| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a common rail in which the internal pressure fatigue strength of the peripheral edge of an opening part on the boundary between a main pipe hole and a branch hole is increased by a simple method, and also provide a method of manufacturing the common rail. <P>SOLUTION: In the method of manufacturing a common rail, the common rail 10 in which tube parts 14 for branching are provided to the outer periphery of a main pipe 12 is manufactured. The main pipe hole 12a is formed in the main pipe 12. The branch hole 14a is formed in each of the tube parts 14 for branching. The main pipe hole 12a communicates with the branch hole 14a. One end of the branch holes 14a is opened to the main pipe hole 12a, and forms the opening part 18. This method of manufacturing a common rail includes a load imparting step of applying a load to the peripheral edges of the opening parts 18 due to the combustion of fuel. <P>COPYRIGHT: (C)2012,JPO&INPIT |
