EP2062338A1 - Zundkerze - Google Patents
ZundkerzeInfo
- Publication number
- EP2062338A1 EP2062338A1 EP07801622A EP07801622A EP2062338A1 EP 2062338 A1 EP2062338 A1 EP 2062338A1 EP 07801622 A EP07801622 A EP 07801622A EP 07801622 A EP07801622 A EP 07801622A EP 2062338 A1 EP2062338 A1 EP 2062338A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insulator body
- spark plug
- plug according
- housing
- housing head
- 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
- 239000012212 insulator Substances 0.000 claims abstract description 105
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 22
- 238000003466 welding Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 12
- 239000007769 metal material Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 8
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 4
- 239000000567 combustion gas Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000002482 conductive additive Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000013022 venting Methods 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
- H01T13/00—Sparking plugs
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/36—Sparking plugs characterised by features of the electrodes or insulation characterised by the joint between insulation and body, e.g. using cement
Definitions
- the invention relates to a spark plug for igniting a combustible gas mixture in an internal combustion engine, comprising an ignition electrode, an electrical supply line to which the ignition electrode is connected, an insulator body, through which the supply line is passed, and a housing head which sits sealingly on the insulator body and an external thread for screwing into an internal combustion engine carries.
- a spark plug is known, for example, from EP 1 265 328 B1.
- peak pressures of the order of 150 bar can occur. These peak pressures load the spark plug during operation and, even with dimensionally accurate manufacture and careful sealing, can cause combustion gases to exit the engine. In particular, in gas engines occurring peak pressures can also cause the insulator body is squeezed and explosively shoots out of the plug housing. In order to improve the pressure resistance of spark plugs and to prevent the pressing out of the insulator body, it was proposed in EP 1 265 321 B1 to clamp the insulator body between the housing head and the pipe housing and to weld the housing head and pipe housing together. In this way, the extrusion of the insulator body could be effectively countered and an improved seal can be achieved.
- the object of the invention is to increase life and reliability of a spark plug of the type mentioned on.
- the tubular housing has the function of protecting the spark plug from damage by external action and transmitting torque for screwing in the spark plug, and, on the other hand, clamping the isolator, this clamping function is achieved in the case of an inventive spark plug Take the spark plug through an insulator body bracket that presses the insulator body against the housing head with a preload.
- the tubular housing and the insulator body holder can be optimized separately with respect to their respective functions.
- the tube housing and the insulator body holder are made of different materials.
- the housing can be optimized independently of the insulator body holder and thus the risk of breakage can be substantially reduced.
- the insulator body holder is preferably made of a metallic material having a thermal expansion coefficient (XM in the temperature range of 0 0 C to 400 0 C with the thermal expansion coefficient ⁇ «of the insulator body the inequality OCM - OCK ⁇ 1 -10 "6 ZK fulfilled.
- the thermal expansion coefficient CCM of the insulator body holder is thus smaller than the thermal expansion coefficient oc ⁇ of the insulator body or exceeds less than 1 • 10" 6 ZK. In this way remains the bias voltage at which the insulator body sealing against the housing head is pressed, as far as possible preserved even during an ongoing heating of the spark plug, so that it is ensured even at elevated temperatures that the housing head sealingly seated on the insulator body.
- the insulator body of a spark plug and metal parts surrounding it can heat up to 400 ° C. and more during operation.
- the steels commonly used in the prior art have a coefficient of thermal expansion in the relevant temperature range of about 12.times.10.sup.- 6 to 15.times.10.sup.- 6 Z.sup.K, while the temperature coefficient of the insulator body, usually made of aluminum oxide, is typically about 3.times.10.sup.- 6 8 ⁇ 10 "6 ZK.
- the materials of the insulator body and the insulator body holder with respect to the thermal expansion coefficient coordinated so that permanently a better seal is achieved. Impairment by leakage gases can therefore be avoided in a spark plug according to the invention, so that results in a longer life.
- the insulator body may be made from a ceramic material commonly used in the art, for example aluminum oxide, or in particular also from aluminum nitride, which has an advantageously high coefficient of thermal expansion. Suitable expansion coefficients in particular have nickel-iron alloys with a nickel content of 25% by weight to 50% by weight. Steel, for example ST37 steel, is preferred as the material for the tubular housing.
