510results about "Sparking plugs" patented technology

A support pin of a combustor assembly is provided. The combustor assembly includes a casing of a combustor and an igniter. The igniter includes a main section and a tip from which sparks generated by the igniter within the main section are ejected. The support pin includes an exterior section, a main body and a tip section. The exterior section is connectable to the casing. The igniter is affixable to the exterior section. The main body is integrally formed with the exterior section and is disposable to surround the main section of the igniter. The main body has a first wall thickness and defines support pin holes. The tip section is integrally formed with the main body and is disposable to surround the tip of the igniter. The tip section has a second wall thickness. The second wall thickness exceeds the first wall thickness.

The invention discloses a gas spark switch coating electrode and a preparation method and application thereof, and belongs to the technical field of high-power pulse. The gas spark switch coating electrode comprises a gas spark switch metal electrode substrate and a surface composite graphite coating, the preparation method comprises the following steps: (1) performing injection on the surface of the gas spark switch metal electrode substrate to form the superficial nanometer strengthening layer; and (2) sequentially depositing an intermediate transition layer, an in-situ gradient growth composite layer and a titanium-doped graphite-like layer on the surface of the superficial nanometer strengthening layer, and periodically and repeatedly depositing to obtain the titanium-doped graphite-like composite layer. The gas spark switch coating electrode has excellent conductivity, ablation resistance and strong interface bonding performance, and can obtain an effective thickness of 10-20 [mu] m by regulating and controlling cycle repetition times, so that the gas spark switch coating electrode can show uniform ablation morphology and relatively low ablation loss under high-power, high-voltage and large-current breakdown test conditions; and a long-service-life electrode solution is provided for a high-pulse power device.

To provide a spark plug for an internal combustion engine capable of suppressing preignition.SOLUTION: In a spark plug 1, a packing 5 is held in a plug axis direction Z between a housing opposite face 22 and an insulator opposite face 32 which are opposed to each other. An insulator 3 includes a tapered distal end portion 31. The spark plug 1 includes a pocket part 7 which is an annular space formed between an outer peripheral surface 311 of the tapered distal end portion 31 and an inner peripheral surface of a housing 2. A distal end of the insulator 3 is disposed at the same position as a distal end of the housing 2 or a position closer to a proximal end side Z2 than the distal end of the housing 2 in the plug axis direction Z. The distal end portion of the housing 2 includes an inner protrusion 21. The housing opposite face 22 is formed in a proximal end portion of the inner protrusion 21. The pocket part 7 is formed between the outer peripheral surface 311 of the tapered distal end portion 31 and an inner peripheral surface 211 of the inner protrusion 21.SELECTED DRAWING: Figure 2

The purpose of the present invention is to provide a spark plug (10) configured so that a gasket (24) will not catch on a threaded part (16). This spark plug comprises: a main metal fitting (15) disposed on the outer periphery of an insulator (11) and extending along a center line (C) from the distal end to the proximal end; and a gasket positioned on the outer periphery of the main metal fitting. The main metal fitting includes: a threaded part (16) composed of a male thread centered on a center line; a head part (18) including a seat surface (17) provided toward the proximal end of the threaded part; and a neck part (19) disposed between the head part and the screw part. The neck part includes a flange part (20) protruding radially outward. The gasket is positioned between the head part and the flange part. An outer diameter (D3) of the flange part is lesser than an outer diameter (D2) of the threaded part, but larger than the minimum value of an inner diameter (D6) of the gasket.

Spark plug (1) for a hydrogen-powered internal combustion engine with a longitudinal axis X, comprising • a housing (2), • an insulator (3) arranged within the housing (2) • a central electrode (4) arranged within the insulator (3), • a ground electrode (5), • an ignition gap formed between the ground electrode (5) and the center electrode (4) within the housing, the housing having two opposite bores in which the ground electrode is arranged.

