Fluid sprinkling – spraying – and diffusing – Including valve means in flow line – Reciprocating
Patent
1998-04-01
2000-03-21
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Including valve means in flow line
Reciprocating
23953311, 23953312, 2395851, 2395903, B05B 130, F02M 5106
Patent
active
060392711
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on a fuel injection valve as generically defined by the preamble to claim 1. A fuel injection valve is already known (German Patent Application DE 42 21 185 A1) in which the valve seat body is produced by complicated work processes, which along with the relatively high material costs also leads to relatively high production costs.
ADVANTAGES OF THE INVENTION
The fuel injection valve according to the invention having the definitive characteristics of claim 1 has the advantage over the prior art that the valve seat body can be produced in a simple, material-saving way, and particularly in large-scale mass production, this leads to a significant cost savings. Designing the valve seat body of sheet metal not only makes for easy machinability and low weight of the valve seat body but also reduces the amount of material required.
By means of the provisions recited in the dependent claims, advantageous refinements of and improvements to the fuel injection valve defined by claim 1 are possible.
It is advantageous to weld an injection port disk, which has at least one injection port used for fuel metering, to the bottom of the cup-shaped valve seat body, downstream of the valve seat.
It is also advantageous to support a guide disk on the annular-edged end face of the valve seat body in order to guide the valve closing body.
With the interposition of a support ring engaging the injection port disk, it is also advantageous to retain the valve seat body in the valve housing by means of a crimp on the valve housing.
DRAWING
Exemplary embodiments of the invention are shown in simplified form in the drawing and explained in further detail in the ensuing description. FIG. 1 shows a first exemplary embodiment of the invention in terms of a fuel injection valve shown schematically and in fragmentary fashion; and FIG. 2 shows a second exemplary embodiment of the invention in a fragmentary view of a fuel injection valve.
DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
In FIG. 1, an example of an otherwise already known fuel injection valve for fuel injection systems of mixture-compressing internal combustion engines with externally supplied ignition is shown in fragmentary form; it is embodied according to the invention as the first exemplary embodiment. The fuel injection valve has a tubular valve housing 1, in which a longitudinal opening 3 is formed, concentric with a longitudinal valve axis 2. A valve needle 5, for instance of rodlike shape, is disposed in the longitudinal opening 3, and its downstream end is embodied as a spherical portion that serves as a valve closing body 7.
The fuel injection valve is actuated in a known manner, for instance electromagnetically. For axially moving the valve needle 5 and thus opening the fuel injection valve counter to the spring force of a restoring spring, not shown, or closing the fuel injection valve, and electromagnetic circuit shown in suggested fashion in the drawing is used, having a magnet coil 10, an armature 11, and a core 12. The armature 11 is connected to the end of the valve needle 5 remote from the valve closing body 7, for instance by means of a welded seam, and is aimed at the core 12.
For guiding the valve needle 5 and thus the valve closing body 7 during the axial motion along the longitudinal valve axis 2, a guide opening 14 of a guide disk 15 that rests on a valve seat body 16 is used. The valve seat body 16 is inserted into the downstream end, remote from the core 12, of the valve housing 1 into the longitudinal opening 3 that extends concentrically with the longitudinal valve axis 2. The valve seat body 16 is cup-shaped and has a bottom 19 of the seat body, which is located crosswise to the longitudinal valve axis 2, and an annular edge 20 of the seat body, extending in the direction of the longitudinal valve axis 2. Embodied in an upper bottom face 21 of the bottom 19 of the seat body, which face is oriented toward the annular edge 20 of the seat body, is a valve seat 24, which is adjoined in the downstream direction by an o
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Ganey Steven J.
Greigg Edwin E.
Greigg Ronald E.
Kashnikow Andres
Robert & Bosch GmbH
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