| 摘要 |
A bush (31) incorporated in a common rail (1) is formed with a smallest diameter orifice (32) having a small inner diameter and an adjacent orifice (33) having an inner diameter larger than that of the smallest diameter orifice on an inner peripheral face of the bush. A press-fitted portion (34), which is press-fitted into an inside-outside communication hole (24), and a non-press-fitted portion (35), which has a smaller outer diameter than the press-fitted portion, are formed on an outer peripheral face of the bush. The smallest diameter orifice and the press-fitted portion are deviated from each other in an axial direction of the bush to prevent an overlap in a radial direction of the bush. Thus, even if the bush is tightly press-fitted into the inside-outside communication hole, decrease of the inner diameter of the smallest diameter orifice can be averted.
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