SOLUTION: A spark plug (1) having a longitudinal axis X, comprising: a housing (2) having a longitudinal bore parallel to the longitudinal axis X of the spark plug (1), whereby the housing (2) has a housing wall (20) and an internal space (21); an insulator (3) disposed inside the housing (2); a center electrode (4) disposed inside the insulator (3); and an overall length L MaEI and D MaEI a ground electrode (5) having a diameter of D Bohr The hole (50) in the housing wall (20) has a diameter of 1.5 mm, and the ground electrode (5) has a length L Bohr The ground electrode (5) is disposed in the hole (50) with a length L em The housing wall (20) projects from the inner surface (20a) of the housing wall (20) into the interior space (21) of the housing (2) with a thickness D Wall and a spark gap (45) formed between the ground electrode (5) and the center electrode (4), and a length L of the ground electrode (5) in the hole (50). Bohr The total length L of the ground electrode (5) MaEI is greater than or equal to 1.8 and less than or equal to 2.2, and / or the thickness L of the housing wall (20) Wall The length L of the ground electrode (5) projecting into the internal space (21) of the housing (2) relative to the em The ratio is greater than or equal to 0.2 and less than or equal to 3, and the length or thickness extends perpendicular to the major axis X of the spark plug (1).

The utility model discloses a sparking plug convenient to install, which relates to the technical field of sparking plugs and comprises a sparking plug and an installation cylinder, the bottom end of the sparking plug is inserted into the installation cylinder, an outer sleeve is installed on the outer side of the lower portion of the sparking plug, a jacking mechanism is installed on the lower portion of the outer side of the installation cylinder, and arc-shaped grooves are installed on the periphery of the interior of the installation cylinder. Inserting rods are installed on the periphery of the bottom end of the spark plug and installed in the inserting groove in a sliding mode. According to the utility model, the cremation plug is installed inside the installation cylinder, at the moment, the insertion rod at the bottom end of the cremation plug is inserted into the arc-shaped groove inside the installation cylinder, and after the insertion rod is inserted into the bottom end, the spark plug is jacked upwards through rotation, external force removal and the jacking mechanism, so that the spark plug can be assembled and disassembled according to the reverse operation. And the spark plug can be quickly mounted and dismounted.

To provide a spark plug that can extend time until a fusion part is exposed.SOLUTION: In a cross section of an electrode including an axial line and a center of gravity of a discharge surface of a chip in a spark plug, when the length in a direction orthogonal to the axial line of the discharge surface is D, the length of a line obtained by cutting the axial line by a border of the chip is L1, the length of a line whose distance from the axial line is D / 4 and that is obtained by cutting a first line parallel to the axial line by the border of the chip is L2, and the length of a line whose distance from the axial line is 3D / 8 and that is obtained by cutting a second line parallel to the axial line by the border of the chip is L3, the relation of L1<L2<L3 is satisfied.SELECTED DRAWING: Figure 2

The utility model relates to the technical field of spark plug detection, in particular to a spark plug detection device which comprises a base, a detection frame is fixedly connected to the right side of the top of the base, a transmission case is fixedly connected to the right side of the detection frame, and a visual camera is fixedly connected to the top of the detection frame. A limiting seat is fixedly connected to the middle of the top of the base, a connecting seat is arranged on the left side of the limiting seat, a control table is fixedly connected to the middle of the front side of the base, an inserting mechanism is arranged on the left side of the base, and a position correcting mechanism is arranged in the transmission box. According to the utility model, plug-in power supply and rotation correction of the spark plug are realized, and the convenience and high efficiency of the device are improved.

The invention discloses an ignition device for a zero-low-carbon engine, the engine and operation equipment, and the ignition device comprises a spark plug which is provided with an ignition structure; a protection cavity is formed in the protection cover, the protection cover is connected to the spark plug, the ignition structure is contained in the protection cavity, the protection cover is provided with an ignition opening, and the protection cavity is communicated with the external space of the protection cover through the ignition opening. According to the ignition device for the zero-low-carbon engine, the protective cover is arranged to protect the ignition structure of the sparking plug, so that the airflow state near the ignition structure is relatively stable, and disturbance of a combustible mixture formed by fuel and air to the ignition structure can be reduced; the ignition device can accurately and reliably control the ignition time, and safe operation of an engine is guaranteed.

