CN102074897A - Step type spark plug - Google Patents
Step type spark plug Download PDFInfo
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- CN102074897A CN102074897A CN201010528387XA CN201010528387A CN102074897A CN 102074897 A CN102074897 A CN 102074897A CN 201010528387X A CN201010528387X A CN 201010528387XA CN 201010528387 A CN201010528387 A CN 201010528387A CN 102074897 A CN102074897 A CN 102074897A
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- 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
- H01T13/467—Sparking plugs having two or more spark gaps in parallel connection
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- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention relates to a spark plug having a central electrode (2) and a cover electrode (3) as ground electrode (3, 4, 6) and at least two side electrodes (4, 6). Both the side electrodes (4, 6) and the cover electrode (3) have free front edges (7, 8, 9) oriented in direction to the central electrode (2). The side electrodes (4, 6) of the ground electrode are arranged with their free front edges () 7, 8, 9 around a central axis X of the central electrode (2) such that the free front edges are arranged at different height levels so that ignition slots (11, 12, 13) are formed independently from each other.
Description
Technical field
The present invention relates to spark plug, it comprises central electrode, top electrode and as at least two lateral electrodes of building electrode, lateral electrode and top electrode all have the exposed side (face edge) towards the central electrode orientation separately.
Background technology
DE 25 54 517A1 relate to a kind of spark plug that is used for explosive motor, it has the cylinder spark-plug body and is installed in wherein spark plug insulator, extends axially central electrode that passes spark plug insulator and the building electrode that inwardly radially extends from spark-plug body with the mode of hermetic seal, is furnished with one or more than an auxiliary electrode between its opposed isolated end.For prolonging pilot spark and guaranteeing that it more in depth extends in the flammable mixture, the maximum potential density of the pilot spark that can also obtain to prolong simultaneously, DE 25 54 517A1 propose at least one auxiliary electrode is connected with the utmost point of center with the voltage source of building electrode or grounding electrode (ground electrode) by high-impedance component, and central electrode, at least one auxiliary electrode and building electrode are arranged by this mode that axially goes up that makes the sparking path that forms between them be positioned at spark plug continuously.See at profile, building electrode be arranged to its sparking path form the surface in the axial direction one be located immediately at another the top.
A kind of spark plug is disclosed in the summary of JP 2006318696, top electrode and at least one lateral electrode that it has central electrode, occurs with the building electrode form.Described lateral electrode is arranged to make its exposed side and central electrode towards the central electrode orientation laterally adjacent, and forms another gap outside the gap between central electrode and the top electrode.In addition, take special precautionary measures to be reflected to central electrode to prevent the fuel gas of colliding with top electrode.
DE 103 400 43A1 also disclose a kind of spark plug, and it has central electrode, top electrode and two lateral electrodes.For promptly adding heat insulator at start-up period, to prevent soot deposition at start-up period, DE 103 400 43A1 propose, and the external diameter of insulator leading portion and the difference of internal diameter are no more than 1.9 millimeters.
DE 600 11 017T2 also relate to the problem of spark plug, and it is devoted to improve anti-soot performance when cold-starting, and its purpose is to prevent to form the bridging that carbon granule constitutes.For example, be this purpose, two lateral electrodes are provided, it is arranged to laterally adjacent with central electrode.Be intended to use metal sleeve to solve the problems referred to above by the natural scale between the internal diameter that specifically reduces insulator external diameter and distal end part.
DE 699 27 730T2 relate to four-stroke ic engine, and it has controlled igniting and fuel direct injection.The axis of injection component is disposed in the plane that longitudinal axis comprised of cylinder to become in the scope at 60 ° of angles.In an improvement, DE 699 27 730T2 openly provide two kinds of igniters, and they are arranged in the different cylinder halfbodies, and injection component is arranged in each cylinder halfbody.
DE 10 2,005 024 266A1 disclose spark plug, and it has central electrode, top electrode and two lateral electrodes, thereby form two gaps.Therefore, this spark plug has a structure, if this structure guarantees that the carbon residue deposition is arranged on the insulator, laterally spark forms electric arc and can not form groove on insulator, thereby keeps the insulation property of insulator.
