Patent ID: 7007662

Claim:
A fuel supply apparatus for an internal combustion engine, wherein the internal combustion engine includes a combustion chamber, an air intake passage connected to the combustion chamber, an in-cylinder injector for directly injecting fuel into the combustion chamber, an air-intake passage injector for injecting fuel into the air intake passage, a low-pressure pump for pumping fuel from a fuel tank and discharging low-pressure fuel, a low-pressure pipe for supplying the low-pressure fuel to the air-intake passage injector, a high-pressure pump for pressurizing the low-pressure fuel and discharging high-pressure fuel, and a high-pressure pipe for supplying the high-pressure fuel to the in-cylinder injector, the fuel supply apparatus comprising: a controller for controlling the high-pressure pump, wherein if the pressure of the fuel in the high-pressure pipe is lower than a target pressure by a predetermined value when the fuel is being injected only from the air-intake passage injector, the controller determines a discharge amount for the high-pressure pump that is necessary to raise the pressure of fuel in the high-pressure pipe to the target pressure, and the controller controls the high-pressure pump in accordance with the determined necessary discharge amount.