Fuel feeding system for internal combustion engine

A fuel feeding system for an internal combustion engine, comprising:

• a fuel line arranged between a fuel injector, disposed in the internal combustion engine, and a fuel tank and formed as a recirculation circuit extending from said fuel tank to said fuel injector and then returning from said fuel injector to said fuel tank;
• a low-pressure fuel pump arranged in an upstream part of said fuel line;
• a high-pressure fuel pump arranged in said fuel line between said low-pressure fuel pump and said fuel injector;
• high-pressure control means arranged in a fuel line portion on a downstream side of said high-pressure fuel pump to control the pressure of fuel delivered from said high-pressure fuel pump;
• a first bypass line connecting another fuel line portion on an upstream side of said high-pressure control means and said fuel line portion on the downstream side of said high-pressure control means to each other;
• a switching valve arranged in said first bypass line to open or close said first bypass line;
• low-pressure control means for controlling the pressure of fuel in said upstream-side fuel line portion of said first bypass line at a pressure lower than a control pressure set by said high-pressure control means while said switching valve is open;
• and
• control means for performing open/close control of said switching valve so that said switching valve is closed in an ordinary operation state of said internal combustion engine but is opened in a specific operation state of said internal combustion engine, said specific operation state including at least an operation state at a start-up of said internal combustion engine.