• 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 (1) for an internal combustion engine, in particular a gas engine, having a center electrode (2) and at least one ground electrode group (3a, 3b, 3c, 3d) each comprising one or more ground electrode plates (3 '), said center electrode (2) comprising at least one center electrode chip (2 ') having a central electrode surface (4a, 4b, 4c, 4d), wherein the central electrode surface (4a, 4b, 4c, 4d) in a range of 0 ° to 50 ° - preferably up to a maximum of 45 ° - transverse to a cross-sectional plane to the longitudinal axis (L) of the spark plug (1), wherein each ground electrode plate (3 ') of a ground electrode group (3a, 3b, 3c, 3d) faces one of the center electrode surface (4a, 4b, 4c, 4d) from the center electrode surface (4a , 4b, 4c, 4d) spaced and substantially parallel to the central electrode surface (4a, 4b, 4c, 4d) extending ground electrode surface (5), wherein a projection of all ground electrode surfaces (5) of the ground electrode plates (3 ') of a Ma 3e, 3b, 3c, 3d) on the middle electrode surface (4a, 4b, 4c, 4d) associated therewith in the direction of a normal vector (N) of the central electrode surface (4a, 4b, 4c, 4d) sum to an imaginary electrode surface (A) wherein the imaginary electrode area (A) has a size of 8 mm 2 to 25 mm 2, wherein each ground electrode area (5) of the ground electrode plates (3 ') of a ground electrode group (3a, 3b, 3c, 3d) ranges from 0.2 mm to 0.8 mm from the at least one central electrode surface (4a, 4b, 4c, 4d) is arranged spaced.
    公开号:AT511866A1
    申请号:T12022011
    申请日:2011-08-22
    公开日:2013-03-15
    发明作者:Markus Kraus；Sean Jenkins
    申请人:Ge Jenbacher Gmbh & Co Ohg；
    IPC主号:
    专利说明:

    1 • · • · · «« ** ** 68440 30 / sk
    The invention relates to a spark plug for an internal combustion engine, in particular a gas engine, comprising a center electrode and at least one ground electrode group, each comprising one or more ground electrode plates, the center electrode having at least one center electrode plate with a center electrode surface, wherein the center electrode surface is in a range of 0 ° to 50 ° preferably up to a maximum of 45 ° - inclined to a cross-sectional plane transverse to the longitudinal axis of the spark plug, each ground electrode pad of a ground electrode group facing the center electrode surface spaced from the central electrode surface and extending substantially parallel to the central electrode surface ground electrode surface, wherein a projection of all ground electrode surfaces of the ground electrode plate of a ground electrode group to their assigned center electrode area in the direction of a normal vector of the center electrode area in summ e gives an imaginary electrode surface, wherein the imaginary electrode surface has a size of 8 mm2 to 25 mm2.
    In modern internal combustion engines, especially in externally ignited, gasoline engine operated gas engines prevail in a combustion chamber high pressures and temperatures, whereby the life of the spark plugs used are severely limited. Especially with highly supercharged internal combustion engines, which often at effective mean pressures > 15 bar operated, it can happen in bad design that a spark plug is only a few hours in the internal combustion engine in use until the ignition voltage is too high due to the rapid electrode burn and the operation must be interrupted to adapt or replace the spark plug.
    In order to keep the service life and cost of the spark plugs for internal combustion engines at a level that is accepted by the customer, it is an effort to increase the life of the spark plug, for example, by increased electrode areas. The electrode surfaces make the reservoir for the burn of the
    * * * * * * * * * * * * ** «« »· · · ·» * * * «« * * »
    For example, US Pat. No. 5,493,171 shows a spark plug with enlarged and essentially radial electrode surfaces, the electrodes for extending the spark plug service life consisting at least partially of titanium diboride. Also, US 5,767,613 shows a spark plug with increased radial electrode surfaces, through which a more efficient and complete combustion of a fuel-air mixture is to be made possible.
    The principal object of a spark plug is to ignite a fuel-air mixture supplied to the electrodes. For this purpose, on the one hand by the ignition system sufficient energy must be made available to allow sparking between the electrodes. On the other hand, the flame kernel must have enough energy so that it does not cool down enough at the electrodes to extinguish it. Therefore, the flammability conditions are much more difficult with large electrode areas than with smaller electrode areas.
