Delphi Technologies, Inc.

Duane E Potter

Patrick A Furchill

Avoki M Omekanda

Kevin Richard Keegan

Charles Wilson Braun

Charles Joseph Badura

Allan Richard Wells

Michael J Colletti

John R Socha

A fuel rail assembly of an internal combustion engine includes an axially extending non-round fuel conduit and at least one axially extending stiffening feature integral with said conduit. Integration of the stiffening features in the conduit enables reduction or elimination of the objectionable frequency noise radiated by the fuel rail assembly. By aligning the stiffening features axially relative to the conduit, panels having a relatively small surface area are formed and, thus, the noise radiating surface area is significantly reduced. The axial orientation of the added stiffening features allows the length of the stiffening features to be relatively large, which increases the stiffening effects to provide increased resistance to flexing, thus, reducing the noise radiated by the fuel system of the internal combustion engine.

Fuel rail radiated noise reduction

A precision fuel rail assembly for direct fuel injection comprising a plurality of formed parts first assembled and positioned loosely on a precision fixture, then joined (e.g. tack welded), by applying a BFM on all joints forming a 'green' assembly and firing in a brazing oven, to produce a precision assembly formed from stainless steel parts. A bracket defining a sole plate for the assembly may be formed as a continuous element or a plurality of individual fuel rail brackets. Flanged sockets are attached to the bracket at locations corresponding to the fuel injector locations on an engine bank. Bolt holes are provided along the centerline of the sockets and fuel injectors. The bracket supports a fuel distribution tube via saddle elements disposed between the bracket and the tube. A jump tube supplies fuel from the distribution tube to each socket.

Fabricated fuel rail assembly for direct injection of fuel

Several embodiments of noise reduction apparatus for a fuel injector are disclosed and include perforated tubes, side branch filters and expansion chambers strategically located between a respective injector and the fuel rail to target and reduce high frequency noise generated by the mechanical movement of the fuel injector.

Fuel injector noise mufflers

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Webster, NY, United States of America

Duane E Potter