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EP0099522A2 - Spark gap with a gas-filled housing - Google Patents

Spark gap with a gas-filled housing Download PDF

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Publication number
EP0099522A2
EP0099522A2 EP83106677A EP83106677A EP0099522A2 EP 0099522 A2 EP0099522 A2 EP 0099522A2 EP 83106677 A EP83106677 A EP 83106677A EP 83106677 A EP83106677 A EP 83106677A EP 0099522 A2 EP0099522 A2 EP 0099522A2
Authority
EP
European Patent Office
Prior art keywords
electrodes
spark gap
gas
housing
gap according
Prior art date
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Granted
Application number
EP83106677A
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German (de)
French (fr)
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EP0099522A3 (en
EP0099522B2 (en
EP0099522B1 (en
Inventor
Gerhard Ing. Grad. Lange
Jürgen Ing. grad. Boy
Peter Gründahl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
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Siemens AG
Siemens Corp
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Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0099522A2 publication Critical patent/EP0099522A2/en
Publication of EP0099522A3 publication Critical patent/EP0099522A3/en
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Publication of EP0099522B1 publication Critical patent/EP0099522B1/en
Publication of EP0099522B2 publication Critical patent/EP0099522B2/en
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/20—Means for starting arc or facilitating ignition of spark gap
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed

Definitions

  • the present invention relates to a spark gap according to the preamble of claim 1.
  • a spark gap is shown in DE-OS 30 42 847, relating to a gas discharge surge arrester.
  • the object on which the present invention is based is to reduce the power loss of a spark gap, it being intended to ensure that the power loss of the spark gap is at most about 50% in a series connection with spark plugs.
  • This task is performed for a spark gap in accordance with the generic term Mhs 1 Lk / July 13, 1982 of claim 1 by the characterizing part of claim 1.
  • the electrodes advantageously consist of low-gas materials, in particular of pure copper, nickel or vacon.
  • a particularly uniform breakdown voltage in the spark gap is achieved in that at least one of the electrodes adjacent to the end faces has a rounded or chamfered edge.
  • a particularly advantageous embodiment which has a breakdown voltage of 18 kV and in the case of a spark plug connected in series, consumes only about 10% of its own power loss compared to 90% in the spark plug, has the features that the electrode spacing is approximately 0.5 mm, that the gas pressure in the Vessel about 15 bar is that the gas in the housing consists of a mixture of about 97% by weight N 2 and 3% by weight H 2 and that a chamfer of 1 mm 45 ° or a radius of 0.7 mm is adjacent to the end faces of each of the two electrodes.
  • the breakdown voltage is further stabilized if the sum of the distances from the electrode edges to the ignition point is greater than the electrode distance. This avoids ignition voltage surge curves, which could be caused by the influences of a tightly coupled housing wall.
  • the invention is illustrated by a figure. It shows an embodiment of a spark gap according to the invention in a partially sectioned view.
  • the sum of the distances between the electrode edge 11 and the ignition point 10 is greater than the electrode distance.
  • the electrodes 2 are chamfered in the area of the end faces 8.
  • the chamfer 9 has a width of approximately 1 mm in the radial direction. It is inclined at 45 ° to the axis of rotation of the electrodes.
  • a reproducible breakdown voltage is achieved in particular at a high gas pressure of, for example, 15 bar and a small electrode spacing of, for example, approximately 0.5 mm.
  • connection pins 6 are provided with a thread.

Landscapes

  • Spark Plugs (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

In einer Funkenstrecke in einem gasgefüllten Gehäuse (1) wird eine hohe Zündspannung mit einer geringen Verlustleistung erreicht, indem ein Gasdruck von zumindest 5 bar im Gehäuse (1) erzeugt wird und indem die Stirnftächen (8) der Elektroden (2) in geringem Abstand voneinander angeordnet sind. Die Erfindung wird vorzugsweise für Vorfunkenstrecken in Otto-Motoren eingesetzt.