DE 10 2,007 047 893A1 also disclose spark plug, and it comprises central electrode, top electrode and at least one lateral electrode.If two lateral electrodes are arranged, it is arranged to its each exposed side respectively all on the sustained height below the top electrode.Under the situation of DE 10 2,007 047 893A1, key is on the base of the inner of part inwardly of auxiliary building electrode (side electrode) with towards the distance A between the surface of the main building electrode (top electrode) of central electrode, concerns A＞=Gm/3 with satisfying apart from Gm of gap.
EP 1 215 392A2 disclose a kind of element that is used for energy is introduced the space that limited media is full of, it has electrode, and this electrode comprises the connection that is used for the energy that the conveying capacity source produced and is arranged in this space described energy is introduced the end regions in this space.The end regions of electrode comprises a plurality of quilts apart from one another by the slender electrode part of opening, and each in them all is connected to the connection of electrode, so that energy is introduced the space.
EP 1 895 154A1 relate to the layout of a plurality of gaps in the combustion chamber.In the gap one is formed by spark plug (top electrode/central electrode).Other gap is formed by electrode pair, and described electrode pair sealing arrangement is in the periphery, thereby forms a plurality of peripheral gaps.Therefore, thus fuel gas can also can be lighted via the actual spark crack (actual spark) of spark plug by peripheral gap.
In the explosive motor of bringing into play function ideally by the operation of stratified charge principle, fuel is directly sprayed in the compressed air.In injection, fuel is atomized, gasifies and mixes with combustion air in the combustion chamber.Burning gases (being fuel-air mixture) are by spark ignitor.Spark plug commonly used has central electrode and building electrode, and this building electrode may be called as top electrode.The latter has the vertical mast (stem) that is roughly parallel to central electrode, and the igniting surface is bent into crossbeam from described vertical mast towards central electrode.Described crossbeam comprises exposed side.The igniting surface is positioned at the firing tip one axially spaced-apart place apart from central electrode, thereby forms gap, is adjusted to fuel injection beginning place with any means known generation pilot spark and this pilot spark therein.Like this can be with mode ignited flammable gas known to usually.Therefore, the element of spark plug will no longer at length be explained.
Herein, fuel gas (being fuel-air mixture) must have suitable mixing ratio, thereby can guarantee the burning that suitable point is fought so guaranteed to expect.Because tolerance and variation from a cycle of operation to the next cycle of operation, fuel gas may depart from this optimum mixture ratio, and this optimum mixture ratio can cause roughly stable igniting and/or combustion position.The volume that ignition point occurs between top electrode and central electrode is even more important.If between burn period, the best can be put burning mixt and not appear at the gap zone, and this can cause slowly or the imperfect combustion process, and under worst case even can cause catching fire.
Thus, when because tolerance or variation from a cycle of operation to the next cycle of operation make fuel-air mixture (combustible gas mixture) when changing, for example use spark plug always and be used to prevent that with having the lateral electrode of soot deposition or the spark plug of auxiliary electrode are unsuitable for guaranteeing sane combustion process.In its spray angle with respect to the gap between top electrode and central electrode, injector is configured such that usually roughly rarer combustible gas mixture of desired the best can be lighted.For example, injected fuel jet can depart from from the spray angle of its setting, makes that the combustible gas mixture in the gap zone between top electrode and central electrode is not that the best can be lighted, but crosses rich or rare excessively.
From this problem that is realized, target of the present invention is to use simple device to improve this spark plug of partly mentioning in background technology, even so that departing from of taking place to describe by way of example, also can guarantee sane and gas fuel burning process expectation.
Summary of the invention
According to the present invention, the spark plug of the feature by having claim 1 is realized this purpose, each lateral electrode that is embodied as building electrode is arranged to the central axis of its exposed side around central electrode, and it is spaced from this central axis, and in the axial direction by this way apart from one another by opening, be that each exposed side (side that comprises top electrode) is disposed on the different height levels, so that formed gap is spatially independently of one another.
