Patent ID: 7121261

Claim:
A fuel supply apparatus for an internal combustion engine comprising: first fuel injection means for injecting fuel into a cylinder of said internal combustion engine, second fuel injection means for injecting fuel into an intake manifold of said internal combustion engine, fuel injection ratio control means for controlling a fuel injection ratio of a fuel injection quantity between said first fuel injection means and second fuel injection means with respect to a total fuel injection quantity in said internal combustion engine based on a required condition of said internal combustion engine, a fuel pump boosting pressure of fuel to discharge a quantity corresponding to open/closure control of a metering valve, a fuel delivery pipe receiving and delivering to said first fuel injection means the fuel discharged from said fuel pump, a pressure measurement unit measuring fuel pressure in said fuel delivery pipe, and fuel pressure control means for controlling open/closure of said metering valve according to an insufficient fuel pressure with respect to a target pressure of the measured fuel pressure by said pressure measurement unit, wherein said fuel pressure control means controls open/closure of said metering valve such that fuel of boosted pressure is discharged from said fuel pump when said measured fuel pressure is not more than said target pressure even in an in-cylinder injection suppressing period during which fuel is not injected from said first fuel injection means.