EP2907206A1 - Koronazündeinrichtung mit gasdichtem hf-steckverbinder - Google Patents
Koronazündeinrichtung mit gasdichtem hf-steckverbinderInfo
- Publication number
- EP2907206A1 EP2907206A1 EP13779528.2A EP13779528A EP2907206A1 EP 2907206 A1 EP2907206 A1 EP 2907206A1 EP 13779528 A EP13779528 A EP 13779528A EP 2907206 A1 EP2907206 A1 EP 2907206A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- ignition device
- connector
- corona ignition
- inner conductor
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims abstract description 54
- 239000011521 glass Substances 0.000 claims abstract description 26
- 239000012212 insulator Substances 0.000 claims abstract description 10
- 229910018503 SF6 Inorganic materials 0.000 claims description 4
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 4
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 15
- 238000002485 combustion reaction Methods 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000010304 firing Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 229910000952 Be alloy Inorganic materials 0.000 description 1
- 229910001374 Invar Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- PAOKWJHEAWZUNI-UHFFFAOYSA-N [F].[F].[F].[F].[F].[F].[S] Chemical compound [F].[F].[F].[F].[F].[F].[S] PAOKWJHEAWZUNI-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000000156 glass melt Substances 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910000833 kovar Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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
- H01T19/00—Devices providing for corona discharge
- H01T19/02—Corona rings
-
- 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
- H01T13/00—Sparking plugs
- H01T13/02—Details
- H01T13/08—Mounting, fixing or sealing of sparking plugs, e.g. in combustion chamber
-
- 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
- H01T13/00—Sparking plugs
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
-
- 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
- H01T13/00—Sparking plugs
- H01T13/40—Sparking plugs structurally combined with other devices
- H01T13/44—Sparking plugs structurally combined with other devices with transformers, e.g. for high-frequency ignition
-
- 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
- H01T13/00—Sparking plugs
- H01T13/50—Sparking plugs having means for ionisation of gap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P23/00—Other ignition
- F02P23/04—Other physical ignition means, e.g. using laser rays
Definitions
- the invention relates to a Koronazünd adopted with the features specified in the preamble of claim 1, as known from EP 1 662 626 A1.
- Koronazünd styles have at their combustion chamber remote end on a connector with which they can be connected to a high-frequency generator or the electrical system of a vehicle.
- a corona ignition device can be used to ignite a fuel-air mixture in a combustion chamber of an internal combustion engine by means of a corona discharge generated in the combustion chamber.
- the corona ignition device has a center electrode, which is inserted in an insulator and is thus electrically insulated from a housing and the walls lying at ground potential of the combustion chamber.
- the center electrode together with the housing or the ground potential of the walls of the combustion chamber as a counter electrode has a capacity.
- This capacitance forms, together with a coil arranged in the housing, an electrical resonant circuit which is excited with a high-frequency voltage which is generated, for example, by means of a center-tapped transformer or another high-frequency generator. If the resonant circuit is excited resonantly, there is a voltage increase between the center electrode and the walls of the combustion chamber or the housing of the corona ignition device. This causes a corona discharge to form in the combustion chamber, which emanates from a firing tip at the center electrode.
- Corona ignition devices have the advantage of significantly lower burnup of the electrodes or ignition tips compared to conventional spark plugs which ignite fuel-air mixtures by means of arc discharges. Corona ignition devices therefore have the potential of a much longer life than conventional spark plugs.
- the object of the present invention is to show a way how to improve the life of Koronazünd Anlagenen.
- An inventive RF connector makes it possible to seal the housing tube of a corona ignition gas-tight. In this way, the life of Koronazünd coupleden can increase. In fact, the cause of a premature failure of corona ignition directions is often voltage breakdowns inside the corona ignition device.
- By closing the housing tube of the corona ignition device with an RF connector according to the invention it is possible to prevent air moisture from penetrating into the housing. This is important because humidity lowers the threshold for voltage breakdowns and moisture ingress can therefore lead to premature failure of a corona ignition device.
- An inventive connector makes it possible to further reduce the risk of voltage flashovers by an increased gas pressure at 20 ° C, for example, 2 bar or more, preferably 5 bar or more, is provided in the housing. Already with dry air, the dielectric strength can be significantly increased.
- the interior of the housing may be filled with an insulating gas, for example nitrogen, carbon dioxide and / or sulfur hexafluoride.