The present invention is based on this discovery, promptly pilot spark (i.e. the electric current of Liu Donging) is always sought the path of minimum impedance.When fuel-air mixture not only richness but also when only rare, this minimum impedance occurs only.The jet axis that injector is set is to produce fuel-air mixture, on the conical surface of fuel jetting stream, has optimum fuel-air ratio just, in spark plug commonly used, the relevant gap that is used for fire fuel-air mixture is arranged between top electrode and the central electrode usually, just in having the zone of optimum fuel-air ratio.If the fuel jetting stream departs from desirable jet axis, the mixture in the relevant gap between top electrode and central electrode can become cross rich or rare excessively.If mixture is rare excessively, then impedance is too big, does not therefore have electric current can flow through and not have pilot spark to form.If mixture is rich excessively, air can not be ionized, and does not therefore have electric current can flow through and not have spark can be lighted (in fact pilot spark is extinguished by too much liquid) equally.On the other hand, in the present invention, in fact the single spark plug that is embodied as the staged spark plug is provided now, building electrode wherein (being top electrode and lateral electrode) is arranged to have reference point energy meter face separately, the surface forms the igniting path in other words, in this way, although the fuel jetting stream departs from its desirable jet axis, optimum fuel-air mixture always is arranged in one of them gap, make the ionization channels lead to central electrode form on a building electrode therein, make electric current to flow through and pilot spark can form so that fire fuel-air mixture.Pilot spark can be that the most weak part of impedance forms electric arc at different points.Improved spark plug is provided like this, and it does not have single, preferred gap, but has a plurality of gaps that are equal in fact.Therefore, generally speaking, even when not being in its perfect condition, still always may guarantee sane burning from a cycle of operation to another cycle of operation or because of other reason fuel jetting stream.The summation that the number of the gap that is equal in fact in this article, equals top electrode adds the number summation of lateral electrode or crossbeam.
According to the present invention, if advantageously the exposed side of each building electrode (being top electrode and lateral electrode) lays respectively on the identical spaced radial of the central axis of central electrode from directly looking up.Qiu Xing volume is contained in exposed side between the igniting tip of central electrode in fact.The obviously more favourable part of the present invention is, because a plurality of building electrodes that almost are equal to do not have building electrode to form preferred gap herein, described " controlled mixture volume " in fact is increased on three directions than present technology.Nature, exposed side also can be positioned at apart from central electrode different interval part radially.But main points are, the exposed side of each building electrode, and from axially, the vertical direction of spark plug is seen in other words, is positioned at the different spaced radial part that begins from central electrode or begin apart from the igniting tip of its exposure.
Therefore top electrode can be arranged to its igniting surface in known manner directly under the exposure igniting tip of central electrode, to form first gap.First electrode of lateral electrode, as farther building electrode, can be arranged to its exposed side together, on the top electrode surface that forms the igniting path, preferably in height the skew and on the circumferencial direction of central electrode lateral shift, to form second gap.Second lateral electrode, as farther building electrode, can be arranged to its exposed side preferably skew in height and on the circumferencial direction of relatively top electrode and first lateral electrode or exposed side lateral shift, preferably on them, to form the 3rd gap.Top electrode is preferably designed so that and makes its exposed side consistent with the central axis of central electrode herein, and perhaps projection slightly exceeds.The exposed side of lateral electrode is by the central axis transverse arrangement of turbo with respect to central electrode, and preferably lay respectively at the cylindrical of distance center electrode or apart from its outer circle diameter that exposes the igniting tip to the interval that equates.That is to say that they also in height are offset along horizontal positioned opposite.
Nature, it also is possible providing more than two lateral electrodes, although the number of building electrode obviously should be limited to avoid the thorough sealing with central electrode.
See into that from the vertical section building electrode is actually L shaped design, and have the vertical mast that is parallel to the central electrode extension, and crossbeam, exposed side is positioned on the crossbeam, bends the central axis of coming and pointing to central electrode from vertical mast.Have at the distance crossbeam and arrange second crossbeam on the vertical mast of an axially spaced-apart, to form the building electrode of ramification, therefrom respectively to have the side branch to come out also be possible to two crossbeams.Second crossbeam preferably is disposed on first crossbeam in this example.The exposed side of second crossbeam forms farther (" being equal to ") gap.
