EP3465849A1 - Spark plug for a high-frequency ignition system - Google Patents
Spark plug for a high-frequency ignition systemInfo
- Publication number
- EP3465849A1 EP3465849A1 EP17721523.3A EP17721523A EP3465849A1 EP 3465849 A1 EP3465849 A1 EP 3465849A1 EP 17721523 A EP17721523 A EP 17721523A EP 3465849 A1 EP3465849 A1 EP 3465849A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- spark plug
- insulator
- gap
- ground electrode
- 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 38
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 239000000615 nonconductor Substances 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 239000000454 talc Substances 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
- H01T13/50—Sparking plugs having means for ionisation of 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
- H01T13/00—Sparking plugs
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/22—Sparking plugs characterised by features of the electrodes or insulation having two or more electrodes embedded in 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
- H01T13/46—Sparking plugs having two or more spark gaps
-
- 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
- H01T13/46—Sparking plugs having two or more spark gaps
- H01T13/462—Sparking plugs having two or more spark gaps in series connection
Definitions
- the invention relates to a spark plug for an internal combustion engine, in particular with a high-frequency ignition system, comprising a center electrode, a ground electrode and an electrical insulator disposed between the center and ground electrode, wherein on the insulator a central electrode connection point for electrically connecting the center electrode to an ignition system is provided, wherein the center and ground electrode project beyond the insulator at one axial end of the insulator and each with an insulator axially projecting part forming a central electrode end and a ground electrode end, wherein the center electrode end and the ground electrode end arranged and in that an axial region of a gap is formed between them in the axial direction, spaced apart from the insulator, according to the preamble of patent claim 1.
- spark plugs In internal combustion engines, spark plugs have the task of igniting a fuel or air / fuel mixture located in a combustion chamber through sparks that jump over between the spark plug electrodes. To do this, the ignition voltage must be introduced well insulated into the combustion chamber.
- Known spark plugs 10 as shown by way of example in FIG. 1 and known for example from DE 198 43 712 A1, conventionally have a metallic, tubular housing 12 which comprises a ground electrode 16 at its ignition-side end 14 and an insulating body 18 with its inner bore , The tubular housing 12 carries actuating means, for example in the form of an external hexagon 20 and an external thread 22, with which the spark plug 10 is sealingly fixed in a plug bore of an engine block.
- the insulating body 18 is sealed against the metallic housing 12 at mostly several points and has a longitudinal bore, in the connection side 26, a connecting bolt 24 for an ignition cable to be determined thereon or for a directly to be fastened ignition coil (not shown) protrudes.
- Ignition side 14 a center electrode 28 is disposed in the Isolier Sciencesbohrung, which extends in the longitudinal direction through the insulating body 18 and is separated from the ground electrode 16 by a spark gap.
- the center electrode 28 is often made of an electrically conductive sintered material due to the improved erosion resistance.
- the insulating body 18 is usually made of ceramic. Inner gaskets 30 with talcum ring seal the insulating body 18 against the housing 12. An outer sealing ring 32 seals a seat of the spark plug in the assembled state. Furthermore, a suppression resistor 34 is arranged in the course of the center electrode 28.
- the insulating body 18 is equipped on its outer circumference with a Kriechstrombarriere 36.
- a spark plug which has a center electrode and two ground electrodes, wherein a ground electrode with the Center electrode defines a radial spark gap and the other asseieiektroktrode with the center electrode an axial spark gap.
- So-called gasoline combustion methods with direct injection of the fuel have a great potential in terms of fuel consumption reduction due to the possibility of representing a stratified charge in the combustion chamber.
- the non-homogeneous mixture in the combustion chamber places increased demands on the ignition method used with regard to reliable ignition at the appropriate time. Fluctuations of any kind reduce, for example, the quality of the ignition and thus the efficiency of the entire engine.
- the position of the ignitable mixture can vary slightly and, on the other hand, the hook of a ground electrode of the spark plug can have a disruptive effect on the mixture formation.
- Helpful for a direct injection combustion process is an ignition system with a greater spatial extent into the combustion chamber.