Figure imgaf001
In a spark gap in a gas-filled housing (1), a high ignition voltage with a low power loss is achieved by generating a gas pressure of at least 5 bar in the housing (1) and by the end faces (8) of the electrodes (2) at a short distance from one another are arranged. The invention is preferably used for spark gaps in Otto engines.
Figure imgaf001

Description

Die vorliegende Erfindung betrifft eine Funkenstrecke gemäß Oberbegriff des Patentanspruchs 1. Eine derartige Funkenstrecke ist in der DE-OS 30 42 847, betreffend einen Gasentladungs-Überspannungsableiter, dargestellt.The present invention relates to a spark gap according to the preamble of claim 1. Such a spark gap is shown in DE-OS 30 42 847, relating to a gas discharge surge arrester.

Außerdem ist es aus der Zeitschrift "Automobil-Industrie" 3/78, Seiten 37 bis 41, bekannt, daß die Durchbruchsentladung bei der Zündung von Gasgemischen die beste Energie ausnutzung des Zündfunkens einerseits und des brennbaren Gemisches. andererseits ermöglicht. Demgemäß wird angestrebt, die Durchbruchsentladung besonders ausgeprägt zu erhalten.In addition, it is known from the magazine "Automobil-Industrie" 3/78, pages 37 to 41 that the breakthrough discharge in the ignition of gas mixtures makes the best use of the spark on the one hand and the combustible mixture. on the other hand enables. Accordingly, the aim is to keep the breakdown discharge particularly pronounced.

Außerdem ist es bekannt, zur Lösung dieser Aufgabe zu jeder Zündkerze eines Otto-Motors eine Luftfunkenstrecke in Serie zu schalten, um beim überschreiten der Durchbruchspannung an der-Luftfunkenstrecke eine besonders hohe Durchbruchsentladung in der Zündkerze zu erhalten. Eine Luftfunkenstrecke ergibt jedoch wenig reproduzierbare Werte und zeigt erhebliche Abnutzungserscheinungen. Außerdem sind beim Einsatz einer Lurtiun_kenstrecke erhebliche Abstände erforderlich, um eine Durchschlagsspannung von beispielsweise 18kV zu erreichen. Dadurch ergibt sich eine hohe Verlustleistung, die den Einsatz handelsüblicher Zündspulen nicht mehr gestattet.In addition, it is known to solve this problem to connect an air spark gap to each spark plug of an Otto engine in order to obtain a particularly high breakdown discharge in the spark plug when the breakdown voltage at the air spark gap is exceeded. An air spark gap, however, gives values that are not reproducible and shows considerable signs of wear. In addition, considerable distances are required when using a Lurtiun line to achieve a breakdown voltage of, for example, 18 kV. This results in a high power loss, which no longer allows the use of commercially available ignition coils.

Die Aufgabe, die der vorliegenden Erfindung zugrundeliegt, besteht in einer Herabsetzung der Verlustleistung einer Vorfunkenstrecke, wobei gewährleistet sein soll, daß bei einer Reihenschaltung mit Zündkerzen die Verlustleistung der Vorfunkenstrecke höchstens etwa 50% beträgt. Diese Aufgabe wird bei einer Funkenstrecke gemäß Oberbegriff Mhs 1 Lk/13.7.1982 des Patentanspruches 1 durch das Kennzeichen des Patentanspruchs 1 gelöst.The object on which the present invention is based is to reduce the power loss of a spark gap, it being intended to ensure that the power loss of the spark gap is at most about 50% in a series connection with spark plugs. This task is performed for a spark gap in accordance with the generic term Mhs 1 Lk / July 13, 1982 of claim 1 by the characterizing part of claim 1.

Dabei ist als Zündhilfe vorteilhaft ein Zündpunkt eingesetzt. Die'Elektroden bestehen vorteilhaft aus gasarmen Materialien, insbesondere aus reinem Kupfer, Nickel oder Vacon.An ignition point is advantageously used as the ignition aid. The electrodes advantageously consist of low-gas materials, in particular of pure copper, nickel or vacon.

Eine besonders gleichmäßige Durchbruchsspannung in der Funkenstrecke wird erreicht, indem zumindest eine der Elektroden an die Stirnflächen angrenzend eine verrundete oder angefaste Kante aufweist.A particularly uniform breakdown voltage in the spark gap is achieved in that at least one of the electrodes adjacent to the end faces has a rounded or chamfered edge.

