Patent ID: 7350510

Claim:
A fuel supply apparatus for an internal combustion engine having a fuel injection mechanism, 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 mechanism; a relief valve that is directly attached to an egress of said delivery pipe and is 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 a control portion for controlling said relief valve; wherein said control portion switches said relief valve to said communicating state at a time of stop of said internal combustion engine, and switches said relief valve to said communicating state and drives a fuel pump before fuel injection by said fuel injection mechanism when a predetermined condition for a state in said delivery pipe is satisfied.