    The object of the invention is to provide a comparison with the prior art improved spark plug of the aforementioned type.
    This object is achieved according to the invention in that each ground electrode area of the ground electrode plates of a ground electrode group is arranged in a range of 0.2 mm to 0.8 mm away from the at least one center electrode area.
    The maximum high-voltage strength of a conventional spark plug body is about 40 kV to 45 kV. As a result of the small distance, according to the invention, of the ground electrode areas of the ground electrode plates of a ground electrode group from the center electrode area assigned to the ground electrode areas, an internal combustion engine can already be operated at relatively low ignition voltages of, for example, 8 kV to 20 kV at full load. The life of the spark plug to reach the maximum high voltage strength of the spark plug body due to burnup of the
    Electrode surfaces and thus increased ignition voltages can thus be extended.
    According to a preferred embodiment of the invention, it can be provided that each ground electrode area of the ground electrode platelets of a ground electrode group is arranged at a distance of less than or equal to 0.4 mm from the at least one center electrode area.
    The arrangement of a central electrode surface and the ground electrode surfaces of the ground electrode plates of a ground electrode group assigned to this center electrode surface and extending essentially parallel to the center electrode surface at an angle of maximally 50 ° to a cross sectional plane transverse to the longitudinal axis of the spark plug can also be replaced by short structural lengths of a ground electrode carrier on which the respective ground electrode plates are arranged, and associated short paths from a ground electrode plate to the spark plug body good cooling of the electrodes can be achieved. This is particularly important in applications in internal combustion engines with prechamber.
    Generally, a ground electrode group may comprise exactly one ground electrode plate. However, it can also be provided that a ground electrode group comprises more than one, preferably two, ground electrode platelets.
    In a preferred embodiment, it is provided that the center electrode has a plurality of center electrode plates each having a central electrode surface and the spark plug comprises a plurality of ground electrode groups, wherein each of the ground electrode pads of the ground electrode plates of a ground electrode group of the plurality of ground electrode groups spaced and substantially parallel to a central electrode surface of the plurality of central electrode surfaces are arranged. ····························································································. ........
    In particular, it may be provided that the center electrode has a first center electrode plate with a first center electrode surface and a second center electrode plate with a second center electrode surface and the spark plug comprises a first ground electrode group and a second ground electrode group, wherein the ground electrode surfaces of the ground electrode platelets of the first ground electrode group spaced and substantially parallel are arranged to the first center electrode surface and wherein the ground electrode surfaces of the ground electrode plates of the second ground electrode group are spaced apart and arranged substantially parallel to the second center electrode surface.
    In an advantageous variant, the spark plug has an external thread with a diameter of substantially 18 mm. The external thread may be e.g. to act a metric iso thread M18. Such a spark plug size is typical for stationary gas engines.
    Protection is also desired for an internal combustion engine, in particular a stationary gas engine, with at least one prechamber and at least one main combustion chamber and with at least one spark plug according to one of claims 1 to 7, wherein the at least one spark plug is arranged in the at least one prechamber.
    Further details and advantages of the present invention will be explained with reference to the description of the figures. Show:
    Fig. 1a Fig. 1b Fig. 1c Fig. 1d Fig. 2a and 2b
    Fig. 2c is a perspective view of an embodiment of the proposed spark plug, a plan view of the spark plug of Fig. 1a, a sectional view along section line AA of Fig. 1b, a representation of the electrode surface of the spark plug according to Fig. 1a, perspective views of another embodiment of the proposed Spark plug, a top view of the spark plug of Fig. 2a,
    Fig. 2d Fig. 2e Fig. 3a and 3b Fig. 3c Fig. 3d Fig. 3e Fig. 4a and 4b Fig. 4c Fig. 4d Fig. 4e Fig. 4f Fig. 4g Fig. 5a and 5b Fig. 5c Fig. 5d Fig- 5e, 6a, 6b, 6c, 6d, 6e, 7a, 7c are sectional views along line AA of FIG. 2c, an illustration of an electrode surface of the spark plug according to FIG. 2a, perspective views of a further embodiment of the proposed spark plug, a top view the spark plug of Fig. 3a, a sectional view along section line AA of Fig. 3c, a representation of an electrode surface of the spark plug according to
    Fig. 3a, another embodiment of the proposed spark plug in perspective views, a plan view of the spark plug of Fig. 4a, a sectional view along section line AA of Fig. 4c, a side view of an end portion of the spark plug according to Fig. 4a, a sectional view along section line BB 4a, a further embodiment of the proposed spark plug in perspective views, a plan view of the spark plug of Fig. 5a, a sectional view along section line AA of Fig. 5c, a representation of a Electrode surface of the spark plug according to Fig. 5a, a further embodiment of the proposed spark plug in a perspective view, a side view of the spark plug of Fig. 6a, a plan view of the spark plug of Fig. 6a, a sectional view along section line AA of Fig. 6c, a representation an Elek surface of the spark plug according to
    6a, another embodiment of the proposed spark plug in a perspective view,
    Fig. 7b Fig. 7c Fig. 7d Fig. 7e is a side view of the spark plug of Fig. 7a, a plan view of the spark plug of Fig. 7a, a sectional view along section line AA of Fig. 7c and a representation of an electrode surface of the spark plug of FIG. 7a.
