| 摘要 |
To provide a common rail capable of injecting fuel stably by restraining pressure variation in an injection pipe and having excellent stability of seal at a portion thereof connected to the injection pipe, in a common rail constituted by providing a branch hole having a pressure receive seat face communicating with a main pipe rail and opened outwardly at a boss portion provided at a peripheral wall portion of the main pipe rail, bringing and engaging a pressing seat face portion constituted by a connection head portion in contact with the pressure receive seat face and fastening to connect the pressing seat face portion thereto in accordance with pressing operation under a neck of the connection head portion by screwing a fastening nut, by providing an orifice pipe having an outer diameter the same as or larger than a hole diameter of the branch hole in the branch hole, the orifice pipe does not influence on seal performance and the common rail is constituted to be capable of injecting fuel stably by restraining pulsation lowly and retarding propagation.
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