Patent ID: 7275521
Filing Date: 2007-10-02
Classification: F02M,F16L

Abstract:
1. A joint structure of a diverging branch pipe in a fuel rail for an internal combustion engine in which the fuel rail for an internal combustion engine manufactured by stainless steel or manufactured by steel performed with respect to rust prevention processing on at least the inner face, and the diverging branch pipe constructed by a double pipe formed by an outer pipe and an inner pipe having excellent rust preventing ability with respect to fuel on its inner circumferential face in comparison with the outer circumferential face of the outer pipe are connected by a nut for fastening through a joint fitting; wherein a connecting seal portion of said diverging branch pipe and the joint fitting has rust preventing ability equal to that of the inner circumferential face of the diverging branch pipe; an entire liquid contact portion including a seal face of the diverging branch pipe with respect to the fuel is covered with said inner pipe; and a pressure receiving portion of the inner pipe including the seal face is constructed so as to be supported by said outer pipe.