Eine besonders vorteilhafte Ausführungsform, welche eine Durchbruchsspannung von 18kV besitzt und im Falle einer in Reihe geschalteten Zündkerze nur etwa 10% Eigenverlustleistung gegenüber 90% in der Zündkerze verbraucht, hat die Merkmale, daß der Elektrodenabstand ca. 0,5mm beträgt, daß der Gasdruck im Gefäß etwa 15 bar beträgt, daß das Gas im Gehäuse aus einem Gemisch aus etwa 97Gew% N2 und 3Gew% H2 besteht und daß eine Fase von 1mm 45° oder ein Radius von 0,7mm an die Stirnflächen jeder der beiden Elektroden angrenzt. Eine weitere Stabilisierung der Durchbruchsspannung wird erreicht, wenn die Summe der Abstände von den Elektrodenkanten zum Zündpunkt größer ist als der Elektrodenabstand. Dadurch werden Zündspannungsschivankurgen vermieden, die durch Einflüsse einer eng angekoppelten Gehäusewand hervorgerufen werden könnten.A particularly advantageous embodiment, which has a breakdown voltage of 18 kV and in the case of a spark plug connected in series, consumes only about 10% of its own power loss compared to 90% in the spark plug, has the features that the electrode spacing is approximately 0.5 mm, that the gas pressure in the Vessel about 15 bar is that the gas in the housing consists of a mixture of about 97% by weight N 2 and 3% by weight H 2 and that a chamfer of 1 mm 45 ° or a radius of 0.7 mm is adjacent to the end faces of each of the two electrodes. The breakdown voltage is further stabilized if the sum of the distances from the electrode edges to the ignition point is greater than the electrode distance. This avoids ignition voltage surge curves, which could be caused by the influences of a tightly coupled housing wall.

Die Erfindung wird an einer Figur erläutert. Sie zeigt ein Ausführungsbeispiel einer erfindungsgemäßen Funkenstrecke in teilweise geschnittener Ansicht.The invention is illustrated by a figure. It shows an embodiment of a spark gap according to the invention in a partially sectioned view.

Ein zylinderförmiges, isolierendes Gehäuse 1, vorzugsweise aus Keramik ist mit Lötflanschen 4 von Elektroden 2 vakuumdicht verlötet. Anschließend an die Lötflansche 4 weisen die Elektroden 2 einen dünnwandigen, kegelstumpfförmigen Teil 5 auf, an den sich ein Teil 7 aus Vollmaterial anschließt. Der Teil 7 endet in der Stirnfläche 8. Er ist vorteilhaft zylinderförmig oder verjüngt sich kegelstumpfförmig zur Stirnfläche 8 hin. Der Lötflansch 4 ist auf die Gehäusestirnflächen 3 vakuumdicht aufgelötet.A cylindrical, insulating housing 1, preferably made of ceramic, is soldered vacuum-tight with soldering flanges 4 of electrodes 2. Subsequent to the solder flanges 4 the electrodes 2 have a thin-walled, frustoconical part 5, to which a part 7 made of solid material is connected. The part 7 ends in the end face 8. It is advantageously cylindrical or tapers in the shape of a truncated cone towards the end face 8. The solder flange 4 is soldered onto the housing end faces 3 in a vacuum-tight manner.

Um Schwankungen an der Zündspannung zu vermeiden, ist die Summe der Abstände zwischen Elektrodenkante 11 und Zündpunkt 10 größer als der Elektrodenabstand.In order to avoid fluctuations in the ignition voltage, the sum of the distances between the electrode edge 11 and the ignition point 10 is greater than the electrode distance.