- the insulating gas used is preferably a gas mixture which, based on the total number of gas particles, contains at least 5% sulfur hexafluoride
- the requirements for a coaxial RF connector of a corona ignition device are high, since the engine operation brings a high thermal load and also a high mechanical load, in particular by vibrations, with it.
- a glass body which seals an annular gap between the inner conductor and the outer conductor, but a gas tightness of 10 "7 mbar l / s and better can be achieved.
- the glass body is a glass seal surrounding the inner conductor.
- a metal body in this case the outer conductor
- the outer conductor has a higher coefficient of thermal expansion than the glass body and inner conductor on the other hand
- the outer conductor contracts more than the glass body, so that the glass body is pressed with a considerable pressure against the inner conductor.
- the inner conductor has a smaller thermal expansion coefficient so the glass body. Then the inner conductor contracts less during cooling than the glass body surrounding it. The force with which the glass body pushes against the inner conductor is then even greater and, accordingly, the seal even better.
- the outer conductor of steel or an iron-nickel can be alloy, preferably having a thermal expansion coefficient of at least 80 ⁇ 10 "7 per Kelvin at 20 ° C, for example in the range of from 80 to 180- 10" 7 per Kelvin at 20 ° C.
- the glass body can then in particular glasses with a thermal expansion coefficient of for example 50 to 100 10 "7 are used per Kelvin.
- Such glasses are commercially available. Suited is, for example, quartz glass.
- the inner conductor may for example be from a Invar alloy. A SITUATE designated alloy for example, under the name Kovar commercially available.
- the outer conductor of the connector is preferably cohesively connected to a housing tube of the corona ignition device, for example by welding.
- FIG. 1 shows an RF connector in a partially sectioned view.
- FIG. 2 shows a corona ignition device with such an HF connector;
- FIG. 3 is a longitudinal section of Figure 2.
- the RF connector shown in Figure 1 consists of a metallic housing 1, which forms the outer conductor of the coaxial connector, a metallic inner conductor 2 and a glass body 3, which seals an annular gap between the inner conductor 2 and the outer conductor 1.
- the glass body 3 can form a pressure glass feedthrough for the inner conductor 2.
- In the illustrated embodiment serves the glass body 3 at the same time as insulating support for the inner conductor 2, so that it is possible to dispense with other components.
- the annular gap between outer conductor 1 and inner conductor 2 is preferably at least 2 mm wide.
- the diameter of the inner conductor is preferably smaller than the width of the annular gap, for example 1 to 1, 5 mm. With these dimensions, a gas-tight pressure glass feedthrough can be realized well and connect with a sufficiently wide annular gap for the electrical insulation of the inner conductor 2 with respect to the outer conductor 1.
- the high-frequency connector can be used anywhere where an RF device is to be connected from the outside with a high-frequency line releasably electrically connected.
- Particularly suitable is the RF connector for a corona ignition device with which a fuel-air mixture is ignited in a combustion chamber of an internal combustion engine by means of a corona discharge.
- the outer conductor 1 of the illustrated RF connector preferably has a portion 1 a, which has a contoured for engagement with a wrench outer surface.
- section 1a may have a hexagonal or double hexagonal profile.
- the functional surface of the contoured portion 1 a can be used for screwing the corona ignition device into the threaded block of a motor.
- the outer conductor may have further functional surfaces, for example for latching with a matching mating connector.
- this has a cylindrical end portion 1 b, which starts from a circumferential shoulder 1 c. With this end portion 1 b, the RF connector can be plugged into a housing tube.
- the circumferential shoulder 1 c is formed by a flange, which then rests on the front end surface of the tube housing.
- the RF connector can then be attached to a housing tube, for example by welding, for example laser welding or magnetic crimping.
- Figures 2 and 3 show a corona ignition device with the RF connector shown in Figure 1.
- the corona ignition device has a housing 4, which is gas-tightly connected to the outer conductor 1 of the RF connector, for example by welding.
- the housing 4 consists of several parts, namely a housing tube 4a, in which a coil 5 is arranged, and a housing head 4b, which surrounds an insulator 6.
- the coil 5 is wound on a bobbin, which can carry at its end a socket, in which the inner conductor 2 is inserted.
- the inner conductor 2 may be connected to the coil 5.
- the housing head 4b has in the illustrated embodiment, an external thread for screwing into an engine block.
- Required is an external thread but not because the Koronazünd noticed can also be attached to the engine block in other ways.
- a center electrode 7 leads through the insulator 6 to one or more firing tips 8.