    In the figures described below, some dimensions are given, which are each given in the unit millimeters (mm).
    Fig. 1a shows an embodiment of a proposed spark plug 1 in a perspective view. The spark plug 1 has a cylindrical center electrode 2, wherein the end portion of the center electrode 2 has an inclined end surface 9. On this oblique end face 9, a center electrode plate 2 'is arranged. This center electrode pad 2 'may typically be made of a noble metal or a noble metal alloy and may be connected to the center electrode 2 in a known manner, for example by resistance welding.
    The spark plug 1 also has a typically metallic end portion 7, which typically has an external thread, whereby the spark plug 1 can be screwed into the cylinder head of an internal combustion engine. This external thread arranged on the metallic end region 7 may, for example, be a metric iso thread M18 having a diameter of substantially 18 mm. Such spark plug size is a typical size for stationary gas engines.
    On the front side of the metallic end region 7, a ground electrode carrier 8 is arranged, on which a ground electrode group 3a comprising a ground electrode plate 3 'is arranged. The center electrode plate 2 'and the ground electrode plate 3' of the ground electrode group 3a are arranged facing each other. The center electrode chip 2 'has a center electrode surface 4a in the direction of the ground electrode chip 3', and the ground electrode chip 3 'has a ground electrode surface 5 in the direction of the center electrode chip 2'. Center electrode surface 4a and ground electrode surface 5 are spaced from each other and are substantially parallel to each other. The ground electrode area 5 of the ground electrode plate 3 'of the ground electrode group 3a is spaced 0.35 mm from the center electrode area 4a in this example (see Fig. 1c). The projection of the ground electrode area 5 of the ground electrode plate 3 'in the direction of a normal vector N of the center electrode area 4a results in an imaginary electrode area A having a size of 8.25 mm 2 (see FIG. 1 d).
    Fig. 1b shows a plan view of the spark plug 1 of Fig. 1a. The spark plug 1 has a ground electrode group 3a in the form of a single ground electrode carrier 8, on which a single ground electrode plate 3 '(hidden in this illustration by the ground electrode carrier 8) is arranged. Evident is also the center electrode 2, on whose end-side surface 9 a center electrode plate 2 'is arranged.
    FIG. 1c shows a longitudinal section through an end region of the spark plug 1 according to section line AA of FIG. 1b. The center electrode 2 is surrounded by a usually ceramic insulator 6. At its end region, the center electrode 2 has an oblique end surface 9, which is inclined at an angle of 45 ° to a cross-sectional plane transverse to the longitudinal axis L of the spark plug 1. On this oblique end face 9, a center electrode plate 2 'is attached. The center electrode plate 2 'has a central electrode surface 4a, which is also inclined at an angle of 45 ° to a cross-sectional plane transverse to the longitudinal axis L of the spark plug 1, corresponding to the oblique end surface 9.
    At the metallic end portion 7 of the spark plug 1, a ground electrode group 3a in the form of a ground electrode carrier 8 to which a ground electrode plate 3 'is attached is disposed. In the direction of a normal vector N of the center electrode surface 4a, ground electrode platelets 3 'and center electrode platelets 2' are arranged substantially congruent to one another and have equal sized electrode surfaces (ground electrode surface 5 and center electrode surface 4a). Center electrode surface 4a and ground electrode surface 5 are spaced apart by 0.35 mm and are substantially parallel to each other.