Die Elektroden 2 sind im Bereich der Stirnflächen 8 angefast. Die Fase 9 weist in radialer Richtung eine Breite von etwa 1mm auf. Sie ist unter 45° gegen die Rotationsachse der Elektroden geneigt. Dadurch wird insbesondere bei einem hohen Gasdruck von beispielsweise 15 bar und geringem Elektrodenabstand von beispielsweise ca. 0,5mm eine reproduzierbare Durchbruchspannung erreicht. Durch diese Ausführungsform können die Eigenverluste der Vorfunkenstrecke bei Serienschaltung zu einer Zündkerze eines Otto-Motors auf etwa 10% begrenzt werden. Anschlußzapfen 6 sind mit einem Gewinde versehen.The electrodes 2 are chamfered in the area of the end faces 8. The chamfer 9 has a width of approximately 1 mm in the radial direction. It is inclined at 45 ° to the axis of rotation of the electrodes. As a result, a reproducible breakdown voltage is achieved in particular at a high gas pressure of, for example, 15 bar and a small electrode spacing of, for example, approximately 0.5 mm. With this embodiment, the inherent losses of the spark gap when connected in series to a spark plug of an Otto engine can be limited to approximately 10%. Connection pins 6 are provided with a thread.

Claims (6)

1. Funkenstrecke mit einem gasgefüllten Gehäuse, welche zwei einander gegenüberstehende und koaxial zueinander angeordnete Elektroden aufweist, wobei die Elektroden aus einem kegelstumpfförmigen Teil geringer Wandstärke, aus einem an die Stirnfläche eines zur Gehäusewand gehörenden zylinderförmigen Isolierkörpers vakuumdicht befestigten Flansch und einem Teil aus Vollmaterial zusammengesetzt sind und welche im Bereich des Spaltes zwischen den Elektroden eine Zündhilfe aufweist, dadurch gekennzeichnet, daß die Stirnflächen (8) der Elektroden (2) in geringem Abstand voneinander angeordnet sind, daß zumindest eine der Elektroden (2) an die Stirnflächen (8) angrenzend eine verrundete oder angefaste Kante aufweist, daß das Gehäuse mit einem inerten Gas gefüllt ist und daß das Gas im Gehäuse unter einem Druck von zumindest 2 bar steht.1. Spark gap with a gas-filled housing, which has two electrodes that are opposite one another and arranged coaxially to one another, the electrodes being composed of a truncated-cone-shaped part with a small wall thickness, a vacuum-tight flange attached to the end face of a cylindrical insulating body belonging to the housing wall, and a part made of solid material and which has a starting aid in the area of the gap between the electrodes, characterized in that the end faces (8) of the electrodes (2) are arranged at a short distance from one another, that at least one of the electrodes (2) adjoins the end faces (8) has rounded or chamfered edges that the housing is filled with an inert gas and that the gas in the housing is under a pressure of at least 2 bar. 2. Funkenstrecke nach Anspruch 1, dadurch gekennzeichnet, daß die Zündhilfe ein Zündpunkt ist.2. Spark gap according to claim 1, characterized in that the ignition aid is an ignition point. 3. Funkenstrecke nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet , daß die Elektroden aus gasarmen Materialien bestehen.3. Spark gap according to one of claims 1 or 2, characterized in that the electrodes consist of low-gas materials. 4. Funkenstrecke nach Anspruch 3, dadurch gekennzeichnet, daß die Elektroden aus einem der Metalle Kupfer, Nickel oder Vacon bestehen.4. spark gap according to claim 3, characterized in that the electrodes consist of one of the metals copper, nickel or vacon. 5. Funkenstrecke nach Anspruch 5, dadurch gekennzeichnet, daß der Elektrodenabstand ca. 0,5mm und der Gasdruck im Gehäuse etwa 15 bar betragen, daß das Gas im Gehäuse aus einem Gemisch aus etwa 97Gew% Stickstoff und 3Gew% Wasserstoff besteht und daß eine Fase von 1mm 45° oder einem Radius von 0,7mm an die Stirnflächen jeder der beiden Elektroden angrenzt.5. Spark gap according to claim 5, characterized in that the electrode spacing is approximately 0.5 mm and the gas pressure in the housing is approximately 15 bar, that the gas in the housing consists of a mixture of approximately 97% by weight nitrogen and 3% by weight hydrogen and that a chamfer of 1mm 45 ° or a radius of 0.7mm to the End faces of each of the two electrodes are adjacent. 6. Funkenstrecke nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Summe der Abstände von den Elektrodenkanten (11) zum Zündpunkt (10) größer ist als der Elektrodenabstand.6. spark gap according to one of claims 1 to 5, characterized in that the sum of the distances from the electrode edges (11) to the ignition point (10) is greater than the electrode distance.
EP83106677A 1982-07-23 1983-07-07 Spark gap with a gas-filled housing Expired - Lifetime EP0099522B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3227668 1982-07-23
DE19823227668 DE3227668A1 (en) 1982-07-23 1982-07-23 SPARK RANGE WITH A GAS FILLED HOUSING