- the insulator body holder is welded to the housing head via a butt weld or a wedge seam, a butt weld being particularly preferred.
- Wedge seams are sometimes referred to as V-seams and butt welds as I-seams.
- high-precision manufacturing can be performed by welding with a wedge or butt weld.
- Welding is particularly preferably carried out as arc welding, particularly preferably as inert gas welding, in particular as TIG welding (tungsten inert gas).
- arc welding the material is heated up around the weld to be formed. During the subsequent cooling, therefore, there is a length contraction, by which the insulator body is clamped with great force between the housing head and the insulator body holder. The length contraction caused by the welding thus ensures a higher pressing force, with which the insulator body is pressed against the housing head, and consequently also for a better seal against the ingress of gases from the combustion chamber of the engine.
- EP 1 265 328 B1 teaches the use of laser welding methods for producing spark plugs.
- Laser welding has the advantage of very high precision, making it predestined for high-precision manufacturing, as required for spark plugs.
- arc welding spark plugs which provides an improved seal between the insulator body and Show housing head. This improved sealing is effected by the contraction occurring during cooling of the weld.
- the measure according to the invention of pressing the insulator body against the housing head welded to it by means of an insulator body holder and arranging a vent opening in the tubular housing prevents impasting of candle parts from the tubular housing in the event of dangerous peak pressures in a simple and reliable manner. If such high peak pressures occur that the insulator body is pressed into the interior of the pipe housing despite the insulator body holder being welded to the housing head, the pressure can be discharged through the at least one vent opening in the jacket surface of the pipe housing without dangerous acceleration the insulator body and its imposition comes.
- Fig. 1 shows an embodiment of a spark plug according to the invention in a
- the spark plug 1 shown in FIG. 1 has a housing head 2 with an external thread 3 for screwing in an internal combustion engine and an ignition electrode 4 which is arranged in the housing head 2.
- the ignition electrode 4 is connected to an electrical supply line 5, which is also referred to as the center electrode.
- the supply line 5 is passed through an insulator body 6, which is pressed by an insulator body holder 7 with a bias against the housing head 2.
- the housing head 2 is seated with the interposition of a seal 8 in the form of a copper sealing ring sealingly on the insulator body 6.
- the insulator body holder 7 and the insulator body 6 are surrounded by a tubular housing 9 which is fixed to the housing head 2 by welding and carries a hexagon 13, with which the necessary for screwing the spark plug 1 in an internal combustion engine torque can be transmitted.
- the hexagon 13 is welded to the tubular housing 9.
- the insulator body holder 7 includes an annular space 20 which surrounds the insulator body 6 and is filled with a filling material for dissipating heat arising.
- the filler material contains ceramic powder or may even consist entirely of ceramic powder.
- the ceramic powder may be mixed with a binder and / or a heat-conductive additive, preferably in the form of a metal powder, for example copper.
- the filler material preferably comprises at least 50% by weight, more preferably at least 75% by weight, in particular at least 90% by weight, of ceramic powder, for example aluminum oxide and / or aluminum nitride.
- aluminum nitride has the advantage of good thermal conductivity.
- the insulator body 6 has an annular bead 11 around which the insulator body holder 7 engages.
- the insulator body holder presses in this way against an annular surface 12 of the insulator body 6 and thus exerts on the insulator body 6 the prestressing with which the insulator body 6 is pressed against the gasket 8 and the annular surface 10 of the housing head 2.
- the insulator body holder 7 is welded to the housing head 2.
- the insulator body holder 7 and the housing head 2 are overlappingly arranged in a partial region, in which the insulator body holder 7 and the housing head 2 are also overlapped.
- housing head 2 with the insulator body holder 7 connecting weld 25 is arranged.
- the tubular housing 9 and the housing head 2 are arranged overlapping in a partial area in which there is a weld 26 connecting the tubular housing 9 and the housing head 2.
- the housing head 2 has a first cylindrical surface, on which the insulator body holder 7 rests, and a second cylindrical surface, on which the tubular housing 9 rests on.
- the two cylindrical surfaces are each bounded by a step, against the annular surface of the insulator body holder 7 and the tubular housing 9 abut.
- the joint between the annular surface of the housing head 2 and the adjoining end of the insulator body holder 7 and the tubular housing 9 is filled during welding by the weld 25 and 26 respectively.
