• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Spark plug, and gas engine with such a spark plug, with an outer electrode (2) and a center electrode (3}, which are separated by an insulator (4), wherein the outer electrode (2) at one axial end of the spark plug (1) as an external thread (5) leads out and at this axial end between the outer electrode (2) and the middle Selekt rode (3) a cavity (7) is formed, wherein by the outer electrode (2) at least one continuous gas channel (8) is provided, the gas channel (8) inside in the cavity (7) opens and outside in the region of the external thread (5}, wherein between the outer Mün and the axial end of the outer electrode (2) at least one thread (14) of the external thread (5) is provided ,
    公开号:AT517703A4
    申请号:T551/2015
    申请日:2015-08-19
    公开日:2017-04-15
    发明作者:
    申请人:Hoerbiger Kompressortech Hold；
    IPC主号:
    专利说明:

    Spark plug and gas engine with spark plug
    The subject invention relates to a spark plug having an outer electrode and a center electrode, which are separated by an insulating body, wherein the outer electrode is designed as an external thread at one axial end of the spark plug and at this axial end between the outer electrode and the center electrode, a cavity is formed. Furthermore, the invention relates to a gas engine with a combustion chamber and a combustion chamber head, which at least partially closes the combustion chamber, wherein in the combustion chamber head a threaded opening is provided with an internal thread, wherein the gas engine is provided with a spark plug according to the invention.
    Gas engines operated, for example, with natural gas or liquefied gas have the advantage of lower emissions than other internal combustion engines, which includes gas engines particularly for large engines, e.g. on ships or in natural gas distribution grids.
    The known combustion methods of externally ignited gas engines are based on the principle that either combustible mixture is sucked in during the suction cycle, or is formed during the compression process by the injection of fuel gas. After compression of the mixture this is ignited by spark ignition, for example by means of a spark plug. It is also known to ignite the gas engine by injecting a small amount of auto-ignitable liquid fuel. The ignition can be done directly in the main combustion chamber (the cylinder) or in a pre-combustion chamber. In the case of a pre-combustion chamber, a combustible mixture is ignited in the pre-combustion chamber, causing a hot gas jet emerging from the pre-combustion chamber into the main combustion chamber, which ignites the combustible mixture in the main combustion chamber. The combustible mixture in the main combustion chamber is then traversed by generally turbulent flame fronts. Such a combustion method is described for example in DE 10 2014 00 229 A1.
    From the point of view of emissions and consumption, it is desirable to operate the gas engine in lean operation, ie with a fuel / air ratio greater than one. However, gas engines tend to misfire when lean of the mixture, which in turn can lead to high pollutant emissions, poor efficiency and / or extreme mechanical loads of the gas engine. Such misfires endanger the safe and reliable operation of the gas engine. Apart from that, a lean mixture is considerably more difficult to ignite than a richer mixture. The requirements for the ignition system of a gas engine, in particular a gas engine operated in a lean mixture, are therefore high.
    In order to meet these requirements, solutions have already become known in which fuel targeted directed towards the spark plug, or at least directed in their vicinity, is blown. This enriches the zone around the spark plug with fuel, creating a richer mixture locally in the spark plug area that can be ignited more safely. Due to the possible variance due to different load points of the gas engine and the local heterogeneous mixture formation, however, a higher demand arises for the control in order to be able to utilize the potential for reducing emissions and reducing soot formation. It makes sense to bring the fuel directly through the spark plug ei nzu.
    For example, in US 6,481,422 B2, gaseous fuel is supplied into the cylinder through the spark plug during the compression stroke and ignited by the spark plug after compression. This is realized by a special spark plug consisting of an adapter which simultaneously forms a first pole of the spark plug (ground) and an inner electrode part which forms the second pole of the spark plug. The adapter is screwed into the thread provided in the cylinder head for conventional spark plugs and the inner electrode part is screwed into the adapter. In the adapter or between the adapter and the inner electrode part, a feed channel is provided, which is connected to a gas valve, and is supplied via the gaseous fuel into the cylinder. By this arrangement, however, results from the feed channel, a large dead space, which is filled during the gas supply with gaseous fuel. After the end of the gas supply, therefore, gaseous fuel remaining in the feed channel can flow uncontrollably into the cylinder, which can disturb the ignition. Likewise, the flame front in the cylinder after ignition can also propagate into the feed channel. After there is a very rich mixture there will be high emissions, which increases the emission of the gas engine. This also leads to a strong formation of soot, which can pollute the feed. Last but not least unburned gaseous fuel can flow into the cylinder, which is discharged in the exhaust stroke directly to the environment, which is also undesirable. Another problem with this arrangement is poor maintainability because the spark plug can not be removed separately from the gas valve. After a spark plug is a service part that must be changed regularly, so any replacement of the spark plug is expensive.