    The projection of the ground electrode surface 5 of the ground electrode plate 3 'onto the center electrode surface 4a in the direction of a normal vector N of the center electrode surface 4a results in an imaginary electrode surface A according to FIG. 1d. According to the dimensions given in millimeters (mm), an imaginary electrode area A of 8.25 mm 2 results.
    Fig. 2a shows a perspective view of another embodiment of the proposed spark plug 1 and Fig. 2b shows another perspective view, wherein for reasons of clarity, the ground electrode groups 3a and 3b and two center electrode plates 2 'have been removed from the illustration. The center electrode 2 of this spark plug 1 has a substantially tetrahedral end region with three end faces 9 arranged in a tetrahedral relationship to one another. Each of the three end faces 9 is inclined by 45 ° to a cross-sectional plane transverse to the longitudinal axis L of the spark plug 1, and at each of the end faces 9, a center electrode chip 2 'is disposed. Each ground electrode group 3a, 3b, 3c is formed in each case by a ground electrode carrier 8, on each of which a ground electrode plate 3 'is arranged.
    Fig. 2c shows a plan view of the spark plug 1 of Fig. 2a and Fig. 2d shows a longitudinal section through an end portion of the spark plug 1 according to section line AA of Fig. 2c. In this example too, the respective center electrode platelet 2 'and the ground electrode pad 3' of a respective ground electrode group 3a, 3b, 3c are arranged relative to one another such that in a viewing direction in accordance with a normal vector N of the respective center electrode area 4a, 4b, 4c the respective center electrode area 4a, 4b, 4c and the ground electrode surface 5 of the ground electrode plate 3 'of their respective associated ground electrode group 3a, 3b, 3c are substantially congruent and have the same contour. For example, the ground electrode area 5 of the ground electrode chip 3 'of the ground electrode group 3a in a viewing direction according to a normal vector N of the center electrode area 4a is substantially congruent with the center electrode area 4a, thus has substantially the same contour and also the same area amount. The center electrode surface 4a of the center electrode chip 2 'and the ground electrode surface 5 of the ground electrode chip 3' of the ground electrode group 3a are facing each other and spaced apart by 0.35 mm and are substantially parallel to each other.
    The same arrangement and orientation of center electrode plates 2 'and ground electrode plates 3' to each other also applies to the ground electrode plate 3 'of the ground electrode group 3b and its associated center electrode plate 2' with the center electrode surface 4b, and to the ground electrode plate 3 'of the ground electrode group 3c and its associated center electrode plate 2 'with the center electrode surface 4c.
    Fig. 2e shows a representation of the imaginary electrode area A resulting, for example, by projecting the ground electrode area 5 of the ground electrode plate 3 'of the ground electrode group 3a onto the center electrode area 4a in the direction of a normal vector N of the center electrode area 4a. Due to the dimensions given in millimeters, an imaginary electrode area A of 11.13 mm 2 results for each of the three projections of respective ground electrode area 5 to respective center electrode area 4 a, 4 b, 4 c.
    Fig. 3a shows a perspective view of a further embodiment of the proposed spark plug 1 and Fig. 3b shows another perspective view, for reasons of clarity, the ground electrode groups 3a, 3b, 3c and three center electrode plate 2 'have been removed from the illustration. 3c shows a plan view of the spark plug 1 of FIG. 3a and FIG. 3d shows a longitudinal section through an end region of the spark plug 1 according to section line AA of FIG. 3c.
    The center electrode 2 of this spark plug 1 has a substantially pyramidal end region with four end surfaces 9 arranged in pyramidal relationship to one another. Each of the four end faces 9 is 45 ° to a 10 °.
    Cross-sectional plane transverse to the longitudinal axis L of the spark plug 1 is inclined and at each of the end faces 9 each have a center electrode plate 2 'is arranged. Each ground electrode group 3a, 3b, 3c, 3d is formed by a respective ground electrode carrier 8, on each of which a ground electrode plate 3 'is arranged. Two mutually associated center electrode platelets 2 'and ground electrode platelets 3' accordingly each have one of the center electrode surfaces 4a, 4b, 4c, 4d and in each case a ground electrode surface 5. The respective ground electrode surface 5 is substantially parallel to the center electrode surface 4a, 4b, 4c assigned to it. 4d and spaced from it by 0.35 mm.
