Patent ID: 7591248

Claim:
A fuel injection system, comprising: a fuel tank; an electronically controlled fuel injection apparatus which is located above said fuel tank; a fuel reservoir chamber which is located above said electronically controlled fuel injection apparatus; a fuel introduction passage which connects said fuel tank and said fuel reservoir chamber; a fuel pump which introduces fuel from said fuel tank to said fuel reservoir chamber via said fuel introduction passage; a first fuel return passage which connects said fuel reservoir chamber and said fuel tank, and returns fuel overflowing from said fuel reservoir chamber and vapor to said fuel tank, said first fuel return passage connecting with said fuel reservoir chamber at a first connecting position; a fuel supply passage which connects said fuel reservoir chamber and said electronically controlled fuel injection apparatus; a filter arranged upstream of said electronically controlled fuel injection apparatus in said fuel supply passage for eliminating vapor from fuel passing through said fuel supply passage prior to entry of the fuel into said electronically controlled fuel injection apparatus; and a second fuel return passage connecting said electronically controlled fuel injection apparatus with said fuel reservoir chamber, said second fuel return passage having a portion disposed higher than said first connecting position.