Method of producing fuel distribution pipe

摘要

A method of producing a fuel distribution pipe includes providing a forged bar made of metal, forming a main bore in the forged bar so as to extend along an axial direction of the forged bar, forming an injector bore having an injector opening in the forged bar, forming a bolt through hole having a bolt opening in the forged bar, obtaining a base pipe having the main bore, the injector bore and the bolt through hole from the forged bar, and bending the base pipe such that the injector opening of the injector bore and the bolt opening of the bolt through hole are provided along a line parallel to the axis of the main bore. The injector bore directly communicates with the main bore and the bolt through hole does not communicates with the main bore.

主权项

1. A method of producing a fuel distribution pipe to be attached to a cylinder head,
the method comprising: providing a forged bar made of metal; forming a main bore in the forged bar so as to extend along an axial direction of the forged bar, the main bore through which fuel is allowed to flow; forming an injector bore in the forged bar, the injector bore having an injector opening and directly communicating with the main bore, the injector bore being configured to receive an injector therein through the injector opening; forming a bolt through hole in the forged bar, the bolt through hole having a bolt opening and not communicating with the main bore, the bolt through hole through which a bolt is to be passed to fix the pipe to the cylinder head; obtaining a base pipe having the main bore, the injector bore, and the bolt through hole from the forged bar; and bending the base pipe such that the injector opening of the injector bore and the bolt opening of the bolt through hole are provided along a line parallel to an axis of the main bore.