In certain embodiments, a significant improvement in H2-ICE performance can be achieved by a combination of active scavenging pre-combustion chamber technology and predictive model-based spark control to overcome the drawbacks of known combustion technologies. In certain embodiments, advanced combustion modeling and simulation of the ignition process, including spark events, arc movement and elongation, and resulting flame propagation, can be used to predict the relationship between spark energy / output, flow within the electrode gap, and flame growth (SOC) for different engines, different spark plugs, and various conditions. This information can be used to adjust the spark energy / output characteristics during the spark event of the same cycle in order to minimize SOC variations and significantly reduce the tendency of combustion anomalies such as backfire, knocking, and pre-ignition that prevent the achievement of high engine output density and efficiency.

The utility model relates to the technical field of side electrode spark plugs, in particular to a semi-edge surface multi-side electrode spark plug which comprises a threaded sleeve seat, a central electrode is arranged in the center of the top of the threaded sleeve seat, one side of the top of the threaded sleeve seat is fixedly connected with an arc-shaped side cover, and the top end of the arc-shaped side cover is fixedly connected with an arc-shaped top cover. The top end of the inner wall of the arc-shaped side cover is fixedly connected with an installation arc seat, and the bottom of the installation arc seat is provided with an arc-shaped multi-side electrode. According to the semi-edge surface multi-side electrode ignition device, the threaded sleeve seat, the central electrode, the arc-shaped side cover, the arc-shaped top cover, the mounting arc seat, the arc-shaped multi-side electrode, the screw cap and the electrifying sleeve seat are arranged, so that the semi-edge surface multi-side electrode ignition operation can be more accurately and stably performed by equipment; a worker firstly carries out fixed installation operation on the whole equipment needing to be used through a threaded sleeve seat, so that a central electrode at one end, an arc-shaped side cover and an arc-shaped top cover are screwed and installed at an electric ignition position of an engine.

To restrain blow-out of electric discharge at the time of ignition.SOLUTION: An internal combustion engine comprises: an ignition plug having a center electrode and a ground electrode faced to a combustion chamber, and arranged between an intake value and an exhaust valve; and a cylinder injection valve arranged on an intake valve side to the ignition plug and injecting fuel to the combustion chamber, wherein the ground electrode and the center electrode form a discharge gap opposite to an axial direction of the ignition plug. The internal combustion engine comprises a wall part provided between the center electrode and the cylinder injection valve inside the combustion engine, and extending to a predetermined position from a ceiling side of the combustion chamber along the axial direction of the ignition plug. The predetermined position is included in a range between a tip position of the center electrode and a bottom position of the ground electrode in the axial direction of the ignition plug, and the ignition plug is arranged so that a base end of the ground electrode is positioned on an exhaust valve side to the center electrode.SELECTED DRAWING: Figure 3

A spark plug (38) includes: a spark plug housing (40); a cathode (62) including at least one electrode fork (64) and formed primarily of iridium; and an anode (72) formed at least predominantly of iron or steel. The material composition of the cathode and anode provides extended spark plug service life, especially in high power density applications employing pre-chamber spark plugs. Related methods are also disclosed.

Disclosed is a spark plug (1) having a longitudinal axis and comprising: • a housing (2) having a bore along the spark plug longitudinal axis and an end face (27) facing the combustion chamber; • an insulator (3) that is located at least in part within the housing (2), the insulator having an insulator base that extends from an insulator (3) end face facing the combustion chamber to an insulator base neck; • a central electrode (4) located at least in part within the insulator (3); and • at least one ground electrode (5) on the housing (2), the at least one ground electrode (5) and the central electrode (4) being arranged in such a way that the at least one ground electrode (5) forms a spark gap (54) along with the central electrode (4), a width of said spark gap (54) being defined by an inter-electrode distance between the central electrode (4) and the at least one ground electrode (5); • the inter-electrode distance between the central electrode (4) and the at least one ground electrode (5) is not greater than 0.4 mm, and the spark gap (54) is formed at least in part within the housing (2).