- This capacitor is connected in series with the coil 5 and forms with this an electrical resonant circuit. By exciting this resonant circuit, a corona discharge emanating from the firing tips 8 can be generated.
- the housing 4 of the corona ignition device is closed gas-tight at its combustion chamber end of the insulator 6 and at its combustion chamber remote end of the RF connector.
- the gas pressure in the interior of the housing relative to the atmospheric pressure is increased, for example to a value of more than two bar. Values from 5 bar to 30 bar are well suited.
- the gas-tight closure of the housing 4 of the corona ignition device allows gas insulation. Gas insulation not only reduces the risk of voltage flashovers but also reduces losses of the resonant circuit in the conductive housing 4 of the corona ignition device.
- the gas insulation inside the Koronazünd worn can be achieved for example by nitrogen, dry air, sulfur hexafluorine and / or carbon dioxide. Particularly suitable are insulating gases such as nitrogen, sulfur hexafluond and carbon dioxide. In particular, gas mixtures containing sulfur hexafluoride, for example 5 percent (based on the total number of gas molecules) or more, allow excellent gas isolation.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012109762.3A DE102012109762B4 (de) | 2012-10-12 | 2012-10-12 | Koronazündeinrichtung mit gasdichtem HF-Steckverbinder |
PCT/EP2013/070790 WO2014056826A1 (de) | 2012-10-12 | 2013-10-07 | Koronazündeinrichtung mit gasdichtem hf-steckverbinder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2907206A1 true EP2907206A1 (de) | 2015-08-19 |
EP2907206B1 EP2907206B1 (de) | 2020-05-27 |
Family
ID=49447520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13779528.2A Active EP2907206B1 (de) | 2012-10-12 | 2013-10-07 | Koronazündeinrichtung mit gasdichtem hf-steckverbinder |
Country Status (9)
Country | Link |
---|---|
US (1) | US9698575B2 (de) |
EP (1) | EP2907206B1 (de) |
JP (1) | JP6254172B2 (de) |
KR (1) | KR102109670B1 (de) |
CN (1) | CN103726972B (de) |
CA (1) | CA2885639C (de) |
DE (1) | DE102012109762B4 (de) |
TW (1) | TWM481985U (de) |
WO (1) | WO2014056826A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014102230B4 (de) | 2013-04-22 | 2019-07-11 | Borgwarner Ludwigsburg Gmbh | Verfahren zum Herstellen einer Koronazündeinrichtung |
JP6677865B2 (ja) * | 2014-08-12 | 2020-04-08 | イマジニアリング株式会社 | 点火装置 |
DE102015113075A1 (de) * | 2015-08-07 | 2017-02-09 | Borgwarner Ludwigsburg Gmbh | Koronazündeinrichtung mit hohlem Spulenkörper |
US10622788B1 (en) * | 2018-12-13 | 2020-04-14 | Tenneco lnc. | Corona ignition assembly including a high voltage connection and method of manufacturing the corona ignition assembly |
DE102019111749A1 (de) * | 2019-05-07 | 2020-11-12 | Te Connectivity Germany Gmbh | Elektrischer Steckverbinder sowie elektrische Steckverbindung |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2575140A (en) * | 1948-12-29 | 1951-11-13 | Bendix Aviat Corp | Ignition device and parts thereof |
FR1377313A (fr) * | 1963-07-05 | 1964-11-06 | Vide Soc Gen Du | Perfectionnements aux passages coaxiaux |
US3936125A (en) * | 1974-01-28 | 1976-02-03 | Bunker Ramo Corporation | Electrical connector with metal to metal seal |
JPS512847A (en) * | 1974-06-25 | 1976-01-10 | Toyota Motor Co Ltd | Nainenkikanno zatsuondenpayokushohaidenki |
US4430376A (en) * | 1982-07-13 | 1984-02-07 | Box Leonard J | Glass-to-metal compression sealed lead-in structure |
JPS61143974A (ja) * | 1984-12-17 | 1986-07-01 | 日本特殊陶業株式会社 | 点火プラグ |
US4678358A (en) * | 1985-07-15 | 1987-07-07 | National Semiconductor Corporation | Glass compression seals using low temperature glass |