    Overall, in this spark plug 1, four imaginary electrode areas A according to FIG. 3e result, for example, by projecting the ground electrode area 5 of the ground electrode plate 3 'of the ground electrode group 3a onto the center electrode area 4a in the direction of a normal vector N of the center electrode area 4a. The dimensions given in millimeters give in each case an imaginary electrode area A of 8.55 mm 2.
    Fig. 4a shows a perspective view of another embodiment of the proposed spark plug 1 and Fig. 4b shows another perspective view, wherein for reasons of clarity, the ground electrode groups 3a, 3b, 3c and three center electrode plate 2 'have been removed from the illustration. 4c shows a plan view of the spark plug of FIG. 4a and FIG. 4d shows a longitudinal section through an end region of the spark plug 1 according to section line AA of FIG. 4c. 4e shows a side view of an end region of the spark plug 1 according to FIG. 4a, and FIG. 4f shows a cross section through the end region of the spark plug 1 along the section line BB of FIG. 4e. FIG. 4g shows a perspective view of a center electrode plate 2 'of the spark plug 1 according to FIG. 4a.
    The center electrode 2 of this spark plug 1 has a substantially frusto-conical end region with a peripheral circumferential surface which forms an end face 9 of the center electrode 2. The angle between a surface line of the end surface 9 and a cross-sectional plane transverse to the longitudinal axis L of the spark plug 1 is 45 ° (see Fig. 4d). Each of the four ground electrode groups 3a, 3b, 3c, 3d of this spark plug is associated, in each case, with a center electrode plate 2 'integrally formed on the end-side surface 9, corresponding to the frusto-conical configuration of the end face 9. Each ground electrode group 3a, 3b, 3c, 3d is formed by a respective ground electrode carrier 8, on each of which a ground electrode plate 3 'is arranged.
    Also, the ground electrode plates 3 'are shaped according to the frusto-conical configuration of the end face 9, so that in each case a ground electrode surface 5 of the ground electrode plate 3' of a ground electrode group 3a, 3b, 3c, 3d and their associated center electrode surface 4a, 4b, 4c, 4d spaced and substantially parallel to each other, wherein the electrode surfaces in this case are non-planar surfaces. As can be seen from FIGS. 4f and 4d, the mutually facing and curved surfaces of mutually associated center electrode platelets 2 'and ground electrode platelets 3' are spaced apart by 0.35 mm. Each of the four imaginary electrode surfaces A is essentially a sector cutout the center electrode surfaces 4a, 4b, 4c, 4d comprehensive lateral surface of a truncated cone and has a size of 8 mm2 to 25 mm2.
    Fig. 5a and Fig. 5b show two perspective views of another Ausführungsbeispieis the proposed spark plug 1. Fig. 5c shows a plan view of the spark plug 1 of Fig. 5a and Fig. 5d shows a longitudinal section through an end portion of the spark plug 1 according to section line AA Fig. 5c. Fig. 5e shows a representation of the imaginary electrode area A, which results by projecting the ground electrode area 5 of the ground electrode plate 3 'of the ground electrode group 3a onto the center electrode area 4a in the direction of a normal vector N of the center electrode area 4a.
    The metallic end portion 7 of this spark plug 1 has an external thread in the form of a metric iso thread M18 having a diameter of substantially 18 mm. On the front side of the metallic end region 7, a ground electrode carrier 8 is arranged, on which a ground electrode group 3a comprising a ground electrode plate 3 'is arranged.
    The cylindrical center electrode 2 has an end face 9, which is arranged substantially transversely to the longitudinal axis L of the spark plug 1. On this end face 9, a center electrode plate 2 'is arranged, wherein the center electrode plate 2' has a substantially circular center electrode surface 4a, which is arranged substantially transversely to the longitudinal axis L of the spark plug 1. In other words, the angle between the central electrode surface 4a and a cross-sectional plane transverse to the longitudinal axis L of the spark plug 1 is substantially 0 °.
    The center electrode chip 2 'and the ground electrode chip 3' of the ground electrode group 3a are arranged facing each other. The center electrode chip 2 'has the center electrode surface 4a in the direction of the ground electrode chip 3', and the ground electrode chip 3 'has a ground electrode surface 5 in the direction of the center electrode chip 2'. Center electrode surface 4a and ground electrode surface 5 are spaced from each other and are substantially parallel to each other. The ground electrode area 5 of the ground electrode plate 3 'of the ground electrode group 3a is spaced 0.35 mm from the center electrode area 4a in this example (see Fig. 5d).
