DE9314134U1 - Switching device - Google Patents
Switching deviceInfo
- Publication number
- DE9314134U1 DE9314134U1 DE9314134U DE9314134U DE9314134U1 DE 9314134 U1 DE9314134 U1 DE 9314134U1 DE 9314134 U DE9314134 U DE 9314134U DE 9314134 U DE9314134 U DE 9314134U DE 9314134 U1 DE9314134 U1 DE 9314134U1
- Authority
- DE
- Germany
- Prior art keywords
- switching device
- housing
- metal salt
- heavy metal
- plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical group [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229910001385 heavy metal Inorganic materials 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 230000000414 obstructive effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/445—Selection of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
- H01H33/58—Silencers for suppressing noise of switch operation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Eye Examination Apparatus (AREA)
- Seal Device For Vehicle (AREA)
- Vehicle Body Suspensions (AREA)
Description
S. 26310
13.8.1993 Km/Smp. 26310
13.8.1993 km/s
ROBERT BOSCH GMBH, 7000 STUTTGART 30ROBERT BOSCH GMBH, 7000 STUTTGART 30
Schaltvorrichtung
Stand der Technik Switching device
State of the art
Die Erfindung betrifft eine Schaltvorrichtung, insbesondere einen elektromagnetisch betriebenen Schalter, nach dem Oberbegriff des Hauptanspruchs. Derartige Schalter werden beispielsweise als Magnetventile mit Kunststoffgehäusen in Kraftfahrzeugen eingesetzt. Dabei hat es sich als nachteilig herausgestellt, daß, wenn die Magnetventile an Karrosserieblechen befestigt werden, störende Schaltgeräusche durch die Karrosseriebleche übertragen werden. Übliche Abhilfen, um diese Schaltgeräusche zu mindern, wie in die Aufhängung eingebrachte Weichgummiblöcke oder komplette SchaumstoffUmhüllungen sind einerseits teuer und andererseits in ihrer Wirkung nicht immer effektiv.The invention relates to a switching device, in particular an electromagnetically operated switch, according to the preamble of the main claim. Such switches are used, for example, as solenoid valves with plastic housings in motor vehicles. It has been found to be disadvantageous that when the solenoid valves are attached to body panels, annoying switching noises are transmitted through the body panels. Common remedies for reducing these switching noises, such as soft rubber blocks inserted into the suspension or complete foam casings, are on the one hand expensive and on the other hand not always effective.
Es ist bereits eine schalldämmende Abdeckhaube, insbesondere eine Zylinderkopfhaube für Brennkraftmaschinen, bekannt geworden (DE-PS 37 34 312), die schichtweise aufgebaut ist und die eine innenliegende Schicht aus einem elastischen, mit Bariumsulfat versetzten Gummi aufweist. Die schalldämmende Wirkung wird hierbei durch den schichtweisen Aufbau in Verbindung mit der elastischen Zwischenschicht erreicht.A sound-insulating cover, in particular a cylinder head cover for internal combustion engines, has already become known (DE-PS 37 34 312), which is constructed in layers and has an inner layer made of elastic rubber mixed with barium sulfate. The sound-insulating effect is achieved by the layered construction in conjunction with the elastic intermediate layer.
- 2 - R. 26310- 2 - R.26310
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäßen Schalter mit den Merkmalen des Hauptanspruchs
haben den Vorteil, daß Schaltgeräusche, insbesondere bei störenden Frequenzen im Bereich von 2 bis 3 kHz, durch das Gehäuse selbst
gedämpft werden. Die Schalter können so in einfacher, herkömmlicher
Weise montiert werden ohne zusätzliche, die Montage behindernde
Dämpfungsteile, wie weiche Unterlegscheiben oder dergleichen.The switches according to the invention with the features of the main claim have the advantage that switching noises, especially at disturbing frequencies in the range of 2 to 3 kHz, are absorbed by the housing itself
The switches can be mounted in a simple, conventional manner without additional, obstructive mounting
Damping parts, such as soft washers or the like.
Durch die Unteransprüche sind vorteilhafte Weiterbildungen der
Schalter nach dem Hauptanspruch möglich.The subclaims provide advantageous further developments of the
Switch according to the main claim possible.
BeschreibungDescription
Der elektromagnetisch betriebene Schalter weist ein Kunststoffgehäuse auf, wobei dem Kunststoff ein Schwermetallsalz, insbesondere Bariumsulfat, beigemischt ist. Als Grundwerkstoff können die meisten Thermo- und Duroplaste eingesetzt werden; als vorteilhaft hat sich Polyamid bewährt. Diesem wird das Schwermetallsalz in einer solchen Menge beigemischt, daß der Gehäusewerkstoff eine resultierendeThe electromagnetically operated switch has a plastic housing, in which a heavy metal salt, in particular barium sulfate, is mixed into the plastic. Most thermoplastics and thermosets can be used as the base material; polyamide has proven to be advantageous. The heavy metal salt is mixed into this in such an amount that the housing material has a resulting
3
Dichte zwischen 2 und 3 g/cm aufweist.3
Density between 2 and 3 g/cm.
Das Material läßt sich in dieser Form problemlos im Spritzgießverfahren
verarbeiten; die mechanischen Eigenschaften des Polyamids
bleiben auch mit Beimischung von Bariumsulfat im wesentlichen erhalten. In this form, the material can be easily processed by injection molding; the mechanical properties of the polyamide
remain essentially intact even with the addition of barium sulfate.
Das mit Bariumsulfat gefüllte Polyamid dämpft Körperschall wesentlich
besser als mit Mineral- oder Glasfasern gefülltes Vergleichsmaterial. So kann zum Beispiel bei einer Dichte von 2,5 g/cm eine
Dämpfungswirkung von ca 3 dB bei Frequenzen zwischen 2 und 3 kHz
erreicht werden.The polyamide filled with barium sulfate dampens structure-borne noise much better than comparable materials filled with mineral or glass fibers. For example, with a density of 2.5 g/cm, a damping effect of approx. 3 dB at frequencies between 2 and 3 kHz can be achieved.
can be achieved.
• · · t· · t
·Φ·Φ;
- 3 - R. 26310- 3 - R.26310
In einer vorteilhaften Anwendung werden Magnetventile für die Kraftstoff-Einspritztechnik oder Tauchentluftungsventile, die während des Betriebes permanent Schaltgeräusche abgeben, wie oben be- schrieben ausgeführt.In an advantageous application, solenoid valves for fuel injection technology or immersion vent valves, which constantly emit switching noises during operation, are designed as described above.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9314134U DE9314134U1 (en) | 1993-09-18 | 1993-09-18 | Switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9314134U DE9314134U1 (en) | 1993-09-18 | 1993-09-18 | Switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE9314134U1 true DE9314134U1 (en) | 1995-01-19 |
Family
ID=6898274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE9314134U Expired - Lifetime DE9314134U1 (en) | 1993-09-18 | 1993-09-18 | Switching device |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE9314134U1 (en) |
-
1993
- 1993-09-18 DE DE9314134U patent/DE9314134U1/en not_active Expired - Lifetime
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