    The US 4,864,989 A shows a spark plug through which gaseous fuel in the space between the inner electrode and outer electrode can be supplied. This space serves as a pre-combustion chamber, in which the gaseous fuel mixes in the compression tract with the compressed mixture in the cylinder and forms an ignitable mixture, which is ignited by the spark plug. The exiting flame jet ignites the mixture in the cylinder.
    On the body of the spark plug, a nozzle is arranged and in the body, a bore is provided, which is connected to the nozzle. A similar arrangement is shown in US 4,383,198 A. Thus, in US 4,864,989 A and in US 4,383,198 A substantially the same problems as in US 6,481,422 B2 occur.
    It is therefore an object of the present invention to provide a spark plug which makes it possible to reduce the above problems.
    This object is achieved in that at least one continuous gas channel is provided by the outer electrode, wherein the gas channel opens inside the cavity and outside in the region of the external thread, wherein between the outer mouth and the axial end of the outer electrode at least one thread is provided. Because the gas channel is provided in the region of the external thread of the spark plug, ie in the region of the axial end of the spark plug, it is possible to largely reduce the dead volume in the spark plug, or more generally the gas feed. There are no long gas lines and large additional cavities in the spark plug necessary to supply the gaseous fuel. Apart from that, this also allows a standard spark plug to be used, into which only the gas duct has to be inserted, for example by simply drilling the gas duct. In this way, a conventional spark plug can be easily converted into a spark plug according to the invention.
    It is advantageous if distributed over the circumference a plurality of gas channels is provided. As a result, the surface of the gas channels can be considerably increased, which leads to a better cooling in the region of the gas channels by the supplied fuel. Thus, a too low flame spread from the combustion chamber into the gas channels can be prevented because a flame would be stifled on the cool surface very quickly and safely.
    It is particularly advantageous if an outer circumferential groove is provided on the outer electrode in the region of the external thread and the at least one gas channel opens into the outer circumferential groove and at least one thread is provided between the outer circumferential groove and the axial end of the outer electrode. The Außenumfangsnut can be used as a simple Gasverteilring that can feed several gas channels, the Außenumfangsnut only requires a supply of gaseous fuel. Therefore, such a spark plug can also be easily used since it is unimportant by the outer peripheral groove in which angular position (relative to a gaseous fuel feed) the spark plug is inserted.
    It is likewise particularly advantageous if the flow cross section of the at least one gas channel is smaller than the flow cross section of the outer circumferential groove. In this way, a throttle effect can be effected by the gas channel, which can develop several effects. On the one hand, the throttling action reduces the backflow of exhaust gas into the outer circumferential groove, in particular during the combustion and subsequent pressure increase in the combustion chamber. On the other hand, the flow rate of the gaseous fuel supplied is increased by the throttling effect, which increases the penetration depth of the gaseous fuel in the combustion chamber and also for higher turbulence in the combustion chamber and thus leads to better cooling by the gaseous fuel .......
    In this context, it is particularly advantageous if the gas channel is aligned internally on the ignition zone of the spark plug. Thus, the gaseous fuel can be introduced specifically where a richer mixture is needed and at the same time the hot ignition zone is optimally cooled by the supplied gaseous fuel.
    If the cavity is enclosed by the outer electrode and in the outer electrode in the region of the axial end at least one continuous flame channel is provided, which connects the cavity with the environment of the outer electrode, can be prevented that the injection of gaseous fuel into the ignition zone of the spark plug Turbulence in the combustion chamber is disturbed. The injected fuel remains concentrated in the ignition zone and effectively fills the ignition zone, thereby enabling safe ignition. The cavity thus forms a kind of mini-chamber.
    Likewise, it is an object of the subject invention to provide a gas engine with such a spark plug and an ignition method, so that a reliable ignition of a gas engine is possible.
    This object is achieved for the gas engine by a spark plug is screwed into a threaded opening according to the invention, and in the combustion chamber head spaced from the threaded opening a Ventilausnehmung is provided, whose axial end is connected via a branch channel with a gas distribution between the spark plug and the combustion chamber head, wherein the Gas distribution ring is formed by an inner circumferential groove on the internal thread and / or by the outer circumferential groove on the spark plug and the at least one gas channel opens into the gas distribution ring, wherein between the gas distribution ring and the axial end of the spark plug at least one thread of the outer and inner thread is provided.
