Valves and valve actuation – Electrically actuated valve – Including solenoid
Patent
1991-11-13
1993-01-12
Rosenthal, Arnold
Valves and valve actuation
Electrically actuated valve
Including solenoid
251368, 29890124, 29890129, 22826315, 2395851, F16K 3106, F02M 5106, B23K 2600
Patent
active
051783622
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention is based on an electromagnetically actuatable valve as defined hereinafter In German Patent Application P 38 25 135.3 U.S. Pat. No. 4,944,486, an electromagnetically actuatable valve has already been proposed in which the metal valve closing body is joined to the metal connecting tube by soldering or welding. Since the valve closing body has high metal hardness, problems arise in joining the valve closing body and connecting tube to one another in a safe, reliable and strain-free manner.
ADVANTAGES OF THE INVENTION
The valve according to the invention has the advantage over the prior art that a safe, reliable and strain-free connection of the metallically soft connecting tube with the valve closing body, which by comparison is of metallically harder material, is attainable in a simple manner. If a crack occurs during the relatively fast setting of the first spot weld embodied on the valve closing body, then the crack is filled with the second spot weld, which is embodied between the first spot weld and the connecting tube, thereby assuring great strength of the connection.
Advantageous further features of and improvements to the valve disclosed in the main claim are possible with the provisions recited herein.
A continuous encompassing weld seam between the connecting tube and the valve closing body has the advantage of a particularly strong, reliable connection of the connecting tube and valve closing body.
If the connecting tube has a longitudinal slit that cuts open the connecting tube longitudinally, then it is especially advantageous if the weld seam is interrupted in the region of the longitudinal slit; otherwise there is the danger that during welding, weld splashes and weld beads will be created in the interior of the connecting tube, which can become detached during the operation of the injection valve. The processing time is reduced as well.
It is also advantageous if the welding between the connecting tube and the valve closing body is embodied of at least two separate, interrupted weld seams. As a result, during welding, there is less introduction of heat into the valve closing body and hence less distortion of the valve closing body caused by the introduction of heat, thus assuring the tightness between the valve closing body and a valve seat cooperating with the valve closing body, because of greater equality of congruence.
If the connecting tube is cut open longitudinally by a longitudinal slit, then in the case of welding joining the armature to the connecting tube it is advantageous if the weld seam is interrupted at least in the region of the longitudinal slit. With this weld as well, it cannot otherwise be precluded that splashes and weld beads that can become detached during injection valve operation will be created in the interior of the connecting tube during welding.
It is especially advantageous if the welding is embodied by means of a laser, so as to keep the flow of heat into the parts to be welded together as low as possible and thus to limit the distortion caused by the effective temperature as much as possible, as well as to assure an exact, safe and reliable weld.
DRAWING
Exemplary embodiments of the invention are shown in simplified form in the drawing and described in further detail in the ensuing description.
FIG. 1 shows an exemplary embodiment of a valve embodied according to the invention;
FIG. 2 shows a valve needle comprising an armature, connecting tube and valve closing body;
FIG. 3 shows a weld seam according to the invention;
FIG. 4 shows a first exemplary embodiment of a weld seam course, in a section taken along the line IV--IV of FIG. 2;
FIG. 5 shows a second exemplary embodiment of a weld seam course in a section taken along the line V--V of FIG. 2; and
FIG. 6 is a section taken along the line VI--VI of FIG. 2.
DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
The electromagnetically actuatable valve shown by way of example in FIG. 1 in the form of an injection valve for fuel injection systems in internal combustion en
REFERENCES:
patent: 2759249 (1956-08-01), Eberle
patent: 4946132 (1990-08-01), Reiter
Babitzka Rudolf
Vogt Dieter
Greigg Edwin E.
Greigg Ronald E.
Robert & Bosch GmbH
Rosenthal Arnold
LandOfFree
Electromagnetically actuatable 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 Electromagnetically actuatable valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetically actuatable valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1215064