    The ground electrode surface 5 is substantially circular and has a diameter of 4.8 mm. The center electrode surface 4a is also substantially circular and is slightly smaller than the ground electrode surface 5 with a diameter of 4.5 mm. The projection of the ground electrode surface 5 of the ground electrode plate 3 'on the center electrode surface 4a in the direction of a normal vector N of the center electrode surface 4a thus gives an imaginary one substantially circular electrode surface A with a diameter of 4.5 mm (see Fig. 5d and Fig. 5e). This results in a size of the imaginary electrode area A of 15.9 mm 2 13
    «I l ·« · · «· ·
    Fig. 6a shows a perspective view of another embodiment of the proposed spark plug 1 and Fig. 6b shows a side view of this spark plug 1. Fig. 5c shows a plan view of the spark plug 1 of Fig. 6a and Fig. 6d shows a longitudinal section through an end portion of Spark plug 1 according to section line AA of Fig. 6c.
    This spark plug 1 has two ground electrode carrier 8 arranged essentially inside the metallic end region 7 of the spark plug 1 and substantially flush with the end face of the metallic end region 7. At each ground electrode carrier 8 is in each case a ground electrode plate 3 'is arranged.
    Each of the two ground electrode supports 8 is substantially U-shaped in a plan view (see FIG. 6c). This substantially U-shaped design of the ground electrode carrier 8 in conjunction with relatively large cross sections of the ground electrode carrier 8 allows good heat dissipation of that heat which acts on the ground electrode carrier 8 in the direction of the spark plug main body or of the metallic end region 7 of the spark plug 1.
    In the end region of the center electrode 2 of this spark plug 1, a center electrode carrier 10 is arranged, which in this case has an end face 9 of the center electrode 2. This end face 9 is arranged substantially transversely to the longitudinal axis L of the spark plug. On the end face 9, a center electrode plate 2 'is arranged, whose center electrode surface 4a is also arranged substantially transversely to the longitudinal axis L of the spark plug 1.
    The two ground electrode plates 3 'on the two ground electrode carriers 8 are arranged facing the one center electrode plate 2', whereby a single ground electrode group 3a is formed. Each ground electrode plate 3 'has a ground electrode area 5. The two ground electrode surfaces 5 are arranged facing the center electrode surface 4a in the direction of the longitudinal axis L of the spark plug 1. The ground electrode surfaces 5 • t * 14 of the two ground electrode plates 3 'of the ground electrode group 3a extend substantially parallel to the center electrode surface 4a and are spaced therefrom by 0.35 mm.
    To control and adjust the distances between the center electrode plate 2 'and the ground electrode plate 3' or between the center electrode surface 4a and the two associated ground electrode surfaces 5 7 openings 11 are provided on the lateral surface of the metallic end portion. For a good accessibility of fuel or fuel-air mixture to the disposed within the metallic end portion 7 electrode plate (center electrode plate 2 'and ground electrode plate 3) a plurality of openings 11' are provided on the front side of the metallic end portion 7, by appropriate arrangement and formed in a substantially U-shaped configuration of the ground electrode carrier 8.
    An imaginary electrode area A is always determined per ground electrode group. It results in each case from the areal sum of the projections of all the ground electrode areas of the ground electrode platelets of the relevant ground electrode group to their associated center electrode area in the direction of a normal vector of the center electrode area.
    6e shows the representation of the resulting imaginary electrode area A of the ground electrode group 3a of this spark plug 1. The projection of the two ground electrode areas 5 of the ground electrode platelets 3 'of the ground electrode group 3a onto the center electrode area 4a in the direction of a normal vector N of the center electrode area 4a yields the two projection areas A'. and A ". According to the dimensions of the substantially rectangular ground electrode surfaces 5 given in millimeters, each of the two projection surfaces A 'and A "has a size of 11 mm 2.
    The projections of the two ground electrode areas 5 of the two ground electrode plates 3 'of the ground electrode group 3a onto the "" "... *. * * *. *" "* * * ·» · & & · «« «· ······························. ·· »··» · «· · 15 .............
    Center electrode surface 4a in the direction of a normal vector N of the central electrode surface 4a now sum up the imaginary electrode surface A with a total size of 22 mm2.