- a corresponding high frequency plasma ignition device comprises a series resonant circuit with an inductance and a capacitance and a high frequency source for the resonant excitation of this series resonant circuit.
- the capacitance is represented by inner and outer conductor electrodes with intervening dielectric. These electrodes extend with their outermost ends at a predetermined mutual distance into the combustion chamber.
- a method for ignition in which by means of a DC voltage pulse, a discharge plasma is generated, which is then ionized by means of an RF field.
- the DC pulse and a starting signal! an HF generator are supplied together to a spark electrode of a spark plug.
- a counter electrode of the spark plug is grounded.
- the spark plug is a coaxial structure and consists essentially of a central electrode surrounded by an insulator and an outer electrode connected to the spark plug housing.
- the ignition coil provides the spark plug with a high voltage pulse. Between the electrodes a spark is created which initiates combustion.
- An alternative method in which a high-frequency voltage is applied to the spark plug in addition to the applied high voltage of the ignition coil in order to extend the spark duration is described in DE 10 2013 215 663 A1.
- the invention is based on the object, a spark plug of the o.g. To improve the type of ignition safety and function.
- a spark plug of o.g. Art provided that at least one additional electrode is provided, which is electrically isolated from the ground electrode and the center electrode to the spark plug and projects beyond the insulator at the axial end of the insulator and with an insulator axially projecting part forms an additional electrode end, wherein the auxiliary electrode end projects into the axial region of the gap between the center electrode end and the ground electrode end or into a region of the gap radially adjacent to the axial region of the gap.
- a spark plug is available with three electrodes which can be connected to one another independently of one another by means of an ignition system, which in conventional internal combustion engines have no or at most slight modifications, For example, on the spark plug, can be used and the use or retrofitting a Hochfrequenzzündstrom allowed in conventional internal combustion engines.
- the additional electrode divides the axial region of the gap between the center electrode end and the ground electrode end or the region of the gap which is radially adjacent to the axial region of the gap in each case into two spark gaps.
- a compatibility of the spark plug with conventional spark plug receptacles in a conventional cylinder head is achieved in that the ground electrode is formed as a metal housing which surrounds the insulator in a predetermined axial portion, and wherein at one, the ground electrode end facing axial end of the metal housing a thread is arranged.
- a seal between a space into which the electrode ends protrude and an environment is achieved in that at least one inner seal between the metal housing and the insulator and at least one outer seal, in particular a sealing ring, are arranged on the metal housing.
- a particularly compact design of the spark plug is achieved in that the first spark gap extends along a longitudinal axis of the center electrode in the axial direction.
- a dual air spark plug with improved ignition characteristics is achieved by arranging and forming the center electrode end and the auxiliary electrode end such that a second spark gap is formed between them in the axial direction spaced apart from the insulator, with the second spark gap extends along a longitudinal axis of the central electrode in the axial direction and wherein the first and second spark gap are arranged in alignment with each other in the axial direction.
- a reliable generation of an air spark between the center electrode and the additional electrode and between the additional electrode and the ground electrode upon application of a high voltage only to the center electrode is achieved in that the Zündfunkenpiecen (156, 166) are at least 0.2 mm long.
- a particularly compact construction of the spark plug with controlled impedance for the high-frequency signal, which rests between the center electrode and the additional electrode is achieved in that the additional electrode is arranged radially inside the insulator and extends there substantially parallel to the ground electrode and radially spaced therefrom, wherein an additional electrode connection point for electrically connecting the additional electrode to an ignition system is provided on the insulator.
- the impedance of the RF feed lines in the candle to the electrode ends depends essentially on the distance of the additional electrode to the ground electrode and the permittivity of the filling material.
- the additional electrode end is formed as a closed loop, which begins at the additional electrode and re-enters the insulator and extends there as another additional electrode parallel and constantly spaced from the ground electrode and radially inside the insulator, said further additional electrode is electrically connected to the additional electrode connection point.
- a particularly simple and cost-effective production of the spark plug is achieved in that the additional electrode end is L-shaped and has a free end.
- ground electrode end is L-shaped and has a free end.