US5367125A (en) * | 1989-01-20 | 1994-11-22 | Dassault Electronique | Aluminum based article having an insert with vitreous material hermetically sealed thereto |
JP2699619B2 (ja) * | 1990-06-27 | 1998-01-19 | 日本電気株式会社 | 電歪効果素子 |
US5157831A (en) * | 1991-12-20 | 1992-10-27 | Alfred University | Process for preparing an hermetically sealed glass-metal electrical connector |
US5709724A (en) * | 1994-08-04 | 1998-01-20 | Coors Ceramics Company | Process for fabricating a hermetic glass-to-metal seal |
US6037539A (en) * | 1998-03-20 | 2000-03-14 | Sandia Corporation | Hermetic aluminum radio frequency interconnection and method for making |
US6883507B2 (en) | 2003-01-06 | 2005-04-26 | Etatech, Inc. | System and method for generating and sustaining a corona electric discharge for igniting a combustible gaseous mixture |
FR2878658A1 (fr) | 2004-11-29 | 2006-06-02 | Renault Sas | Nouveau procede de montage d'un ensemble bougie et bobine utilisant une transmission du couple de serrage par le corps de la bobine |
DE102005007589B3 (de) * | 2005-02-18 | 2006-06-14 | Kathrein-Werke Kg | Koaxialsteckverbinder |
US7182077B2 (en) * | 2005-05-24 | 2007-02-27 | Ward Michael A V | High energy density inductive coils for approximately 300 ma spark current and 150 mj spark energy for lean burn engines |
DE102006023392A1 (de) * | 2006-05-17 | 2007-11-22 | Forschungszentrum Karlsruhe Gmbh | Schaltfunkenstrecke mit einer Koronaelektrode |
US8013504B2 (en) * | 2007-11-20 | 2011-09-06 | Ngk Spark Plug Co., Ltd. | Spark plug for internal combustion engine and method for producing the spark plug |
DE102009059649B4 (de) * | 2009-12-19 | 2011-11-24 | Borgwarner Beru Systems Gmbh | HF-Zündeinrichtung |
US8653693B2 (en) * | 2010-01-27 | 2014-02-18 | Alphaport, Inc. | Integrated exciter-igniter |
EP2456027A1 (de) * | 2010-11-23 | 2012-05-23 | Delphi Technologies, Inc. | Einkapselung eines Hochfrequenzresonators für das Zündsystem eines Verbrennungsmotors |
KR101868416B1 (ko) * | 2010-12-14 | 2018-06-18 | 페더럴-모굴 이그니션 컴퍼니 | 개선된 코로나 제어를 가진 코로나 점화 장치 |
WO2012092432A1 (en) * | 2010-12-29 | 2012-07-05 | Federal-Mogul Ignition Company | Corona igniter having improved gap control |
US8839752B2 (en) * | 2011-01-14 | 2014-09-23 | John A. Burrows | Corona igniter with magnetic screening |
-
2012
- 2012-10-12 DE DE102012109762.3A patent/DE102012109762B4/de not_active Expired - Fee Related
-
2013
- 2013-10-07 JP JP2015536079A patent/JP6254172B2/ja not_active Expired - Fee Related
- 2013-10-07 KR KR1020157012455A patent/KR102109670B1/ko active IP Right Grant
- 2013-10-07 CA CA2885639A patent/CA2885639C/en active Active
- 2013-10-07 WO PCT/EP2013/070790 patent/WO2014056826A1/de active Application Filing
- 2013-10-07 EP EP13779528.2A patent/EP2907206B1/de active Active
- 2013-10-11 TW TW102219052U patent/TWM481985U/zh not_active IP Right Cessation
- 2013-10-11 CN CN201310473100.1A patent/CN103726972B/zh not_active Expired - Fee Related
-
2015
- 2015-03-26 US US14/669,979 patent/US9698575B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2014056826A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102012109762A1 (de) | 2014-04-30 |
EP2907206B1 (de) | 2020-05-27 |
JP2015537334A (ja) | 2015-12-24 |
DE102012109762B4 (de) | 2014-06-05 |
KR102109670B1 (ko) | 2020-05-13 |
KR20150061003A (ko) | 2015-06-03 |
TWM481985U (zh) | 2014-07-11 |
WO2014056826A1 (de) | 2014-04-17 |
CA2885639C (en) | 2020-11-03 |
US9698575B2 (en) | 2017-07-04 |
CA2885639A1 (en) | 2014-04-17 |
US20150200522A1 (en) | 2015-07-16 |
CN103726972A (zh) | 2014-04-16 |
CN103726972B (zh) | 2017-06-30 |
JP6254172B2 (ja) | 2017-12-27 |
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