- Welds 25, 26 are butt welds produced by arc welding, namely TIG welding. Upon cooling of the welds 25, 26, the material contracts, so that the insulator body 6 is pressed by the insulator body holder 7 against the housing head 2. This leads to an improved seal.
- the insulator body 6 is made of a ceramic material such as alumina or aluminum nitride which has a thermal expansion coefficient between 4 • 10 "6 ZK and 8 ⁇ 10" 6 ZK in the temperature range of 0 0 C to 400 0 C.
- a ceramic material such as alumina or aluminum nitride which has a thermal expansion coefficient between 4 • 10 "6 ZK and 8 ⁇ 10" 6 ZK in the temperature range of 0 0 C to 400 0 C.
- composite ceramics for example ceramic materials which consist of at least 50% by weight, in particular at least 75% by weight, of aluminum nitride.
- the insulator body holder 7 is made of a metallic material whose thermal expansion coefficient a M the thermal expansion coefficient ⁇ «of the insulator body 6 in the relevant temperature range from 0 0 C to 400 0 C at most by 1 ⁇ 10 " 6 ZK, preferably at most by 5 • 10 " 7 / K, exceeds or is slightly smaller. It is particularly favorable, in particular, if the thermal expansion coefficient ⁇ , M of the insulator body holder 7 is slightly smaller than the thermal expansion coefficient ⁇ of the insulator body 6 then heating leads to an increase in the preload and thus to an even better seal.
- the thermal expansion coefficient ot M of the metallic material of the insulator body holder 7 is selected such that the metallic material when heated from 20 0 C to 400 ° C, in total less expands than the ceramic material of the insulator body 6 when heated from 2O 0 C. to 400 0 C. It is particularly advantageous if the total thermal expansion of the material of the insulator body holder 7 in the temperature range from 0 0 C to 400 ° C not more than 3 • 10 '3 , in particular not more than 2.5 • 10 ⁇ 3 , is.
- the metallic material of the insulator body holder 7 is a nickel-iron alloy having a nickel content of 25 wt .-% to 50 wt .-%.
- Suitable nickel-iron alloys are offered, for example, by the Deutsche Nickel AG under the names Diaton 36, Dilaton 41, Dilaton 42, Dilaton 46 and Dilaton 48.
- Dilaton 36 the coefficient of thermal expansion in the temperature range from 0 0 C to 400 0 C is only about 5.5 ⁇ 10 ⁇ / K
- Dilaton 42, whose thermal expansion coefficient in the temperature range from 0 0 C to 400 ° C. is about 6 • 10 "6 ZK.
- the tubular housing 9 is made of a commercially available steel, for example ST37 steel.
- the spark plug 1 is a pre-chamber spark plug, since the ignition electrode 4 is arranged in an antechamber 14, which can communicate through openings 15 with the combustion chamber of an internal combustion engine (not shown).
- Prechamber spark plugs are known, for example, from EP 0 675 272 A1, to which reference is made for further details and special features of prechamber spark plugs.
- the pre-chamber 14 is formed by a cap 16 which is inserted into the housing head 2. Nickel is particularly suitable as the material for the cap 16, the remaining Housing head 2 with the external thread 3 preferably made of steel, in particular ST52-3 or S355 steel, is made.
- the tube housing 9 in its lateral surface gas outlet openings 21 for the discharge of leakage gases.
- Corresponding gas outlet openings 22 can in principle also be arranged in the insulator body holder 7, but leakage gases within the annular space 20 are far less problematic, since there are no live parts in the annular space 20 and consequently there is no danger of shunts.
- leakage gases are particularly harmful in the region in which the supply line 5 (center electrode) emerges from the ceramic body 6 and is connected, for example, to a strand of a cable, since deposits there increase the risk of shunts.
- this seal 23 is a sealing ring which surrounds the part of the insulator body 6 protruding from the insulator body holder 7.
- the sealing ring 23 is in the illustrated embodiment, a plastic ring, such as a Teflon ring. Any leakage gases which seep out of the annular space 20 between the insulator body holder 7 and the insulator body 6 resting against the annular surface 12 are prevented from penetrating further by the sealing ring 23 and are discharged through the vent openings 21 out of the tube housing.