- ground electrode end is formed as a closed loop, which starts and ends at the ground electrode.
- Fig. 1 is a known in the prior art spark plug for internal combustion engines in a sectional view
- Fig. 2 shows a first preferred embodiment of an inventive
- 3A is an enlarged detail of an ignition-side end of the spark plug according to FIG. 2 in a sectional view with an auxiliary electrode protruding into the axial region of the gap;
- 3B shows an enlarged section of an ignition-side end of the spark plug according to FIG. 2 with an additional electrode protruding into a region of the gap radially adjacent to the axial region of the gap;
- Fig. 4 shows a second preferred embodiment of an inventive
- Fig. 5 shows a third preferred embodiment of an inventive
- the first preferred embodiment of a spark plug 100 comprises a center electrode 128 and a ground electrode 112 in the form of a metal housing, which encloses an insulating 118 over a predetermined axial section and at an ignition-side end 114, an external thread 122 and at a terminal-side end 126 has a central electrode pad 124 for electrically connecting the center electrode 128 to an ignition system (not shown).
- a hexagon 120 is formed on the ground electrode 112 in the form of the metal housing, which serves for engagement of a tool (spark plug wrench) for mounting or dismounting the spark plug on an engine block of an internal combustion engine.
- the center electrode 128 is disposed in the insulator 118 electrically with the center electrode pad 124 at the terminal end 126 of the spark plug 100 connected and projects beyond the ignition-side end 1 4 in the axial direction of the insulating body 118 with a part which forms a center electrode end 140.
- the center electrode end 140 is rectilinear, electrically connected to the center electrode 128, and extends along a central longitudinal axis 144 of the center electrode 128.
- the center electrode end 140 is disposed coaxially with the central longitudinal axis 144.
- the center electrode 128 may also be arranged eccentrically with respect to the central longitudinal axis 144.
- the ground electrode 112 has, at the firing end 114, a portion forming a ground electrode end 142 which axially projects over the insulating body 118 and is electrically connected to the ground electrode 112, i. with the metal housing, is connected.
- the ground electrode end 142 is L-shaped and extends to intersect the central longitudinal axis 144. In this way, along the central longitudinal axis 144 and axially spaced from the insulating member 118, an axial portion 170 of a gap 146 is formed between the center electrode 128 and the ground electrode 112 and between the center electrode end 140 and the ground electrode end 142, respectively.
- an additional electrode 150 is additionally provided, which is arranged on the spark plug 100 in an electrically insulated manner from the center electrode 128 and the ground electrode 112.
- the additional electrode 150 is disposed in the insulating body 118 and extends in the insulating body 118 radially spaced parallel to the center electrode 128.
- an additional electrode pad 152 At or near the terminal end 126 is disposed on the insulating body 118, an additional electrode pad 152, which is electrically connected to the additional electrode 150 and for electrically connecting the auxiliary electrode 150 to an ignition system.
- an additional electrode end 154 is arranged, which is electrically connected to the additional electrode 150 and projects beyond the insulating body 118 in the axial direction.
- the auxiliary electrode end 154 is L-shaped and extends to project into the axial region 170 of the gap 146 between the center electrode end 140 and the ground electrode end 142 in an alternative illustrated in FIG. 3A.
- a second spark gap 156 along the central longitudinal axis 144 and at an axial distance from the insulating member 118 is a second spark gap 156 between the center electrode 128 and the auxiliary electrode 150 and formed between the center electrode end 140 and the additional electrode end 154 and a first spark gap 166 between the additional electrode 150 and the ground electrode 112 and between the additional electrode end 154 and the ground electrode end 142 is formed or defined
- the length of the second spark gap 156 is smaller or shorter than the length of the first spark gap 166, as can be seen directly from FIGS. 3A and 3B.
- Fig. 3B shows a second alternative, wherein like reference numerals denote functionally identical parts as in Fig. 3A, so that reference is made to their explanation in the above description of Fig. 3A.
- the additional electrode end 154 is likewise L-shaped and extends up to a region 172 of the gap 146 which is radially adjacent to the axial region 170 of the gap 146.