    By the spaced arrangement of the gas valve and the spark plug, it is possible to exchange both components separately and independently, whereby the gas engine is easier to maintain. For maintenance of one of the two components, it is no longer necessary to dismantle both, but only the component that has to be serviced. Apart from that, the ignition system can be easily adapted. For example, another spark plug can be easily used without having to replace the gas valve. Likewise, another gas valve can be used without having to replace the spark plug. In this way, the gas engine can also be easily adapted to different requirements.
    However, the spaced arrangement of the gas valve also makes it possible to arrange the gas valve as close as possible to the gas distribution ring, which reduces the length of the stub line and thus also the dead volume of the gas supply.
    Due to the gas distribution ring, it is irrelevant how the spark plug is screwed into the threaded hole. Through the gas distribution ring, which is connected to the stub, it is always ensured that the gas channels are supplied with gaseous fuel.
    The subject invention will be explained in more detail below with reference to Figures 1 to 6, which show by way of example, schematically and not by way of limitation advantageous embodiments of the invention. It shows
    1 shows a spark plug according to the invention with outer circumferential groove,
    2 shows a section through the spark plug according to the invention without outer circumferential groove,
    Figures 3 and 4, the arrangement of the spark plug in a pre-chamber as the combustion chamber and Figure 5 and 6, the arrangement of the spark plug with shielding in a cylinder as the combustion chamber.
    In Fig. 1 and in Figure 2, a spark plug 1 according to the invention is shown. As is known in a conventional spark plug, the spark plug 1 consists of an outer electrode 2, which is designed as an external thread 5 at one axial end. The outer electrode 2 encloses a center electrode 3, which is separated from the outer electrode 2 by an electrical insulator 4. From the outer electrode 2, which is normally electrically grounded, is also in a known manner from an electrically connected to the outer electrode 2 Zündbügel 6, which is arranged to form the spark gap at the axial end of the spark plug 1 axially opposite the central electrode 3. Between the Zündbügel 6 and the center electrode 3, the spark is formed when a sufficient ignition voltage is applied to the center electrode 3. At the axial end of the spark plug 1, a cavity 7 is formed between the center electrode 3, or the insulator 4 surrounding the center electrode 3, and the outer electrode 2 (to which the igniter 6 also belongs).
    In the region of the external thread 5, a first end of a continuous gas channel 8 opens. The second end of the gas channel 8 opens into the cavity 7. The gas channel 8 thus passes through the outer electrode 2 in the region of the external thread 5 and connects the cavity 7 with the outer peripheral surface the spark plug 1 in the region of the external thread 5. Through the gas channel 8, a gaseous fuel in the cavity 7 can be supplied from the outside. Under gaseous fuel is also understood an ignitable fuel gas mixture or a fuel / air mixture distributed over the circumference of the external thread 5 can also be arranged a plurality of gas channels 8, as indicated in Fig.1 through the mouths.
    Gaseous fuel is also understood to mean an ignitable fuel gas mixture or a fuel / air mixture. As fuel gas, for example, natural gas, LPG or hydrogen is used. With the inventive spark plug 1 even such combustion gases can be safely ignited.
    A circumferential outer circumferential groove 9 (FIG. 1, 4) can be provided on the outer electrode 2 in the region of the external thread 5. Preferably, the outer circumferential groove 9 is closed over the circumference. In this case, the existing gas channels 8 open outside of the spark plug 1 in the outer circumferential groove. 9
    Between the mouths of the existing gas channels 8 and the axial end of the external thread 5 at least one sealing thread 14 of the external thread 5 is provided.
    In Figures 3 and 4, the arrangement of a spark plug 1 according to the invention is shown in a gas engine 20, wherein the Figure 4 shows a detailed view of this arrangement. In this embodiment, the gas engine 20 is provided with a combustion chamber 22 in the form of an antechamber for ignition and a cylinder 40 in which the main combustion takes place. The combustion chamber 22 is connected in a known manner via jet channels 23 with the cylinder 40. The combustor 22 is terminated by a combustor head 21 and the combustor head 21 is disposed in a cylinder head 42 of the gas engine 20 in a known manner. In the combustion chamber head 21, a threaded opening 24 is provided with an internal thread 25. The spark plug 1 is screwed with its external thread 5 in the internal thread 25 of the threaded opening 24, so that the axial end of the spark plug 1 with the Zündbügel 6 and the opposite center electrode 3 projects into the combustion chamber 22. In the region of this axial end, the ignition zone 10 is formed, in which a combustible mixture is ignited in the combustion chamber 22 by spark ignition. After ignition, a jet of hot gas exits through the jet channels 23 into the cylinder 40, which ignites the combustible mixture in the cylinder 40. As is known, with such a prechamber ignition with the same ignition energy, the mixture in the cylinder 40 may be leaner than in the case of direct ignition in the cylinder 40.
