Fluid sprinkling – spraying – and diffusing – Including valve means in flow line – Reciprocating
Patent
1994-03-24
1995-06-27
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Including valve means in flow line
Reciprocating
239600, F02M 5106
Patent
active
054273196
ABSTRACT:
A solenoid-operated top-feed fuel injector has a housing which contains a solenoid coil that is selectively energized by electric current to open and close the fuel injector. An inlet connector tube extends into the housing to convey pressurized liquid fuel into an internal fuel passage. Fuel is injected from the nozzle at the bottom. An armature assembly that has a needle valve joined to an armature is disposed within the fuel passage between the inlet connector tube and the outlet, and is spring-biased by a helical spring to seat the tip of the needle valve on a valve seat proximate the nozzle. Slot structure is formed in the armature during its fabrication by a metal injection molding or sintering process. The needle is inserted into the smaller diameter portion and the two are crimped together. Crimping tool access is through the slot structure, which also provides a path for fuel to flow past the armature. In one embodiment fuel can pass axially through the I.D. of the bias spring directly to the slot structure without having to pass radially through the helical free space between convolutions of the helix.
REFERENCES:
patent: 3702683 (1972-11-01), Sturmer
patent: 4331317 (1982-05-01), Hensley
patent: 4509693 (1985-04-01), Nakai
patent: 4610080 (1986-09-01), Kamai et al.
patent: 5207387 (1993-05-01), Bengstrom
Kashnikow Andres
Siemens Automotive L.P.
Weldon Kevin P.
Wells Russel C.
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