Landscapes
- Spark Plugs (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006043593A DE102006043593B3 (de) | 2006-09-16 | 2006-09-16 | Zündkerze |
PCT/EP2007/007127 WO2008031482A1 (de) | 2006-09-16 | 2007-08-13 | Zundkerze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2062338A1 true EP2062338A1 (de) | 2009-05-27 |
EP2062338B1 EP2062338B1 (de) | 2009-12-02 |
Family
ID=38521329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07801622A Active EP2062338B1 (de) | 2006-09-16 | 2007-08-13 | Zundkerze |
Country Status (8)
Country | Link |
---|---|
US (1) | US8053964B2 (de) |
EP (1) | EP2062338B1 (de) |
AT (1) | ATE450911T1 (de) |
DE (2) | DE102006043593B3 (de) |
DK (1) | DK2062338T3 (de) |
ES (1) | ES2337524T3 (de) |
PT (1) | PT2062338E (de) |
WO (1) | WO2008031482A1 (de) |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008040285A1 (de) * | 2008-07-09 | 2010-01-14 | Robert Bosch Gmbh | Bauraumoptimierte Zündkerze |
DE102011012528B3 (de) * | 2011-02-26 | 2012-05-24 | Dkt Verwaltungs-Gmbh | Vorkammerzündkerze |
RU2496197C1 (ru) * | 2012-02-29 | 2013-10-20 | Общество С Ограниченной Ответственностью "Рефмашпром" (Ооо "Рефмашпром") | Свеча зажигания |
EP2869819A4 (de) * | 2012-07-09 | 2016-03-09 | Holden Brien Vision Inst | Zusammensetzungen, verfahren und/oder vorrichtungen zur prävention und/oder behandlung des trockenen auges |
EP2690726B1 (de) | 2012-07-25 | 2017-10-18 | Caterpillar Energy Solutions GmbH | Zündkerze |
JP6297132B2 (ja) * | 2013-03-15 | 2018-03-20 | フェデラル−モーグル・イグニション・カンパニーFederal−Mogul Ignition Company | コロナ点火コイルのための高電圧接続封止方法 |
DE102013226667B4 (de) | 2013-12-19 | 2018-03-01 | Robert Bosch Gmbh | Zündkerze mit Dichtung aus einem nichtleitenden Material |
DE202014001752U1 (de) * | 2014-02-24 | 2015-05-27 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Zylinderkopf mit einer verbesserten Zündkerzenmontageöffnung |
EP3255743A4 (de) * | 2015-02-04 | 2018-06-13 | Imagineering, Inc. | Zündkerze |
EP3173596B1 (de) | 2015-11-25 | 2020-04-01 | Caterpillar Energy Solutions GmbH | Vorverbrennungskammeranordnung für verbrennungsmotoren |
DE102016206992A1 (de) * | 2016-04-25 | 2017-10-26 | Dkt Verwaltungs-Gmbh | Zündkerze |
DE102017117452B4 (de) | 2016-08-16 | 2022-02-10 | Federal-Mogul Ignition Gmbh | Zündkerze und Verfahren zu ihrer Herstellung |
DE102016120984B4 (de) | 2016-11-03 | 2018-10-18 | Federal-Mogul Ignition Gmbh | Vorkammerzündkerze für eine mit Gas betriebene Brennkraftmaschine und Verfahren zu deren Herstellung |
DE102017202238B3 (de) * | 2017-02-13 | 2018-02-08 | Dkt Verwaltungs-Gmbh | Zündkerze und ein Verfahren zur Herstellung einer Zündkerze |
BR112019024923A2 (pt) * | 2017-05-26 | 2020-06-23 | Swift Fuels, Llc | Conjunto de vela de ignição |
JP6450821B1 (ja) * | 2017-11-02 | 2019-01-09 | フェデラル モーグル イグニッション ゲーエムベーハーFederal−Mogul Ignition GmbH | スパークプラグ、およびスパークプラグの製造方法 |
DE102017129056B4 (de) * | 2017-12-06 | 2019-12-19 | Federal-Mogul Ignition Gmbh | Zündkerze mit einem Zuführkanal für Brennstoff |
DE102019116191A1 (de) * | 2019-06-14 | 2020-12-17 | Bayerische Motoren Werke Aktiengesellschaft | Vorkammerzündsystem für eine fremd gezündete Hubkolben-Brennkraftmaschine |