    In the combustion chamber head 21 is spaced from the threaded opening 24, and thus also spaced from the spark plug 1, a Ventilausnehmung 31 is provided, in which a gas valve 30 is arranged, with which the gaseous fuel is supplied. The gas valve 30 may be designed as a mechanical valve or as an electronic valve. The valve recess 31 is connected via a branch passage 32 with a gas distribution ring 33. The puncture channel 32 opens into the valve recess 31 in the region of the axial end of the valve recess 31, preferably between an outlet nozzle 34 of the gas valve 30 and the axial end of the valve recess 31. The gas distribution ring 33 is provided between the combustion chamber head 21 and the spark plug 1, in particular between the external thread 5 of the spark plug 1 and the internal thread 25 of the threaded opening 24 of the combustion chamber head 21. In the embodiment shown, the gas distribution ring 33 is formed by the outer circumferential groove 9 on the external thread 5 of the spark plug 1. Similarly, the gas distribution ring 33 could also be formed by an inner circumferential groove on the internal thread 25 of the threaded opening 24. Likewise, an outer circumferential groove 9 and an inner circumferential groove could be provided, which together form the gas distribution ring 33. In the case of an inner circumferential groove, the gas passages 8 are arranged in the spark plug 1 so that the gas passages 8 open into the inner circumferential groove. Likewise, it is also provided in the case of an inner circumferential groove that at least one sealing thread 14 remains between the inner circumferential groove and the axial end of the internal thread 25.
    The Gasverteilring 33 preferably extends over the entire circumference, whereby the spark plug 1 can be screwed arbitrarily into the internal thread 25. The gas distribution ring 33 thus distributes the gaseous fuel supplied via the embroidery channel 32 to the gas channels 8.
    After the gas valve 30 and the spark plug 1 are spaced from each other and arranged separately in the combustion chamber head 21, they can also be removed and replaced separately and independently, which greatly facilitates the maintainability.
    Apart from that, the dead volume of the gas supply can be reduced, since the gas valve 30 can be arranged in the combustion chamber head 21 very close to the spark plug 1 and no long supply lines (such as the branch channel 32) are necessary. The dead volume is limited to the puncture channel 32, the gas distribution ring 33 and the gas channels eighth
    Preferably, a plurality of gas channels 8 are distributed over the circumference of the spark plug 1. Thus, the entire surface of the gas channels 8 cut at the same flow cross-section can be significantly increased. As a rule, after the gaseous fuel is supplied with cooling (in comparison to the combustion temperatures in the combustion chamber 22), an effective cooling of the spark plug 1 in the region of the gas ducts 8 shortly before the ignition or flame propagation time is achieved in the gas ducts 8. By thus achieved low temperature, in the region of the gas channels 8, the risk of flame propagation from the combustion chamber 22 through the gas channels 8 in the Gasverteilring 33 and the puncture channel 32 can be effectively reduced, since flames are still extinguished in the gas channels 8. Such flame propagation could lead to excessive soot formation and contamination in the gas channels 8, the gas distribution ring 33 and the puncture channel 32, which should be avoided.
    In addition, a throttling effect can be achieved by the gas passages 8 if the flow cross section of the gas passages 8 is smaller than the effective flow cross section of the gas valve or of the branch passage 32 or of the gas distribution ring 33, which is normally always the case. The throttling reduces the backflow of exhaust gas into the gas distribution ring 33 or the puncture channel 32, in particular during the combustion and subsequent pressure increase in the combustion chamber 22.
    It can be provided in the spark plug 1, a purge passage 35 (Figure 4), which connects the combustion chamber 22 with the puncture channel 32. The cross section of the flushing channel 35 is designed so that there is a maximum pressure gradient between the purge passage 35 with the higher pressure and the gas distribution ring 33. For this purpose, the flushing channel 35 opens in the combustion chamber 22, preferably in a region in which a high flow velocity prevails. Of course, the pressure must remain smaller than the pressure of the supplied gaseous fuel. Thus, a flushing of the branch channel 32, the gas distribution ring 33 and the gas channels 8 can be achieved during combustion in the combustion chamber 22. During the supply of the gaseous fuel via the gas valve 30, a small amount of gaseous fuel will flow via the purge passage 35 into the combustion chamber 22, which is not disturbing.