- the auxiliary electrode end 154 intersects the central longitudinal axis 144 between the center electrode end 140 and the ground electrode end 142 - as shown in Fig. 3B - or not.
- spark gap (s) applies in the second alternative to the first alternative above said analog.
- FIG. 4 shows a second preferred embodiment of a spark plug 100 according to the invention.
- functionally identical parts are designated by the same reference numerals as in FIGS. 2 and 3, so that reference is made to the above description of FIGS. 2 and 3 for explanation thereof .
- the additional electrode end 154 and the ground electrode end 142 are formed at the ignition-side end 114 of the spark plug 100 as a closed loop without a free end.
- the loop of the ground electrode end 142 begins and ends at the ground electrode 112 or the metal housing which forms the ground electrode 112.
- the loop of the additional electrode end 154 starts from the additional electrode 150 on the insulating body 118 and ends at the insulating body 118 radially spaced from the starting point of the loop of the additional electrode end 154 on the insulating body 118. This achieves a Means torstabhne when using the spark plug 100 according to the invention with a high-frequency ignition system (not shown).
- FIG. 5 shows a third preferred embodiment of a spark plug 100 according to the invention.
- functionally identical parts are designated by the same reference numerals as in FIGS. 2, 3 and 4, so that their explanation is based on the above description of FIGS. 2, 3 and 5 is referenced.
- a further additional electrode 150a is provided, which is arranged in the insulating body 118 and extends substantially parallel to the central electrode 128 and radially spaced therefrom.
- the loop of the additional electrode end 154 starts from the additional electrode 150 on the insulating body 118 and ends on the insulating body 118, wherein this loop is electrically connected to the further additional electrode 150a here.
- the additional additional electrode 150 a is electrically connected to the auxiliary electrode pad 152.
- the additional electrode connection point 152 is, for example, formed annularly on the outer circumference of the insulating body 118 and can thus be electrically contacted by a corresponding additional electrical contact in a spark plug connector (not shown). This achieves a further impedance stabilization when using the spark plug 100 according to the invention with a plasma ignition system (not shown).
- the additional electrode 150 and the additional additional electrode 150a are integrally formed in the insulating body as a tube or rotationally symmetrical and coaxial with the central electrode 128.
- the operation of the spark plug 100 according to the invention will be described according to the above exemplified Fig. 2 to 5.
- a high voltage pulse to the center electrode 128, a double air spark is produced between the center electrode 128 and the auxiliary electrode 150 and between the center electrode end 140 and the auxiliary electrode end 154 on the one hand and the auxiliary electrode 150 and the ground electrode 112 or the auxiliary electrode end 154 and the ground electrode end 142 on the other hand.
- the additional electrode 150 is depending on the connected ignition system or ignition circuit passive or active.
- the additional electrode 150 is electrically connected to ground, for example (single spark), electrically connected to an electrical capacitance (passive) or electrically connected to an RF amplifier (active).
- RF energy is introduced via the additional electrode 150, so that a plasma is excited from the ignition spark, which then arises correspondingly at the ignition-side end 114 of the spark plug 100 and remains active until the supply of the HF spark Energy is stopped.
- the center electrode 128 When using the spark plug 100 with a high frequency ignition system having a high voltage source (high DC voltage source) such as an ignition coil and a high frequency power source, the center electrode 128 is a high voltage electrode provided for electrical connection to the high voltage source of the high frequency ignition system. In this way, a short-time high voltage generated by the high voltage source (electrical high voltage pulse DC) is conducted to the center electrode 128 and there causes a spark between the center electrode 128 and the auxiliary electrode 150 and between the center electrode end 140 and the additional electrode end 154 on the one hand and the additional electrode 150 and the ground electrode 112 and the additional electrode end 154 and the ground electrode end 142 on the other hand (double air spark).
- high voltage source high DC voltage source
- This spark results in the generation of a plasma between the center electrode 128 and the ground electrode 112 via the auxiliary electrode 150 and between the center electrode end 140 and the ground electrode end 142 via the auxiliary electrode end 154 in the first and second spark gaps 166, 156
- the term "electrical high DC voltage pulse” here refers to an electrical DC voltage pulse with a high electrical voltage of, for example, 8 kV to 12 kV.