In it is preferably used, can be used to have the explosive motor of direct fuel injection according to spark plug of the present invention.Substitute and arrange a plurality of spark plugs in the combustion chamber, an independent spark plug is used, and it has multiple building electrode, and described building electrode has the gap that is independent of other gap separately.This makes combustion process more sane than combustion process of the prior art, even also be like this when the composition of the fuel-air mixture in the gap zone between top electrode and central electrode departs from ideal composition, this is because the layout of separate gap makes desirable fuel-air mixture come across at least in one of them gap.Obviously use and be not limited to described example.In having the explosive motor of manifold injection, in naturally aspirated engine and/or have external mix and form in the engine of mechanism-and it draws uniform mixture, and the spark plug that has the specific described advanced design of non-uniform phenomenon generation-use therein is feasible.
Be described in company with the present invention, play the advantage that prevents imperfect combustion even flame-out effect, it not only has with the fuel combustion that reduces or the pollutant emission of reduction is the favourable effect of form, and its also have with explosive motor longer useful life be the favourable effect of form.
Description of drawings
In addition, the further favourable improvement of the present invention claims and below be disclosed in the description to accompanying drawing, wherein:
Fig. 1 illustrates the vertical section along spark plug,
Fig. 2 illustrates plug ignition end magnification region among Fig. 1,
Fig. 3 illustrates the top view of firing tip among Fig. 2,
Fig. 4 is illustrated in the exemplary details of the fuel injection cone on the desirable spray angle,
The exemplary fuel that Fig. 5 illustrates desirable spray angle represented in the slip chart 4 sprays cone,
Fig. 6 illustrates the exemplary details that the fuel that departs from desirable spray angle that is different among Fig. 5 sprays cone.
In different accompanying drawings, identical part always has identical Reference numeral, therefore generally also only describes once.
Embodiment
Fig. 1 to Fig. 3 illustrates spark plug 1, it comprises central electrode 2 and top electrode 3 and as at least two lateral electrodes 4,6 of building electrode, is that lateral electrode 4,6 or top electrode 3 all have the exposed side (face edge) 7,8,9 towards central electrode 2 orientations.Be embodied as building electrode lateral electrode 4,6 each all be arranged to its exposed side 8,9 around the central axis X of central electrode 2 and there is the lateral separation, and they are in the axial direction apart from one another by opening, make in this way respectively exposed side 7,8,9 each all be disposed on the differing heights level, make that formed gap 11,12,13 is spatially all independently of one another.
Selected view means in lateral electrode 4 and 6 that only lateral electrode 4 is all visible.For lateral electrode 6, only can find out the end face (being represented by dotted lines) of its exposed side 9.
Arrange that central electrode 2 makes its central axis X with spark plug 1 consistent, and see at its firing tip to have columniform extension as igniting tip 16 from the vertical section.Top electrode 3 has vertical mast (stem) 17 respectively with lateral electrode 4 and 6, and it is parallel to central electrode 2 and central axis X, stretches out the crossbeam 18 that bends towards central electrode 2 in each from these masts.Lateral electrode 6 is similar L shaped design equally.
Can see that the vertical mast 17 of top electrode 3 has different axial lengths respectively with lateral electrode 4, so exposed side 7,8,9 is disposed on the differing heights with respect to firing tip or igniting tip 16.
The firing tip 14 of spark plug 1 is arranged in the combustion chamber of explosive motor.At least one fuel injector is arranged to its ejection side in the combustion chamber.Shown in example among Fig. 5, fuel injector is spurted into the combustion chamber with fuel jet, and fuel injector produces the taper fuel jet 21 with center line X1.Draw axis Y as auxiliary, it extends from inner in the drawing plane, stretches towards the conical surface of fuel jet 21 from center line X1 in other words.Alphabetical A on the axis Y represents mixture rich excessively at this, and this is undesirable concerning igniting, and letter b represents mixture rare excessively, and this is undesirable concerning burning.At the conical surface place of fuel jet 21, injected fuel and compressed air mixed make fuel-air mixture form fuel gas.For example (Fig. 4), fuel injector are set to be a predetermined spray angle with respect to spark plug 1, can enter gap 11 between top electrode 3 and central electrode 2 so that have the fuel gas that can be lighted of optimum air-fuel mixture ratio.