A gasket (20) configured to be positioned between a spark plug and a cylinder head of an internal combustion engine when a threaded section of the spark plug is screwed to the cylinder head. The gasket includes an annular body (23) and projections (25). The annular body is arranged around a threaded relief section of the spark plug where no threads are formed near the threaded section. Each of the projections extends radially inward from the annular body.The annular body, the thread relief section and the threaded section are shaped such that they satisfy a relationship of φb mm ≤ φa mm ≤ φc mm - 0.9 mm, where φa is an inner diameter of a circle (S1) defined to extend along the inner surfaces of the projecting ends (26a) of the inclined sections and centered on an annular center point (Cp) of the annular body, φb is the outer diameter of the thread relief section and φc is the nominal thread diameter of the threaded section.

The invention relates to the technical field of electric spark igniters, in particular to a micro-motion type gasoline engine electric spark igniter and a using method thereof.The micro-motion type gasoline engine electric spark igniter comprises a fixing sleeve and a threaded rotating rod rotationally arranged in the fixing sleeve, the end, extending to the upper side of the fixing sleeve, of the threaded rotating rod is fixedly connected with a check block, and the bottom end of the threaded rotating rod is fixedly connected with a lifting insertion block; a spark plug body is installed in the lifting insertion block, and an upper pole piece and a lower pole piece are arranged at the bottom end of the spark plug body. According to the micro-motion type gasoline engine electric spark igniter, due to the arrangement of the disassembling and assembling mechanism, when the spark plug body is disassembled and assembled, only the balancing weight needs to be pulled and rotated, disassembling and assembling are rapid and convenient, workers do not need to stretch into the spark plug body to disassemble the spark plug body, and efficiency is improved; and if the butt joint of the lower pole piece and the upper pole piece is seriously corroded, the discharging part of the lower pole piece can be automatically replaced, and during subsequent maintenance, a worker can quickly confirm the use condition of each spark plug body.

The present invention discloses an automotive ignition coil and its ignition controller, and the technical solution is as follows: An energy storage module is arranged on the main housing, and the energy storage module is electrically connected in parallel with the primary coil. When the primary coil is connected to a DC power supply, the energy storage module and the primary coil respectively store electric field energy and magnetic field energy synchronously. There is an inversion circuit electrically connected between the energy storage module and the primary coil. When the inversion circuit responds to the disconnection of the DC power supply and the primary coil, it connects the energy storage module and the primary coil to provide a reverse voltage that is reversely transmitted to the primary coil, and the magnitude of the reverse voltage is equal to the self-inductive voltage generated by the primary coil. Through energy storage components, the present invention realizes that when the coil is powered off, the self-inductive voltage generated by the inductance is offset by the reverse current voltage, thereby achieving the effect of quickly eliminating the magnetic field, realizing the instantaneous disappearance of the magnetic field in the primary coil, demagnetizing the iron core, and the magnetic force lines rapidly contracting and cutting the secondary coil to generate high voltage for ignition operation.

Spark plug for a spark-ignition engine. Spark plug (10) for a spark-ignition engine comprising: - a first electrode (1), - a second electrode (2), - a third electrode (13), - a fourth electrode (23), - a first inter-electrode gap (14) located between the first electrode (1) and the third electrode (13), - a second inter-electrode gap (24) located between the second electrode (2) and the fourth electrode (23), and - a base (8), particularly in the lower part of the spark plug, the third and fourth electrodes (13, 23) forming part of the base (8). Figure for the abbreviation: 1

The utility model discloses a natural gas engine cylinder cover spark plug sheath structure which comprises a cylinder cover, the cylinder cover is composed of a cylinder cover bottom plate, a spark plug installation boss and an installation hole, the natural gas engine cylinder cover spark plug sheath structure further comprises a spark plug, a sealing washer, a spark plug sheath and a water jacket, and the cylinder cover bottom plate and the spark plug installation boss are integrally formed and cast. The mounting hole is composed of a threaded part and an unthreaded hole part, the spark plug is connected with the spark plug sheath, the spark plug is in threaded connection with the mounting hole, and the spark plug sheath is connected with the mounting hole through the sealing washer. The cylinder cover bottom plate and the spark plug installation boss are integrally formed and cast and are made of vermicular iron, the heat conduction capacity and the ductility are high, heat of the cylinder cover bottom plate can be rapidly conducted out and taken away through cooling water, the temperature of the cylinder cover bottom plate is lowered, and the high-temperature cracking fault is reduced.

