Delphi Technologies, Inc.

Wenbin Xu

Christopher M Cass

Michael Schneider

David A Webb

Christopher A Tucker

An improved O-ring retainer arrangement for retaining an O-ring on a fuel tube of a fuel injector. An overmolded hard plastic ring is disposed on the cylindrical outer surface of the fuel tube. The end of the fuel tube is radially flared to retain the ring on the tube, the radial extent of the flare being less than or equal to the radial thickness of the ring such that the flare cannot come into contact with the bore of a fuel rail socket. The ring is formed such that axial compressive forces exerted on the ring are outside the fuel tube body and preferably are directly opposed, thus exerting no toroidal torque on the ring. The ring is free to move axially on the fuel tube surface. In one aspect of the invention, the ring can move freely along only a limited region on the fuel tube.

O-ring retainer for a fuel injector in a fuel rail socket

A fuel injection system includes a fuel injector socket including a first attachment feature and a fuel injector including a second attachment feature that corresponds with the first attachment feature. The first attachment feature engages with the second attachment feature connecting the fuel injector to the fuel injector socket and preventing rotational movement of the fuel injector relative to the fuel injector socket. The corresponding attachment features not only enable simple connection and disconnection of a fuel injector to a fuel injector socket of a fuel rail, but can also be integrated into existing injector to fuel rail assembly processes and are applicable in any fuel injection system. The corresponding attachment features may be used with metal fabricated fuel rail assemblies as well as for fuel rail assemblies where the manifold supply tube and the fuel injector sockets are overmolded with a plastic material.

Fuel injector to fuel rail connection

A fuel injector flow director plate assembly having a conventional flow director plate and a director plate retainer disposed in a recess in the fuel injector, the retainer having any of several novel structures for reducing buildup of fuel in the corner between the plate retainer and the recess wall and eliminating dripping of fuel. For example, the retainer may be provided with a long skirt having a small diameter; a shorter skirt; a spherical skirt; a skirt stepped axially; a skirt formed as an axial flange on a separate ring member which is installed outside the retainer itself, the flange protruding through the retainer; a separate ring member installed outside a retainer and having an opening of diameter smaller than the opening in the retainer; and a separate ring member installed inside the retainer and having an opening of diameter smaller than the opening in the retainer.

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Rochester, NY, United States of America

Wenbin Xu