- the auxiliary electrode 150 is a high frequency electrode provided for electrical connection to the high frequency source of the high frequency ignition system. In this way, a high-frequency electrical power generated by the high-frequency source is passed to the auxiliary electrode 150 and there leads to further heating of the plasma previously generated by the spark due to the high DC voltage pulse, so that this plasma between the auxiliary electrode 50 and the ground electrode 112 and between the auxiliary electrode end 154 and the ground electrode end 142, or in a space around the auxiliary electrode end 154 and the ground electrode end 142, for a certain period of time this period of time is significantly longer (up to several milliseconds) than the period of time in which the actual spark would be present (a few nanoseconds).
- More important than a constant impedance of the axial lead is the stabilization of the impedance of the RF plasma.
- a spatial stabilization of the RF plasma is necessary. This is done by a possible equidistant distance between the additional electrode end 154 and the ground electrode end 142 between which the RF plasma burns.
- stirrups are conceivable as a construction, but also, for example, holey hemispheres, etc.
- the RF plasma can thus be protected from blowing, which results in an undesirable change in the impedance of the HF plasma.
- the intermediate electrode 150 may even be structurally not axially aligned.
Landscapes
- Spark Plugs (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016006350.5A DE102016006350A1 (en) | 2016-05-23 | 2016-05-23 | Spark plug for a high-frequency ignition system |
PCT/EP2017/000480 WO2017202482A1 (en) | 2016-05-23 | 2017-04-11 | Spark plug for a high-frequency ignition system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3465849A1 true EP3465849A1 (en) | 2019-04-10 |
EP3465849B1 EP3465849B1 (en) | 2020-02-12 |
Family
ID=58671563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17721523.3A Active EP3465849B1 (en) | 2016-05-23 | 2017-04-11 | Spark plug for a high-frequency ignition system |
Country Status (8)
Country | Link |
---|---|
US (1) | US10971902B2 (en) |
EP (1) | EP3465849B1 (en) |
JP (1) | JP2019517117A (en) |
KR (1) | KR102141752B1 (en) |
CN (2) | CN113054535B (en) |
DE (1) | DE102016006350A1 (en) |
TW (1) | TW201742343A (en) |
WO (1) | WO2017202482A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108336644B (en) * | 2018-04-17 | 2023-08-18 | 上海极燃汽车科技有限公司 | Multiple gap spark plug |
DE102018118263A1 (en) * | 2018-07-27 | 2020-01-30 | Rosenberger Hochfrequenztechnik Gmbh & Co. Kg | Device for igniting a fuel mixture, transmission element for transmitting an ignition signal, ignition device and circuit device |
DE102018125080A1 (en) * | 2018-10-10 | 2020-04-16 | Rosenberger Hochfrequenztechnik Gmbh & Co. Kg | Ignition system with an ignition spark enlarged by an HF plasma of a spark plug with a prechamber and an associated method |
US11365685B2 (en) * | 2020-02-20 | 2022-06-21 | Ford Global Technologies, Llc | Methods and systems for a series gap igniter with a passive prechamber |
KR20210155934A (en) * | 2020-06-17 | 2021-12-24 | 현대자동차주식회사 | Dual sprrk plug |
US11545816B2 (en) | 2020-11-04 | 2023-01-03 | Federal-Mogul Ignition Gmbh | Spark plug with multiple spark gaps |
KR20230027482A (en) * | 2021-08-19 | 2023-02-28 | 현대자동차주식회사 | Spark plug |
KR20230037235A (en) * | 2021-09-09 | 2023-03-16 | 현대자동차주식회사 | System of controlling multi- ignition coil |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1318391A (en) * | 1919-10-14 | William j | ||