A protection device against pulsed currents intended to transmit signals having frequencies lying in a transmission frequency band. The protection device has a signal conduction path and a shielding disposed around the signal conduction path. The signal conduction path has two spark gaps mounted in series and an inductor element linking a portion of the signal conduction path situated between the spark gaps. The inductor element is linked to the shielding. The protection device is configured as a high-pass filter allowing passage over the signal conduction path of the signals having frequencies lying within the transmission frequency band.

A spark plug (1) with a longitudinal axis X, having: - a housing (2) with a longitudinal bore, as a result of which the housing (2) has a housing wall (20) with an inner face (21), - an insulator (3), which is arranged within the housing (2) and has a combustion chamber-side insulator tip (30) which is flush with a plane E1 extending perpendicular to the longitudinal axis X, - a centre electrode (4), which is arranged at least partially within the insulator (3), and - an earth electrode (5), which is arranged within the housing (2), the earth electrode (5) and the centre electrode (4) being arranged such that they form a spark gap (55) and the spark gap (55) is within the housing (2), wherein the housing (2) has, at its combustion chamber-side end, a first inside diameter D1 and, within the housing (2) in the plane E1, a second inside diameter D2, the first diameter D1 being greater than the second diameter D2, so that a breathing space (50) formed within the housing (2) tapers from its combustion chamber-side end (51) to its combustion chamber-remote end (52).

To provide a spark plug capable of reducing the overheating of a ground electrode.SOLUTION: A spark plug includes: a metal shell that has a cylindrical tip extending along an axis toward a tip side and that is provided with a through hole penetrating in a direction that intersects the axis, at the tip; and a ground electrode having a fixing portion disposed in the through hole. The through hole includes a counterbore portion and a penetrating portion that is connected to the counterbore portion and that extends to an inner circumferential surface of the tip. The fixing portion includes a first portion disposed in the counterbore portion and a second portion that is disposed in the penetrating portion and that is thinner than the first portion. There is a first gap between the first portion and an edge of the penetrating portion connected to the counterbore portion.SELECTED DRAWING: Figure 2

The utility model discloses a spark plug and an internal combustion engine, and belongs to the technical field of spark plugs. The spark plug comprises a shell, a pipe assembly and an electrode assembly. The shell is provided with an accommodating cavity; the pipeline assembly comprises an air inlet pipe and an air outlet pipe. The containing cavity communicates with the air inlet pipe and the air outlet pipe. The electrode assembly is arranged in the containing cavity and comprises a first electrode and a second electrode, a through hole is formed in the second electrode, an internal thread is arranged on the hole wall of the through hole, the first electrode penetrates through the through hole, an external thread is arranged on the circumferential wall of the first electrode, and the rotating direction of the external thread is opposite to that of the internal thread; or, the hole wall of the through hole is provided with a plurality of convex parts which are arranged in an array, and the first electrode is arranged in the through hole in a penetrating manner. According to the spark plug provided by the invention, the number of the discharge points is multiplied, so that the probability of failure of the ignition function of the spark plug is reduced, the service life of the spark plug is prolonged, and the maintenance or replacement cost of the spark plug is reduced.

A spark plug includes a center electrode extending along an axial line, a metal shell holding the center electrode in an insulated manner, and a ground electrode connected to the metal shell by a connection portion. At least one of the center electrode and the ground electrode includes a protrusion. A discharge member joined to the protrusion via a fused portion forms a spark gap between the discharge member and the other one of the electrodes. A recess is formed at a position including the protrusion.

