| 摘要 |
<p>Brazing strength at a connection is made great, and fatigue stress in the vicinity of a connection on a side of a branch connecting body (2) is effectively dispersed by a diameter expansion portion (3) contiguous to an inclined wall (3'), so that in the event of repeated, sudden changes in a supply pressure of a high pressure fluide in the installation and vibrations or relative dimensional changes of mating parts and so on, cracking in the vicinity of the connection on the side of the branch connecting body (2) is effectively prevented to eliminate troubles such as fuel leakage. In a fuel rail, one or more through holes provided in an axially extending peripheral wall portion of a main pipe (1) and communicating to a flow passage in the pipe are stepped in cross section or made in the form of a dish-shaped seat (1'') having an inclined surface. A portion near the end on the branch connecting body (2) side defines the diameter expansion portion (3) leading to an inclined wall toward a tip end of the branch connecting body (2), and a tip end of the diameter expansion portion (3) makes a connecting head portion (2''), which has a cross sectional shape completely matching that of the dish-shaped seat (1''), so that the connecting head portion (2'') is made to engage with the dish-shaped seat (1'') and engaging portions of the former and the latter are subjected to brazing to be connected to each other. <IMAGE></p> |
