Fluid sprinkling – spraying – and diffusing – Fluid pressure responsive discharge modifier* or flow... – Fuel injector or burner
Patent
1999-06-17
2000-10-17
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Fluid pressure responsive discharge modifier* or flow...
Fuel injector or burner
23953313, 23953314, 239900, 2395851, 137901, 251118, B05B 130, F02M 6110
Patent
active
061318264
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention is based on a valve, in particular a fuel injection valve for fuel injection systems in internal combustion engines.
BACKGROUND INFORMATION
German Patent Application No. 42 21 185 describes a fuel injection valve in which the valve seat body is manufactured using a cutting process. The valve seat body must be subjected to a fine machining operation after the preliminary cutting operation in order to achieve the accuracy that is required for the sealing function in interacting with a spherical valve closing body. A perforated disk manufactured separately is sealingly attached to the valve seat body by welding. Welding has the disadvantage that the heat effect may result in undesirable deformation. The conventional two-part combination of the valve seat body and perforated disk entails high labor costs both in manufacturing the valve seat body and the perforated disk and in mounting these parts on a valve seat carrier of the fuel injection valve. The relatively high processing cost and the relatively high material costs together result in a relatively high manufacturing cost.
SUMMARY OF THE INVENTION
The valve according to the present invention has the advantage over the related art that the valve seat body and the perforated disk are integrated on a single connecting piece, and this connecting piece can be manufactured from a flat, deformable workpiece, e.g., a metal sheet part, by deep drawing in a simple and material-saving manner. This results in significant cost savings, in particular, in mass production. The one-piece design of the valve seat body and the perforated disk made from a single metal sheet results not only in easier machinability and lower weight of the valve seat body/perforated disk combination, but also in lower metal consumption. The sealing characteristics are also improved.
Providing a preferably polyhedron-shaped guide section upstream from the valve seat surface so that the valve closing body is axially guided in its opening and closing motion has proven advantageous. Unrestricted flow of the medium through the valve up to the sealing valve seat surface is allowed by the polyhedron-shaped design of the guide section.
It is also advantageous if the flat, deformable workpiece, from which the valve seat surface and the perforated disk are made, is bent downstream from the guide section, so that an attachment section of the flat, deformable workpiece extends in the direction of a circumferential end of the workpiece in the flow direction. This has the advantage that the circumferential end of the workpiece is easily accessible so it can be attached to the valve seat carrier, for example, by applying a weld. The other advantage is that the workpiece can be displaced in the valve seat carrier using a displacement tool that engages it from the injection side to set the opening lift of the valve without the tool being seized in the valve seat carrier. After attaching the workpiece to the valve seat carrier, the position of the valve seat and thus the valve lift, i.e., the maximum flow allowed by the valve, can still be slightly changed using the displacement tool. In this case, the workpiece suffers a slight plastic deformation only in the areas distant from the seat.
It is advantageous if the displacement tool is adapted to the shape of the workpiece so that the displacement tool only grips the attachment section and/or the bending area of the workpiece to avoid deformation of the valve seat surface or the section forming the perforated disk during the displacement to set the valve lift.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows an exemplary embodiment of the present invention using the example of a fuel injection valve shown in a partial sectional view.
FIG. 2 shows a section along line II--II of FIG. 1.
FIG. 3 shows a partial view of another exemplary embodiment of a valve together with a displacement tool to set the valve lift.
FIG. 4 shows a particular view of a further exemplary embodiment of a valve together with a displacem
REFERENCES:
patent: 3224684 (1965-12-01), Roosa
patent: 3958757 (1976-05-01), Happel et al.
patent: 4482129 (1984-11-01), Baker et al.
patent: 4897907 (1990-02-01), Kopiec et al.
patent: 5002231 (1991-03-01), Reiter et al.
patent: 5239751 (1993-08-01), Kanamaru et al.
patent: 5340032 (1994-08-01), Stegmaier et al.
patent: 5718387 (1998-02-01), Awarzamani et al.
Evans Robin O.
Kashnikow Andres
Robert & Bosch GmbH
LandOfFree
Valve with combined valve seat body and perforated injection dis does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Valve with combined valve seat body and perforated injection dis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve with combined valve seat body and perforated injection dis will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-460393