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    • 8. 发明授权
    • Fuel rail assembly and forming method
    • 燃油轨总成及成型方法
    • US06889660B2
    • 2005-05-10
    • US10664159
    • 2003-09-17
    • Masayoshi UsuiToshikazu Watanabe
    • Masayoshi UsuiToshikazu Watanabe
    • B21C37/29F02M55/00F02M55/02F02M69/46F16L41/08
    • F02M55/02F02M55/004F02M55/025F02M69/462F02M69/465F16L41/082
    • A fuel rail assembly for supplying fuel to a plurality of fuel injectors in an engine is provided. This assembly comprises an elongated conduit having a longitudinal fuel passage therein, a fuel inlet pipe fixed to an end or a side of the conduit, and a plurality of branch pipes. The basal end of each branch pipe is adapted to communicate with the fuel passage. The distal end of each branch pipe is provide with a connecting member for connecting to a tip of a fuel injector. The wall of the conduit is provided with holes for receiving the basal ends of the branch pipes. Around each hole an inner collar and an outer collar are integrally formed with the conduit wall, and each branch pipe is fixed to the collars by brazing or welding. The drilling work is performed by a special drilling tool.
    • 提供了一种用于向发动机中的多个燃料喷射器供应燃料的燃料轨组件。 该组件包括其中具有纵向燃料通道的细长导管,固定到导管的端部或侧面的燃料入口管和多个分支管。 每个分支管的基端适于与燃料通道连通。 每个分支管的远端设置有用于连接到燃料喷射器的尖端的连接构件。 导管的壁上设有孔,用于接收分支管的基端。 在每个孔周围,内圈和外圈与管壁一体形成,并且每个分支管通过钎焊或焊接固定到套环。 钻孔工作由特殊的钻孔工具进行。
    • 10. 发明授权
    • Common rail and method of manufacturing the same
    • US6408826B2
    • 2002-06-25
    • US3354198
    • 1998-03-20
    • USUI KOKUSAI SANGYO KK
    • ASADA KIKUOUSUI MASAYOSHIWATANABE EIJITAKIKAWA KAZUNORIKUSANAGI RYUICHI
    • B21C37/29F02M55/02
    • B21C37/29F02M55/025
    • There is provided a common rail which can effectively restrict a generation of a stress in a lower end inner peripheral edge portion of a branch hole and can improve an internal pressure fatigue strength in a branch pipe connecting portion, so that a secure and stable function can be obtained by having an excellent durability and preventing a fluid leakage due to a generation of the crack generation and a method of manufacturing a common rail in which a pressure application process by the press is only added to a normal manufacturing process, no complex equipment is required, a common rail having a high quality can be manufactured by a low cost without generating problems that an equipment cost is increased by an increase of the process and a productivity is reduced. In the method of the invention, there is provided a method of manufacturing a common rail comprising at least one branch hole provided in an axial peripheral wall portion of a main pipe rail having a communication passage inside an axial core, a pressure receiving seat surface communicating with a branch pipe having a communication passage communicating with the communication passage in a peripheral surface portion of the branch hole and open to an outer portion, thereby bringing a pressing seat surface portion constituted by a connection head portion disposed in an end portion of the branch pipe into contact and engaging therewith, and a joint metal fitting surrounding an outer peripheral portion of the main pipe rail and a nut previously assembled in the branch pipe end which are meshed with each other so as to be pressed under a neck portion of the connection head portion, thereby being fastened and connected, wherein a pressing force is applied to the main pipe rail near the branch hole from an outer portion to a diametrical direction by a press method, thereby generating a compression residual stress at a portion near the open end portion of the communication passage of the main pipe rail in the branch hole.