GB670979A (en) * | 1949-03-21 | 1952-04-30 | Thomas Joseph O Carroll | Improvements in or relating to sparking plugs |
DE2554517A1 (en) * | 1974-12-26 | 1976-07-08 | Ford Werke Ag | Sparking plug for IC engines - has an insulated central electrode a radial earthed electrode and auxiliary electrodes |
US4004562A (en) * | 1974-12-26 | 1977-01-25 | Ford Motor Company | Multiple air gap spark plug having resistive electrode coupling |
US3956664A (en) * | 1975-03-06 | 1976-05-11 | Ford Motor Company | Multiple air gap spark plug |
US4317068A (en) * | 1979-10-01 | 1982-02-23 | Combustion Electromagnetics, Inc. | Plasma jet ignition system |
EP0134355A1 (en) * | 1983-09-05 | 1985-03-20 | Ying-Chung Chang | Bridge electrode type of spark plug |
DE4020922A1 (en) * | 1990-07-02 | 1992-01-16 | Didier Werke Ag | SPARK PLUG |
CN2297812Y (en) * | 1997-03-26 | 1998-11-18 | 田永志 | Multipolar sparking plug |
US5936332A (en) * | 1997-07-21 | 1999-08-10 | Century Development International Ltd. | Spark plug |
JP4089012B2 (en) | 1997-09-24 | 2008-05-21 | 株式会社デンソー | Spark plug |
JP2005061310A (en) * | 2003-08-11 | 2005-03-10 | Toyota Motor Corp | Ignition plug and ignition system for internal combustion engine |
US7098581B2 (en) * | 2003-09-15 | 2006-08-29 | Cleeves James M | Spark plug |
DE102004058925A1 (en) | 2004-12-07 | 2006-06-08 | Siemens Ag | High-frequency plasma ignition device for internal combustion engines, in particular for directly injecting gasoline engines |
US8146555B2 (en) | 2007-04-17 | 2012-04-03 | GM Global Technology Operations LLC | Direct-injection spark-ignition system |
JP2009164089A (en) * | 2008-01-02 | 2009-07-23 | Masaaki Tsunoda | Spark plug extending intermediate electrode |
DE102008051185A1 (en) | 2008-02-14 | 2009-11-12 | Stanislav Tkadlec | Ignition method for generating discharge plasma by high frequency field and direct current impulse, particularly for internal combustion engine, involves supplying high frequency voltage on spark electrode and counter electrode |
JP5031915B1 (en) * | 2011-04-25 | 2012-09-26 | 日本特殊陶業株式会社 | Spark plug and manufacturing method thereof |
WO2013003561A2 (en) * | 2011-06-28 | 2013-01-03 | Federal-Mogul Ignition Company | Spark plug electrode configuration |
JP5805125B2 (en) | 2013-03-18 | 2015-11-04 | 三菱電機株式会社 | Ignition device |
-
2016
- 2016-05-23 DE DE102016006350.5A patent/DE102016006350A1/en not_active Withdrawn
-
2017
- 2017-04-11 JP JP2018562018A patent/JP2019517117A/en active Pending
- 2017-04-11 EP EP17721523.3A patent/EP3465849B1/en active Active
- 2017-04-11 KR KR1020187033197A patent/KR102141752B1/en active IP Right Grant
- 2017-04-11 US US16/304,056 patent/US10971902B2/en active Active
- 2017-04-11 WO PCT/EP2017/000480 patent/WO2017202482A1/en active Search and Examination
- 2017-04-11 CN CN202110295217.XA patent/CN113054535B/en active Active
- 2017-04-11 CN CN201780032356.5A patent/CN109155503B/en active Active
- 2017-05-22 TW TW106116908A patent/TW201742343A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN109155503A (en) | 2019-01-04 |
JP2019517117A (en) | 2019-06-20 |
DE102016006350A1 (en) | 2017-11-23 |
CN113054535B (en) | 2022-11-01 |
CN113054535A (en) | 2021-06-29 |
EP3465849B1 (en) | 2020-02-12 |
WO2017202482A1 (en) | 2017-11-30 |
KR102141752B1 (en) | 2020-08-06 |
KR20190008238A (en) | 2019-01-23 |
US20200235552A1 (en) | 2020-07-23 |
CN109155503B (en) | 2021-04-06 |
US10971902B2 (en) | 2021-04-06 |
TW201742343A (en) | 2017-12-01 |
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