    Fig. 7a shows a perspective view of another embodiment of the proposed spark plug 1 and Fig. 7b shows a side view of this spark plug 1 Fig. 7c shows a plan view of the spark plug 1 of Fig. 7a, and Fig. 7d shows a longitudinal section through an end portion of the spark plug 1 according to section line AA of Fig. 7c.
    Like the spark plug 1 according to FIGS. 6a to 6e, the spark plug 1 of this example has two ground electrode carriers 8 arranged substantially inside the metallic end region 7 of the spark plug 1 and substantially flush with the end side of the metallic end region 7. At each ground electrode carrier 8, a ground electrode plate 3 'is again arranged in each case. Each of the two ground electrode supports 8 has a top view in the direction of a spark plug center extending web 12 in a plan view (see Fig. 6c). At their ends facing the two webs 12 are arranged in this example 0.5 mm apart. The two ground electrode carriers 8 in the form of the two webs 12 are in this example made in one piece with the metallic end region 7 (see FIG. 7d).
    The two ground electrode plates 3 'arranged on the two ground electrode carriers 8 constitute, as in the case of the spark plug 1 according to FIGS. 6a to 6e, the only ground electrode group 3a of this spark plug 1, since both earth electrode plates 3' are arranged facing the same center electrode plate 2 'and facing the same.
    The formation of the center electrode 2 with center electrode carrier 10 and center electrode plate 2 'arranged thereon and the arrangement and orientation of the ground electrode surfaces 5 of the ground electrode platelets 3' of the ground electrode group 3a with respect to their assigned *. * * * * 4 4 4 * 4 * · · # · 4 «4 ·« ·· * · «« «4 · *
    Center electrode surface 4a of the single center electrode plate 2 'essentially corresponds to the spark plug 1 according to FIGS. 6a to 6e.
    Corresponding openings 11 for checking and adjusting the electrode spacings on the lateral surface or openings 11 'for improved fuel / air mixture accessibility at the end face of the metallic end region 7 of the spark plug 1 are similar to the spark plug 1 according to FIG 6a to 6e.
    The two projection surfaces A 'and A "formed by the two projections of the ground electrode surfaces 5 of the two ground electrode plates 3' of the ground electrode group 3a on the center electrode surface 4a in the direction of a normal vector N of the center electrode surface 4a, as in the spark plug 1 shown in FIG. 6a to FIG 6e in total the imaginary electrode area A of the ground electrode group 3a with a total size of 22 mm 2 (see FIG. 7e).
    Innsbruck, 19 August 2011
    权利要求:
    Claims (8)
    [1]
    [0005] Claims 1. A spark plug (1) for an internal combustion engine, in particular a gas engine , comprising a center electrode (2) and at least one ground electrode group (3a, 3b, 3c, 3d) each comprising one or more ground electrode plates (3 '), the center electrode (2) comprising at least one center electrode chip (2') having a center electrode surface (4a, 4b, 4c, 4d), wherein the central electrode surface (4a, 4b, 4c, 4d) in a range of 0 ° to 50 ° - preferably up to 45 ° - to a cross-sectional plane transverse to the longitudinal axis (L) of the spark plug (1) wherein each ground electrode plate (3 ') of a ground electrode group (3a, 3b, 3c, 3d) faces one of the center electrode surface (4a, 4b, 4c, 4d) and spaced from the center electrode surface (4a, 4b, 4c, 4d) and Substantially parallel to the central electrode surface (4a, 4b, 4c, 4d) extending ground electrode surface (5) wherein a projection of all the ground electrode areas (5) of the ground electrode plates (3 ') of a ground electrode group (3a, 3b, 3c, 3d) toward their associated center electrode area (4a, 4b, 4c, 4d) in the direction of a normal vector (N) of the center electrode area (4a, 4b, 4c, 4d) yields in total an imaginary electrode surface (A), the imaginary electrode surface (A) having a size of 8 mm 1 to 25 mm 1, characterized in that each ground electrode surface (5) of the ground electrode platelets (3 ' ) of a ground electrode group (3a, 3b, 3c, 3d) is disposed in a range of 0.2 mm to 0.8 mm away from the at least one center electrode surface (4a, 4b, 4c, 4d). A spark plug according to claim 1, characterized in that each ground electrode surface (5) of the ground electrode plates (3 ') of a ground electrode group (3a, 3b, 3c, 3d) is set smaller than or equal to 0.4 mm from the at least one center electrode surface (4a, 4b, 4c , 4d) is arranged at a distance. · ♦ * «« · «f * * * * f · · · · ·« * * * * # *.