Fig. 5 represents that center line X1 departs from the example of the center line of fuel jet 21, and the center line of fuel jet 21 is set to the left side of the accompanying drawing in the drawing plane at first.Possible departing from by the intersection arrow represented.Therefore, in spark plug commonly used, for example the mixture that can not best light (promptly rich excessively mixture) will appear in the gap 11 between top electrode 3 and central electrode 2.On the other hand, in spark plug 1 according to the present invention, the best with optimum mixture ratio can be put burning mixt and appear in the zone of the gap 13 between second lateral electrode 6 and central electrode 2, so that can produce pilot spark 22 at this.On the other hand, in the zone of the gap 12 between first lateral electrode 4 and central electrode 2, the mistake lean mixture that appearance can not best be lighted.
Fig. 4 shows the details of fuel jet 21, and fuel jet 21 sprays with the spray angle of setting, and appears in the gap 11 between top electrode 3 and central electrode 2 so that can put burning mixt.Pilot spark 22 can be created in the gap 11, and the mistake lean mixture that can not best light appears in other two gaps 12 and 13.
In the represented example of Fig. 6, fuel jet 21 central axis X 1 depart from ideal position, and the spray angle of setting fuel 21 is the right side in the drawing plane upwards.As shown in the figure, can generate pilot spark 22 in the gap 12 between first lateral electrode 4 and central electrode 2, this is because the best can be put burning mixt and appear at this zone.Other two gaps 11 and 13 are positioned at the zone with the mixture that can not best light, are positioned at the zone with overrich mixture in other words.
Fig. 4 to 6 only illustrates the principle of pilot spark 22.Should point out that pilot spark 22 had both produced electric arc at gap 11 places, produce electric arc again in gap 12 or gap 13.
From Fig. 4 to Fig. 6 as can be seen, building electrode (that is to say top electrode 3 and two lateral electrodes 4 and 6) is arranged to its exposed side 7,8,9 in such a way towards central electrode 2, even promptly fuel jet 21 departs from ideal position, the mixture that can best light always appears among in gap 11,12 or 13 one, makes pilot spark 22 to produce in gap 11,12 or 13 one.Can omit the special control unit that is used in gap 11,12 or 13 one, producing pilot spark 22, this is because pilot spark 22 always produces electric arc on building electrode 3,4 or 6, because the existence of optimum flammable mixture, minimum () impedance plays a leading role on them.
For example, as shown in Figure 3, arrange that the crossbeam 18 of building electrode (being top electrode 3 and lateral electrode 4 and 6) is offset 120 ° of angles of circumference so that its exposed side 7,8,9 separately is arranged to around central electrode 2.In the selected view shown in Fig. 4 to Fig. 6, lateral electrode 4 and 6 diametrically contrapositions.The angle of circumference that provides as example is not to be restrictive naturally.One in the building electrode is arranged as more close or is possible further from another building electrode.For example, each building electrode or its form the vantage point on the surface in igniting path and can test method determine, in these methods, determine that fuel jet 21 can may depart from so that building electrode always is arranged in the zone of the mixture that appearance can best light from ideal position.Each building electrode 3,4 on the spark plug 1 and 6 position are determined in advance.Spark plug can be the product of large-scale production naturally, and wherein the building electrode in the combustion chamber 3,4 and 6 position, especially each building electrode 3,4 and 6 relative position relative to each other can method by experiment be determined.Obviously at first determine the position of top electrode 3 herein.Lateral electrode 4 and 6 is located in the predetermined deviation point with respect to top electrode 3.Determine the position of firing tip 14 in the combustion chamber by the fixing known way of spark plug, owing to be general knowledge, so do not need further explanation.
The invention provides spark plug 1, it can be called as the staged spark plug, its assurance has the interior sane combustion process of explosive motor of direct fuel injection, and this is because in the gap 11,12 or 13 always is arranged in the zone with the mixture that can best light.It is important in this that each building electrode (top electrode 3, lateral electrode 4,6) be arranged to its exposed side 7,8,9 in height be offset (ladder) and preferred on the circumferencial direction of central electrode other building electrode lateral shift relatively.At this, preferably the spaced radial of exposed side 7,8,9 distance center electrodes 2 is identical in each example.
