Fluid sprinkling – spraying – and diffusing – Including valve means in flow line – Reciprocating
Reexamination Certificate
1999-02-24
2001-01-16
Kashnikow, Andres (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Including valve means in flow line
Reciprocating
C239S584000, C239S585100, C251S359000, C029S888100, C029S890122, C029S890130
Reexamination Certificate
active
06173914
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a valve and a method for manufacturing a valve seat for the valve.
BACKGROUND INFORMATION
German Patent Application No. 42 21 185 describes an injection valve for injecting fuel into an intake manifold in which the valve seat element is manufactured using a chip-removing production method. After the chip-removing premachining, the valve seat element must be subjected, in the region of the valve seat, to a subsequent microfinishing operation in order to achieve the accuracy in coaction with a spherically configured valve closure element that is necessary for the sealing function. A separately produced perforated spray disk is sealingly joined, by welding, to the valve seat element at its downstream end face. The action of heat during welding can disadvantageously result in an undesired deformatcion of the perforated spray disk. For this two-part valve seat part, it is necessary to manufacture two components separately from one another, which are only subsequently joined to one another and optionally must also be post-processed together, resulting overall in a relatively high production outlay.
SUMMARY OF THE INVENTION
The valve according to the present invention, has the advantage that the valve seat and orifice disk functions are integrated in simple fashion into one single component; an orifice disk element of this kind can be manufactured in a particularly easy, economical, and material-saving manner by series production in large volumes. The configuration of the orifice disk element with several functional regions as a metal laminate element results not only in easy machinability and low weight due to the reduction in components, but also to a decrease in material consumption. It is also possible to dispense with joins between the valve seat element and orifice disk, for example weld beads, thus achieving an economy of material and time and avoiding sealing problems.
The multilayer construction of the orifice disk element from metal sheets arranged in sandwich fashion allows the opening geometry to be configured in such a way that uniform ultrafine atomization of the medium being sprayed out is attained without additional energy, achieving a particularly high atomization quality and spray shaping adapted to the particular requirements. In particularly advantageous fashion, an S-bend in the flow of the medium, for example a fuel, is achieved.
Advantageously, the orifice disk element possesses functional regions for spraying out the medium and influencing its flow (base region), for opening and closing the valve (seat region), for guiding the axially movable valve closure element (guidance region), and for mounting in the valve (retaining region). A single valve component thus performs a plurality of functions.
The S-bend in the flow attained via the geometrical arrangement of the opening geometry (offset between spray discharge openings and inlet opening) allows the configuration of bizarre spray shapes with a high atomization quality. For one-, two-, and multi-stream sprays, the orifice disk elements make possible spray cross sections in innumerable variants, for example rectangles, triangles, crosses, ellipses. Unusual spray shapes of this kind allow precise, optimal adaptation to predefined geometries, for example to different intake manifold cross sections of internal combustion engines. This results in the advantages of geometrically adapted utilization of the available cross section for homogeneously distributed, emissions-reducing mixture introduction, and avoidance of emissions-promoting wall film deposits on the intake manifold wall. With a valve of this kind, it is consequently possible to reduce the exhaust emissions of the internal combustion engine and also to decrease fuel consumption.
Generally, it is to be regarded as a very significant advantage of the valve according to the present invention that spray pattern variations are easily possible.
It is particularly advantageous to provide flow openings in the guidance region of the orifice disk element, so that unimpeded flow of the medium toward the valve seat is made possible. Advantageously, these flow openings have an orientation such that a medium flowing through them has a swirl imparted to it.
The methods according to the present invention for manufacturing a valve seat for a valve, have the advantage that when they are used, multilayer orifice disk elements can easily and economically be manufactured from metal in very large volumes (line production). Particularly advantageously, a simple and economical positional allocation of individual metal foils or of the sheet metal layers of the later orifice disk elements can be implemented using auxiliary openings, so that production reliability is very high. Preferably the positional allocation of the metal foils is accomplished automatically by optical scanning and image analysis. The material, metal thickness, desired opening geometries, and further parameters can very easily be ideally adapted for the particular application on machines and automated equipment provided for the manufacture of multilayer orifice disk elements.
Advantageously, the rounds that are first present in a band and are later isolated are reshaped so as to form orifice disk elements which have at least one base region with the opening geometry, and a seat region with a valve seat surface. The orifice disk elements comprising several sheet metal layers thus combine the valve seat and orifice disk functions in one component.
It is particularly advantageous to make the metal foils available for further processing in the form of foil strips or foil carpets.
Welding, soldering, or adhesive bonding, in all their various forms of application, ideally serve as joining methods to be used optionally for joining several metal foils within or outside the rounds.
In particularly advantageous fashion, isolation of the rounds is accomplished with a cutting tool of a deep drawing tool, in which reshaping of the rounds into cup-shaped orifice disk elements is also performed.
Advantageously, that metal layer of the seat region of the orifice disk element which faces the valve closure element is hardened.
REFERENCES:
patent: 1629504 (1927-05-01), Iversen
patent: 4070895 (1978-01-01), Yamada et al.
patent: 4826131 (1989-05-01), Mikkor
patent: 4854024 (1989-08-01), Grieb et al.
patent: 5372313 (1994-12-01), Chabon et al.
patent: 42 21 185 (1994-01-01), None
patent: WO 89/05914 (1989-06-01), None
Holz Dieter
Hopf Wilhelm
Kashnikow Andres
Kenyon & Kenyon
Kim Christopher S.
Robert & Bosch GmbH
LandOfFree
Valve and method for producing a valve seat for a valve 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 and method for producing a valve seat for a valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve and method for producing a valve seat for a valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2540413