Fuel supply apparatus for internal combustion engine

A fuel supply apparatus for an internal combustion engine having fuel injection means, comprising:

• a high-pressure fuel pump driven by said internal combustion engine and for pressurizing fuel supplied from a fuel tank by a low-pressure fuel pump;
• a delivery pipe for supplying the fuel from said high-pressure fuel pump to said fuel injection means;
• a relief valve switched between a communicating state where said delivery pipe is communicated with said fuel tank and a non-communicating state where said delivery pipe is not communicated with said fuel tank;
• and
• control means for controlling said relief valve;
• wherein said control means includes
• means for switching said relief valve to said communicating state at the time of stop of said internal combustion engine, and
• pump control means for switching said relief valve to said communicating state and driving a fuel pump before fuel injection by said fuel injection means when a predetermined condition for a state in said delivery pipe is satisfied.