From Fig. 1 and Fig. 2 as seen, exposed side 7,8,9 is arranged to make in their corner (being preferably the last corner 23,24 in the drawing plane) at least one with tangent as the auxiliary circle 26 that draws, from three-dimensional perspective, this circle 26 is in order to represent the spherical volume between the building electrode 3,4,6.This shows with respect to prior art to have enlarged " controlled mixture volume " between three gaps 11,12 and 13, this be since in the prior art single volume be limited in advance in the preferred gap between top electrode and the central electrode.Yet in the present invention, a plurality of gaps are independent of each other and form, and have avoided preferred gap.Obviously, the always not desirable sphere of volume of ideal shown in Fig. 1 and Fig. 2.Fundamental of the present invention is owing to three " on an equal basis " building electrodes 3,4 and 6 arranged offset in height, these building electrodes have exposed side 7,8,9 or form the surface in its igniting path (igniting surface) 19, formed gap 11,12 and 13 independent of each other on the position, so because pilot spark 22 ability that (promptly on diverse location) produces electric arc on different building electrodes always can realize sane burning.
In improvement of the present invention, might at least one vertical mast 17, arrange another or extra crossbeam 27 except that crossbeam 18, described extra beam is arranged in height be offset with respect to first crossbeam 18, preferably above the latter, for example, as by shown in the represented crossbeam 27 of dotted line among Fig. 2.Therefore in fact at least one building electrode might be designed to branch's building electrode, thereby form another (the 4th) gap.
Claims (10)
1. spark plug, it comprises central electrode (2) and as top electrode (3) and at least two lateral electrodes (4,6) of building electrode (3,4,6), described lateral electrode (4,6) and described top electrode (3) all have the exposed side (7,8,9) towards described central electrode (2) orientation separately, wherein
The described lateral electrode (4,6) that is embodied as building electrode is arranged to its exposed side (8,9) separately around the central axis (X) of described central electrode (2) and spaced with described central axis (X), and in such a way axially apart from one another by opening, this mode is disposed on the different height levels for each described exposed side (7,8,9), makes that the described gap (11,12,13) that forms is independently of one another.
2. spark plug according to claim 1, wherein
When radially seeing, the described exposed side of each of each described building electrode (7,8,9) is positioned at separately apart from the identical spaced radial place of described central axis (X) of described central electrode (2), and described building electrode is described top electrode (3) and described lateral electrode (4,6).
3. spark plug according to claim 1, wherein
When radially seeing, the described exposed side of each of each described building electrode (7,8,9) is positioned at separately apart from the different spaced radial place of described central axis (X) of described central electrode (2), and described building electrode is described top electrode (3) and described lateral electrode (4,6).
4. according to a described spark plug in the aforementioned claim, wherein
Described top electrode (3) is arranged to its igniting surface directly below the exposure igniting tip (16) of described central electrode (2), thereby form first gap (11), first lateral electrode (4) in the preferred described lateral electrode is arranged to its described exposed side (8) and in height is offset, be positioned at the surface in the formation igniting path of described top electrode (3), thereby form second gap (12), second lateral electrode (6) in the preferred described lateral electrode is arranged to its described exposed side (9) with respect to described top electrode (3) and described first lateral electrode (4) or described exposed side (7,8) skew in height, preferably above them, thereby form the 3rd gap (13).
5. according to a described spark plug in the aforementioned claim, wherein
It is consistent with the described central axis (X) of described central electrode (2) that described top electrode (3) preferably is designed to its described exposed side (7), the described exposed side (8,9) of described lateral electrode (4,6) is by described central axis (X) transverse arrangement of turbo with respect to described central electrode (2), and preferably is positioned at separately apart from the identical spaced radial place of excircle of described central electrode (2).
6. according to a described spark plug in the aforementioned claim, wherein
From the vertical section, described building electrode, be actually L shaped design, have and be parallel to the vertical mast (17) that described central electrode (2) extends, and from described vertical mast (17) crossbeam (18) crooked and that be orientated in direction towards the described central axis (X) of described central electrode (2), described exposed side (7,8,9) is positioned on the described crossbeam (18).
