Patent ID: 7263973

Claim:
A fuel supply apparatus for an internal combustion engine having first fuel injection means for injecting fuel into a cylinder and second fuel injection means for injecting fuel into an intake manifold, comprising: temperature monitoring means for monitoring a temperature at a tip end of said first fuel injection means; and control means for increasing a quantity of the fuel circulated through a high-pressure fuel system supplying the fuel to said first fuel injection means when the temperature at the tip end obtained by said temperature monitoring means is higher than a reference temperatures, wherein said high-pressure fuel system includes said first fuel injection means, a delivery pipe to which said first fuel injection means is attached, a low-pressure fuel pump for supplying fuel from a fuel tank, a high-pressure fuel pump for further pressurizing the fuel from said low-pressure fuel pump and supplying the high-pressure fuel to said delivery pipe, a relief path for relieving the fuel from said delivery pipe to said fuel tank, and a relief valve provided at said relief path, and said control means includes means for increasing the quantity of the fuel circulated, by opening said relief valve and by increasing the quantity of the high-pressure fuel supplied from said high-pressure fuel pump.