Publications (4)

Publication Number Publication Date
EP0099522A2 true EP0099522A2 (en) 1984-02-01
EP0099522A3 EP0099522A3 (en) 1984-07-04
EP0099522B1 EP0099522B1 (en) 1987-02-11
EP0099522B2 EP0099522B2 (en) 1990-03-14

Family

ID=6169212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106677A Expired - Lifetime EP0099522B2 (en) 1982-07-23 1983-07-07 Spark gap with a gas-filled housing

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EP (1) EP0099522B2 (en)
JP (1) JPS5933779A (en)
DE (2) DE3227668A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004017A1 (en) * 1985-12-18 1987-07-02 Cerberus Ag Spark gap, in particular for use as a pre-spark gap of a spark plug of an internal combustion engine
EP0407975A3 (en) * 1989-07-14 1992-05-27 Yazaki Corporation Gas-filled discharge tube and high tension cable device
US5142194A (en) * 1989-01-18 1992-08-25 Siemens Aktiengesellschaft Spark gap component of particular spacing mounted within a shield

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3723571C2 (en) * 1987-07-16 1995-05-04 Siemens Ag High voltage spark gap
DE102005036265A1 (en) 2005-08-02 2007-02-08 Epcos Ag radio link
JP5316020B2 (en) 2009-01-24 2013-10-16 三菱マテリアル株式会社 surge absorber

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1057186A (en) * 1912-04-10 1913-03-25 Louis C Gerwig Spark-intensifier for spark-plugs.
FR1394234A (en) * 1964-02-20 1965-04-02 Thomson Houston Comp Francaise Controlled spark gap
US3388274A (en) * 1966-04-05 1968-06-11 Joslyn Mfg & Supply Co Axial spark gap with a coaxial third electrode adjacent the main axial electrodes
US3956657A (en) * 1972-07-18 1976-05-11 Robert Bosch G.M.B.H. Pre-ignition gap
DE2418261B2 (en) * 1974-04-16 1976-05-13 Siemens AG, 1000 Berlin und 8000 München SPARK GAP COMPONENT FOR IGNITION SYSTEMS IN COMBUSTION MACHINES
US4037266A (en) * 1975-12-29 1977-07-19 Bell Telephone Laboratories, Incorporated Voltage surge protector
DE3042847A1 (en) * 1980-11-13 1982-06-09 Siemens AG, 1000 Berlin und 8000 München GAS DISCHARGE SURGE PROTECTOR WITH CONCENTRICALLY ENCLOSING VERSION

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004017A1 (en) * 1985-12-18 1987-07-02 Cerberus Ag Spark gap, in particular for use as a pre-spark gap of a spark plug of an internal combustion engine
EP0229303A1 (en) * 1985-12-18 1987-07-22 Cerberus Ag Spark gap, particularly for use as booster gap for a sparking plug of an internal combustion engine
US5142194A (en) * 1989-01-18 1992-08-25 Siemens Aktiengesellschaft Spark gap component of particular spacing mounted within a shield
EP0407975A3 (en) * 1989-07-14 1992-05-27 Yazaki Corporation Gas-filled discharge tube and high tension cable device
US5166574A (en) * 1989-07-14 1992-11-24 Yazaki Corporation High-tension cable device

Also Published As

Publication number Publication date
JPS5933779A (en) 1984-02-23
EP0099522A3 (en) 1984-07-04
EP0099522B2 (en) 1990-03-14
DE3369813D1 (en) 1987-03-19
EP0099522B1 (en) 1987-02-11
DE3227668A1 (en) 1984-01-26

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