| 摘要 |
PROBLEM TO BE SOLVED: To provide a common rail capable of preventing generation of cracking on an edge portion of a branch hole opening portion of a fuel storage hole without performing autofrettage processing to provide an internal surface of a common rail body with compressive residual stress.SOLUTION: In a common rail including a fuel storage hole formed inside of a rail body as a columnar space capable of storing fuel of high pressure, and a plurality of branch holes respectively branched from the fuel storage hole toward the outside of the rail body, branching direction of the branch hole is divided into two directions when observed from the axial direction of the fuel storage hole, and central axes of the branch hole branched in one direction and the branch hole branched in the other direction are positioned at angles not opposed to each other. |
