fuel pressure lowering procedure to a predetermined permissible value, the setting section changes the fuel injection ratio such that the ratio of the fuel injection amount of the direct injector to the total amount of the fuel fed to the combustion chamber is decreased.