    The gas channels 8 are preferably oriented so that the supplied gaseous fuel is directed to the ignition zone 10 in the region between the center electrode 3 and the outer electrode 2 (with a detonator 6). Thus, the spark plug 1 is actively cooled by the low temperatures of the supplied gaseous fuel in the hottest zone around the ignition zone 10. In conjunction with the throttle effect described above, a higher penetration depth or higher local flow rate of the gaseous fuel is further achieved, so that the jet cone of fuel injection directed to the ignition zone 10 higher turbulence and thus more effective cooling in the ignition zone 10 achieved. In this way, the risk of unintentional premature ignition of the combustible mixture due to high temperatures in the region of the ignition zone 10 can be effectively reduced. In particular, the life of the spark plug 1 can be significantly increased by the temperature reduction of the Zündbügels 6 of the outer electrode 2.
    5 and 6 show a further embodiment of the spark plug 1 according to the invention, here in connection with the arrangement of the spark plug 1 in the cylinder head 42 of a cylinder 40 of a gas engine 20. In this case, the cylinder 40 is the combustion chamber 22. In the cylinder 40 is a piston 41 is arranged in a known manner. The combustion chamber head 21 partially closes the combustion chamber 22 in this embodiment. A cooling jacket 43 through which cooling medium flows may also be provided around the combustion chamber head 21 in order to actively cool the combustion chamber head 21. The combustion chamber head 21 is designed essentially as explained with reference to FIGS. 3 and 4. Of course, it would also be possible to arrange the spark plug 1 and the gas valve 30 directly in the cylinder head 42 of the gas engine 20. In this case, the cylinder head 42 would be the combustion chamber head 21 at the same time.
    The spark plug 1 is executed in the illustrated embodiment with an outer electrode 2, the cap 7 surrounds the cavity 7 at the axial end of the spark plug 1 in the form of a shield 12 in the form of a shield. Of course, but could also be a spark plug without shield 12 are used. The cavity 7 is thus delimited by the shield 12 of the outer electrode 2 to the outside. At the axial end of the outer electrode 2, a number of flame channels 11 are provided, which connect the cavity 7 with the space surrounding the spark plug 1, the combustion chamber 22. If a gaseous mixture is ignited in the cavity 7, 11 hot gas jets pass through the flame channels, which ignite the combustible mixture in the combustion chamber 22. Similar to a prechamber ignition, the mixture in the combustion chamber 22 may be leaner than a direct ignition. By shielding the cavity 7 by the outer electrode 2 and too large turbulence in the cavity 7 in the ignition zone 10 is prevented, which also supports the safe ignition.
    In the exemplary embodiment according to FIG. 6, the gas distribution ring 33 is designed as an inner circumferential groove 13 in the region of the internal thread 25 in the combustion chamber head 21.
    Between gas distribution ring 33 and the axial end of the external thread 5 and the internal thread 25 at least one sealing thread 14 is provided in any case, which prevents that, at least not too large, uncontrolled leakage of gaseous fuel through the thread into the combustion chamber 22 is formed. Depending on the pressure level of the supplied gaseous fuel, more than one sealing thread 14 may be required.
    With a spark plug 1 according to the invention, both the main injection of gaseous fuel and a multiple injection of gaseous fuel can be realized.
    The main injection is of particular interest when the spark plug 1 is arranged in a cylinder 40 as a combustion chamber 22. In this case, the gaseous fuel required for the main combustion is supplied via the spark plug 1. Of course, the gaseous fuel needed for the main combustion could also be supplied in other ways, for example in a conventional manner by suction in the suction cycle of the gas engine 20.
