Valves and valve actuation – Electrically actuated valve – Including solenoid
Patent
1998-05-18
2000-05-02
Huson, Gregory L.
Valves and valve actuation
Electrically actuated valve
Including solenoid
251285, 29890121, F02M 5108, F16K 3110
Patent
active
060562633
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is based on a valve and a process for manufacturing a valve A valve and a process for manufacturing a valve have already been disclosed (EP 0 497 931 B1), in which in order to adjust the valve needle stroke, the hollow body is deformed between two welds, which can lead to a damage of the welds and to deformations on the valve seat body.
ADVANTAGES OF THE INVENTION
The valve according to the invention, and the process for manufacturing the valve, have the advantage over the prior art that the stroke of the valve needle can be easily adjusted without the danger of an unwanted exertion of force on the valve seat body.
Advantageous improvements and updates of the valve and of the process are possible by means of the measures taken herein.
It is particularly advantageous to embody the at least one constriction on the seat carrier so it is formed running completely around 360.degree. of the seat carrier circumference so that a uniform deformation of the seat carrier is produced. It is also advantageous to provide the constriction with an arcing contour, which produces a uniform stress progression.
It is likewise advantageous to select the ratio of diameter to wall thickness of the tubular seat carrier so that through the formation of the at least one constriction, the seat carrier is either shortened or lengthened in the axial direction along the valve longitudinal axis.
BRIEF DESCRIPTION OF THE DRAWINGS
Exemplary embodiments of the invention are represented in simplified form in the drawings and will be explained in more detail in the description that follows.
FIG. 1 is a partial representation of a first exemplary embodiment of a valve embodied according to the invention,
FIG. 2 is a partial representation of a seat carrier that corresponds to the first exemplary embodiment according to FIG. 1,
FIG. 3 is a partial representation of a seat carrier that corresponds to a second exemplary embodiment.
DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
By way of an example for a valve, FIG. 1 represents a fuel injection valve for fuel injection systems of mixture compressing internal combustion engines with externally supplied ignition, which valve is embodied according to the invention as a first exemplary embodiment. To constitute a valve housing, the fuel injection valve has a tubular seat carrier 1, in which a longitudinal opening 3 is embodied concentric to a valve longitudinal axis 2. a tubular valve needle 5 is disposed in the longitudinal opening 3 and is connected to a ball-shaped valve closing body 7 on its downstream end 6. The actuation of the fuel injection valve is carried out in a known manner, for example electromagnetically. An electromagnetic circuit with a magnet coil 10, an armature 11, and a core 12 is used for axially moving the valve needle 5 and consequently for opening or closing the fuel injection valve counter to the spring force of a restoring spring 8. The armature 11 is connected to the end of the valve needle 5 remote from the valve closing body 7, e.g. by means of a weld, and is aligned toward the core 12. On its end oriented toward the core 12, the seat carrier 1 is provided with a connecting section 13 with a thinner wall thickness, into which the core 12 partially protrudes and with which the core 12 is connected in a sealed fashion, for example by means of a weld. The connecting section 13 represents a high magnetic resistance for the magnetic field lines so that the magnetic field lines run from the seat carrier 1, which is made of ferromagnetic material, past the connecting section 13, to the armature 11 and from this to the core 12, which is likewise made of ferromagnetic material. The magnetic circuit is closed, for example, by means of a bracket 14 made of ferromagnetic material, which encloses the magnet coil 10 from the outside in the axial direction, extends at least partially in the circumference direction, and is connected to the core 12 and the seat carrier 1.
A guide opening 16 of a valve seat body 18, which is slid into the longitudinal opening
REFERENCES:
patent: 3608171 (1971-09-01), Stradtmann
patent: 5158236 (1992-10-01), Sugiyama et al.
Greigg Edwin E.
Greigg Ronald E.
Huson Gregory L.
Keasel Eric
Robert & Bosch GmbH
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