Walbro Corporation

Richard J Mazur

Sharon J Hudson, Jr

George H Bucci

James D Taylor

Dennis J Duden

Robert L Arno

A mounting plate for an attachment with an insertable plug type tubular connector and a process for making the plate. The mounting plate comprises a sheet metal plate having length, width and body thickness T with a tubular nipple member projecting from one side. The nipple member is cold formed plastically from the body of the plate by a stamping process utilizing a progressive die. One of the intermediate die members is shaped such that it produces a tubular preform having a distal end portion with a wall thickness greater than the wall thickness of the opposite end portion adjacent to the plate. A subsequent die member reduces the excess wall thickness and extends the tubular member to an axial length equivalent to at least 3T measured from the distal end of the neck member to the surface on the opposite side of said plate. Subsequently, another die member precisely finishes a feature located in close proximity to the nipple member.

Fuel regulator mounting plate and forming process

An injection molded fuel injection rail for an automotive engine. The fuel rail is designed to supply fuel to a plurality of electromagnetic fuel injectors oriented at acute angles relative to vertical. The socket inlet apertures through which fuel is fed from the rail interior into the respective fuel injector sockets are located in the bottom of the rail. This prevents the ingestion of vapor, which is normally present in the upper portion of the rail, into the injectors. In order to maintain both sides of these socket inlet apertures at substantially the same level the tilted injector sockets are provided with an occlusive lip along the high side of each inlet aperture. Additionally, the tilted socket axes may be offset laterally downward from the longitidinal rail axis. A plug type fitment is used to close the barrel core pin opening at one end of the rail. It is retained in the opening by a zero compressive load retainer which engages a cooperating annular shoulder structure formed on that end of the rail. To insure uniform distribution of the plastic injected into the mold and to prevent relative movement of the core pins by the force of the injected plastic during the molding process, a sprue site is located above each fuel injector socket in offset parallel alignment with the socket axis.

Molded fuel injection rail

An apparatus for atomizing a gasoline-alcohol blend of automotive fuel and supplying a supplemental amount of vaporized fuel to the intake ports of an engine during cold weather start-up. Also a method of making the same. The apparatus comprises a tubular member having a plurality of configured atomizing orifices. It is positioned inside an engine air intake manifold with its orifice facing away from the intake port side of the manifold in an upstream direction. The orifices are formed by a stamping process wherein a die deforms the tube inwardly at each orifice site and ultimately punctures the tube wall producing a 'T' shaped orifice opening with burred irregular edges and contoured sides. Preferably, each of the apertures is located between a pair of intake ports. Fuel is supplied to a head end of the tubular member, such as by means of an electromagnetic fuel injector, and the tail end of the member is closed.

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Sylvania, OH, United States of America

Richard J Mazur