7. according to a described spark plug in the aforementioned claim, wherein
A plurality of crossbeams (18,27) are disposed on described building electrode or its described vertical mast (17), thereby in fact form at least one branch's building electrode.
8. the purposes of a spark plug (1) in explosive motor, a described spark plug in the claim especially as described above with fuel direct injection.
9. a spark plug (1) is in the explosive motor with fuel direct injection, in naturally aspirated engine and/or in the purposes of the engine that externally forms mixture, especially as a described spark plug in claim 1 to 7.
10. spark plug in the explosive motor that is used to have the fuel direct injection comprises:
Central electrode (2);
Top electrode (3);
At least two lateral electrodes (4,6), described lateral electrode (4,6) and described top electrode (3) all have the exposed side (7,8,9) towards described central electrode orientation separately,
Wherein said lateral electrode (4,6) and described top electrode (3) are building electrode, described lateral electrode (4,6) is arranged to its exposed side (8,9) separately around the central axis (X) of described central electrode (2) and spaced with described central axis (X), each described exposed side (7,8,9) is disposed on the different height levels, make that the gap (11,12,13) that forms is spatially independently of one another, one in the described gap (11,12,13) is arranged in the zone with the mixture that is fit to light.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009046092.6 | 2009-10-28 | ||
| DE102009046092.6A DE102009046092B4 (en) | 2009-10-28 | 2009-10-28 | Spark plug with at least three height-offset ground electrodes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102074897A true CN102074897A (en) | 2011-05-25 |
| CN102074897B CN102074897B (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010528387.XA Expired - Fee Related CN102074897B (en) | 2009-10-28 | 2010-10-28 | Step type spark plug |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102074897B (en) |
| DE (1) | DE102009046092B4 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762504A (en) * | 2013-12-25 | 2014-04-30 | 柳州正菱集团有限公司 | Spark plug |
| CN111492547A (en) * | 2018-04-11 | 2020-08-04 | 日本特殊陶业株式会社 | Spark plug |
| CN112582885A (en) * | 2020-11-04 | 2021-03-30 | 苏州劲能节能火花塞有限公司 | Open type automobile spark plug |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013160216A (en) * | 2012-02-09 | 2013-08-19 | Mitsubishi Electric Corp | Ignition apparatus |
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| JP2008171646A (en) | 2007-01-10 | 2008-07-24 | Denso Corp | Spark plug for internal combustion engine |
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| CN87103737A (en) * | 1987-05-29 | 1988-02-03 | 门晓光 | All-plastic casting fuel-economizing spark plug |
| US6064143A (en) * | 1995-11-15 | 2000-05-16 | Ngk Spark Plug Co., Ltd. | Multielectrode spark plug |
| CN2463993Y (en) * | 2000-07-10 | 2001-12-05 | 徐荣生 | Multi-contact sparking-plug |
| CN1630151A (en) * | 2003-12-19 | 2005-06-22 | 日本特殊陶业株式会社 | Spark plug |
| DE102007053428A1 (en) * | 2007-11-09 | 2009-05-14 | Robert Bosch Gmbh | Spark plug with a long service life |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762504A (en) * | 2013-12-25 | 2014-04-30 | 柳州正菱集团有限公司 | Spark plug |
| CN111492547A (en) * | 2018-04-11 | 2020-08-04 | 日本特殊陶业株式会社 | Spark plug |
| CN111492547B (en) * | 2018-04-11 | 2021-08-24 | 日本特殊陶业株式会社 | Spark plug |
| US11128109B2 (en) | 2018-04-11 | 2021-09-21 | Ngk Spark Plug Co., Ltd. | Spark plug having a plurality of ground electrodes |
| CN112582885A (en) * | 2020-11-04 | 2021-03-30 | 苏州劲能节能火花塞有限公司 | Open type automobile spark plug |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009046092A1 (en) | 2011-05-05 |
| DE102009046092B4 (en) | 2017-06-14 |
| CN102074897B (en) | 2014-07-02 |
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