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DE102020101552A1 (de) | 2020-01-23 | 2021-07-29 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zum Betreiben einer fremd gezündeten Hubkolben-Brennkraftmaschine |
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US4029990A (en) * | 1976-01-09 | 1977-06-14 | Champion Spark Plug Company | Spark plug construction |
US4412151A (en) * | 1980-09-02 | 1983-10-25 | Charles W. Taggart | Piezoelectric crystal spark plug |
CH669691A5 (de) * | 1986-02-18 | 1989-03-31 | Max Pasbrig | |
JPH0487286A (ja) * | 1990-07-30 | 1992-03-19 | Ngk Spark Plug Co Ltd | スパークプラグの絶縁碍子 |
ATE156568T1 (de) * | 1994-03-29 | 1997-08-15 | Dieter Dr Kuhnert | Vorkammerzündeinrichtung |
DE19500216A1 (de) * | 1995-01-05 | 1996-07-11 | Stihl Maschf Andreas | Dekompressionsventil |
JPH11329666A (ja) * | 1998-05-15 | 1999-11-30 | Ngk Spark Plug Co Ltd | スパークプラグ |
EP1120645A3 (de) * | 2000-01-27 | 2004-07-07 | Ngk Spark Plug Co., Ltd. | Gassensor |
JP2002124362A (ja) * | 2000-10-19 | 2002-04-26 | Ngk Spark Plug Co Ltd | 圧力センサ内蔵点火プラグ |
AT410150B (de) * | 2001-06-05 | 2003-02-25 | Jenbacher Ag | Zündkerze einer brennkraftmaschine |
JP2003077620A (ja) * | 2001-06-20 | 2003-03-14 | Denso Corp | スパークプラグおよびその製造方法 |
ATE330348T1 (de) | 2002-02-22 | 2006-07-15 | Dieter Dr Kuhnert | Vorkammerzündkerze und verfahren zur herstellung derselben |
EP1385242B1 (de) * | 2002-07-22 | 2005-02-02 | Jenbacher Aktiengesellschaft | Zündkerze |
WO2004107518A1 (en) * | 2003-05-30 | 2004-12-09 | In-Tae Johng | Ignition plugs for internal combustion engine |
JP2006009783A (ja) * | 2004-05-21 | 2006-01-12 | Denso Corp | 内燃機関用点火装置 |
ES2777877T3 (es) * | 2004-06-24 | 2020-08-06 | Woodward Inc | Bujía de precámara |
DE102004046895A1 (de) * | 2004-09-28 | 2006-03-30 | Robert Bosch Gmbh | Zündkerze und Verfahren zu deren Herstellung |
US20070236122A1 (en) * | 2006-04-10 | 2007-10-11 | Borror Bruce M | Pre-chamber type spark plug |
-
2006
- 2006-09-16 DE DE102006043593A patent/DE102006043593B3/de not_active Expired - Fee Related
-
2007
- 2007-08-13 DK DK07801622.7T patent/DK2062338T3/da active
- 2007-08-13 EP EP07801622A patent/EP2062338B1/de active Active
- 2007-08-13 WO PCT/EP2007/007127 patent/WO2008031482A1/de active Application Filing
- 2007-08-13 US US12/310,905 patent/US8053964B2/en active Active
- 2007-08-13 DE DE502007002224T patent/DE502007002224D1/de active Active
- 2007-08-13 AT AT07801622T patent/ATE450911T1/de active
- 2007-08-13 PT PT07801622T patent/PT2062338E/pt unknown
- 2007-08-13 ES ES07801622T patent/ES2337524T3/es active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2008031482A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE502007002224D1 (de) | 2010-01-14 |
PT2062338E (pt) | 2010-02-11 |
ES2337524T3 (es) | 2010-04-26 |
ATE450911T1 (de) | 2009-12-15 |
DK2062338T3 (da) | 2010-04-06 |
US20100001626A1 (en) | 2010-01-07 |
DE102006043593B3 (de) | 2008-04-10 |
US8053964B2 (en) | 2011-11-08 |
WO2008031482A1 (de) | 2008-03-20 |
EP2062338B1 (de) | 2009-12-02 |
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