    [2]
    2
    [3]
    3. Spark plug according to claim 1 or 2, characterized in that the at least one ground electrode group (3a, 3b, 3c, 3d) comprises exactly one ground electrode plate (3 ').
    [4]
    4. Spark plug according to claim 1 or 2, characterized in that the at least one ground electrode group (3a, 3b, 3c, 3d) comprises more than one, preferably two, ground electrode plates (3).
    [5]
    5. Spark plug according to one of claims 1 to 4, characterized in that the center electrode (2) has a plurality of center electrode plates (2 ') each having a central electrode surface (4a, 4b, 4c, 4d) and the spark plug (1) a plurality of ground electrode groups (3a, 3b, 3c, 3d), wherein in each case the ground electrode surfaces (5) of the ground electrode platelets (3 ') of a ground electrode group (3a, 3b, 3c, 3d) of the plurality of ground electrode groups (3a, 3b, 3c, 3d) spaced and substantially parallel to a central electrode surface (4a, 4b, 4c, 4d) of the plurality of central electrode surfaces (4a, 4b, 4c, 4d) are arranged.
    [6]
    A spark plug according to claim 5, characterized in that the center electrode (2) comprises a first center electrode plate (2 ') having a first center electrode surface (4a) and a second center electrode plate (2') having a second center electrode surface (4b) and the spark plug (5). 1) comprises a first ground electrode group (3a) and a second ground electrode group (3b), wherein the ground electrode surfaces (5) of the ground electrode plates (3 ') of the first ground electrode group (3a) are spaced apart and substantially parallel to the first center electrode surface (4a) the ground electrode surfaces (5) of the ground electrode plates (3 ') of the second ground electrode group (3b) are spaced apart and arranged substantially parallel to the second center electrode surface (4b).
    [7]
    7. Spark plug according to one of claims 1 to 6, characterized in that the spark plug (1) has an external thread with a diameter of substantially 18 mm.
    [8]
    8. Internal combustion engine, in particular stationary gas engine, with at least one prechamber and at least one main combustion chamber and with at least one spark plug (1) according to one of claims 1 to 7, wherein the at least one spark plug (1) is arranged in the at least one prechamber. Innsbruck, 19 August 2011
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    同族专利:
    公开号 | 公开日
    EP2748904A1|2014-07-02|
    WO2013026075A1|2013-02-28|
    AT511866B1|2014-01-15|
    JP2014529850A|2014-11-13|
    EP2748904B1|2014-10-08|
    US20140196684A1|2014-07-17|
    CN103748750A|2014-04-23|
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    DE102009016461A1|2009-04-04|2010-10-07|Man Diesel Se|Ignition arrangement for gas engine utilized e.g., as marine engine, has ignition release device comprising ignition spark-production device that is arranged in pre-chamber for igniting ignition gas jet by ignition spark|EP3173596B1|2015-11-25|2020-04-01|Caterpillar Energy Solutions GmbH|Pre-combustion chamber assembly for internal combustion engines|
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    法律状态:
    2017-04-15| MM01| Lapse because of not paying annual fees|Effective date: 20160822 |
    优先权:
    申请号 | 申请日 | 专利标题
    AT12022011A|AT511866B1|2011-08-22|2011-08-22|SPARK PLUG FOR AN INTERNAL COMBUSTION ENGINE|AT12022011A| AT511866B1|2011-08-22|2011-08-22|SPARK PLUG FOR AN INTERNAL COMBUSTION ENGINE|
    CN201280040708.9A| CN103748750A|2011-08-22|2012-08-17|Spark plug for an internal combustion engine|
    PCT/AT2012/000214| WO2013026075A1|2011-08-22|2012-08-17|Spark plug for an internal combustion engine|
    JP2014526336A| JP2014529850A|2011-08-22|2012-08-17|Spark plug for internal combustion engine|
    EP20120769580| EP2748904B1|2011-08-22|2012-08-17|Spark plug for an internal combustion engine|
    US14/182,749| US20140196684A1|2011-08-22|2014-02-18|Spark plug for an internal combustion engine|
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