    Especially interesting is the spark plug 1 according to the invention but for a Zündeinblasung. For this purpose, immediately before ignition, a required amount of gaseous fuel can be supplied via the spark plug 1 into the ignition zone 10 in order to grease the mixture in the region of the ignition zone 10, which facilitates the ignition. This also makes it possible to supply only a small amount of gaseous fuel first in a first injection, so that such a lean mixture is produced which is not ignitable. Only shortly before the ignition is the mixture enriched by a second injection targeted in the ignition zone 10. In this context, it is also conceivable that a lean mixture is generated in the combustion chamber 22, which would be difficult or impossible to ignite directly by spark ignition. Such a mixture is pressed, for example in the compression stroke from the cylinder 40 into a pre-chamber connected thereto as the combustion chamber 22 or from the cylinder 40 into the cavity of a spark plug 1 according to FIG. Due to the lean mixture, a false or pre-ignition is prevented. Only shortly before the ignition time, gaseous fuel is supplied via the spark plug 1 into the ignition zone 10 of the spark plug 1 in order to deliberately grease the mixture in this area, which makes the ignition by spark ignition easier or even possible.
    权利要求:
    Claims (8)
    [1]
    claims
    A spark plug having an outer electrode (2) and a center electrode (3) separated by an insulator (4), the outer electrode (2) being formed at one axial end of the spark plug (1) as an external thread (5) and a cavity (7) is formed at this axial end between the outer electrode (2) and the middle electrode (3), characterized in that at least one continuous gas channel (8) is provided by the outer electrode (2), the gas channel (8) being provided. inside in the cavity (7) and outside in the region of the external thread (5) opens, wherein between the outer mouth and the axial end of the outer electrode (2) at least one thread (14) of the external thread (5) is provided.
    [2]
    2. Spark plug according to claim 1, characterized in that distributed over the circumference of the external thread (5) a plurality of gas channels (8) are provided.
    [3]
    3. Spark plug according to claim 1 or 2, characterized in that on the outer electrode (2) in the region of the external thread (5) an outer circumferential groove (9) is provided and the at least one gas channel (8) outside in the outer circumferential groove (9) opens and between the outer circumferential groove (9) and the axial end of the outer electrode (2) at least one thread (14) of the external thread (5) is provided.
    [4]
    4. Spark plug according to claim 2 and 3, characterized in that the flow cross section of the at least one gas channel (8) is smaller than the flow cross section of the outer circumferential groove (9).
    [5]
    5. Spark plug according to one of claims 1 to 4, characterized in that the gas channel (8) is aligned inside the ignition zone (10) of the spark plug (1).
    [6]
    6. Spark plug according to one of claims 1 to 5, characterized in that the cavity (7) by the outer electrode (2) is enclosed and in the outer electrode (2) in the region of the axial end at least one continuous flame channel (11) is provided which connects the cavity (7) with the surroundings of the outer electrode (2).
    [7]
    7. Gas engine with a combustion chamber (22) and a combustion chamber head (21) which at least partially closes off the combustion chamber (22), wherein in the combustion chamber head (21) a threaded opening (24) with an internal thread (25) is provided, characterized in that in the threaded opening (24) a spark plug (1) according to one of claims 1 to 6 with the external thread (5) is screwed, and in the combustion chamber head (21) spaced from the threaded opening (24) has a Ventilausnehmung (31) is provided, the axial End via a branch passage (32) with a gas distribution ring (33) between the spark plug (1) and the combustion chamber head (21) is connected, wherein the gas distribution ring (33) by an inner circumferential groove (13) on the internal thread (25) and / or through the Außenumfangnut (9) on the spark plug (1) is formed and that the at least one gas channel (8) opens into the gas distribution ring (33), wherein between the gas distribution ring (33) and the axial end of the spark plug (1) at least one thread (14 ) of the outside en- and internal thread (5, 25) is provided.
    [8]
    8. Gas engine according to claim 7, characterized in that a flushing channel (35) is provided, which connects the combustion chamber (22) with the branch channel (32).
    类似技术:
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    同族专利:
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    WO2017029323A1|2017-02-23|
    DE112016003750A5|2018-05-03|
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    引用文献:
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    法律状态:
    2017-08-15| HA| Change or addition of new inventor|Inventor name: MARTIN KOENCZOEL, AT Effective date: 20170619 Inventor name: GERHARD KOGLER, AT Effective date: 20170619 |
    2021-11-15| HC| Change of the firm name or firm address|Owner name: HOERBIGER WIEN GMBH, AT Effective date: 20211011 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA551/2015A|AT517703B1|2015-08-19|2015-08-19|Spark plug and gas engine with spark plug|ATA551/2015A| AT517703B1|2015-08-19|2015-08-19|Spark plug and gas engine with spark plug|
    PCT/EP2016/069510| WO2017029323A1|2015-08-19|2016-08-17|Spark plug, and gas engine having a spark plug|
    DE112016003750.3T| DE112016003750A5|2015-08-19|2016-08-17|Spark plug and gas engine with spark plug|
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