Spark plug (10), having: a point (26, 46) extending in a first direction from a rear end to a front end; and an electrode base metal (22, 41) with an extension section (23, 43) extending in the first direction, the front end section of which is connected to a rear end section of the tip (26, 46) by a melt zone (25, 45, 71), wherein in a section taken along the first direction and containing a central axis (C) of the tip (26, 46) extending in the first direction, A and B satisfy a comparison expression B / A ≥ 1,2, wherein in a case where two ends (51, 52, 61, 62, 72, 73) of a line indicating an interface (50, 60, 72) between the extension section (23, 43) and the melting zone (25, 45, 71) are arranged at the same position with respect to the first direction, A is a linear distance between the two ends, or, In a case where one of the two ends (51, 52, 61, 62, 72, 73) is positioned in front of the other end with respect to the first direction, A is a distance on a straight line (55, 67, 83) passing through one end and extending perpendicularly to the central axis (C), from one end to an intersection point (56, 84) between the straight line (55, 83) and an outline (25a, 71a) of the melting zone (25, 71) on one side towards the other end, B is the length of the line that indicates the interface, wherein the line indicating the boundary surface (50, 60, 72) has at least one projection (53, 63, 65, 75, 77, 79, 81) that projects towards the front end face, and wherein a first vertex (54, 64, 76) located furthest forward below the vertices of the projections (53, 63, 65, 75, 77, 79, 81) is present in a first region (58, 68) of the line indicating the interface (50, 60, 72), the first region being arranged in the direction of one end with respect to the central axis (C), or in a second region (59, 69) of the line indicating the interface (50, 60, 72), the second region being arranged in the direction of the other end with respect to the central axis (C).

A spark plug (1) includes a tubular insulator (50). The insulator contains alumina as a primary component, and further contains a secondary component. The secondary component contains a silicon (Si) component, a magnesium (Mg) component, a barium (Ba) component, a calcium (Ca) component, and a rare earth component. The amounts (mass %) of these components as reduced to oxide and relative to the total mass of the secondary component satisfy specific conditions.

Spark plug (10; 70; 90; 110), comprising: an insulator (11) having an axial hole (12) formed therein in the direction of an axis (O) of the spark plug (10; 70; 90; 110;); a center electrode (20) arranged in a front end side of the axial hole (12); a cylindrical metal housing (30) which holds the insulator (11); and a ground electrode (40; 71; 91) comprising a rod-shaped ground electrode base (41; 72; 92) formed of a Ni-based material and coupled to the metal case (30) at a base end portion (43) thereof, and a ground electrode tip (53) made of a noble metal-based material and attached to a distal end portion (42) of the ground electrode base (41; 72; 92), wherein the distal end portion (42) of the ground electrode base (41; 72; 92) includes: a first surface (44; 74; 93) opposite a front end surface (26) of the center electrode (20); and second and third surfaces (47, 50; 75, 77; 95, 96) connected to the first surface (44; 74; 93) and extending from the distal end portion (42) to the base end portion (43) of the ground electrode base (41; 72; 92), wherein the ground electrode tip (53) comprises: a first tip element (54; 79; 99) attached to the first surface (44; 74; 93) and having a first discharge surface (55; 80; 100) to allow spark discharge between the center electrode (20) and the first discharge surface (55; 80; 100); and a second tip element (56; 81; 101) attached to at least one of the second and third surfaces (47, 50; 75, 77; 95, 96) and having a second discharge surface (57; 82; 102) to allow spark discharge between the center electrode (20) and the second discharge surface (57; 82; 102), wherein the first tip element (54; 79; 99) and the second tip element (56; 81; 101) are spaced apart from each other, and wherein a volume of the second tip element (56; 81; 101) is greater than a volume of the first tip element (54; 79; 99).

One spark plug (100), with: a center electrode (20) extending in a direction of an axis (AX) and having a first discharge surface (20S); an insulating member (10) having an axial bore (12) extending in the direction of the axis (AX) and having a front end portion at which the center electrode (20) is arranged; a metal sleeve (2, 2B) having a cylindrical shape and arranged radially outside the insulating element (10); a ground electrode (30, 30B) having a second discharge surface (30S) opposite the first discharge surface (20S) in the direction of the axis (AX) and forming a gap (G) between the first discharge surface (20S) and the second discharge surface (30S), wherein the metal sleeve (2, 2B) and the ground electrode (30, 30B) are electrically and mechanically connected to each other; and a cover (90, 90B) connected to a front end portion (61) of the metal sleeve (2, 2B) and covering an opening of the metal sleeve (2, 2B) on the front end side for defining an additional combustion chamber (BS) in which the gap (G) is arranged, wherein the cover (90, 90B) has at least one through-hole (95a-95d) connecting the additional combustion chamber (BS) to the outside area, wherein a first line (L1), a special point (SP), a first tangent line (C1a-C1d), a second tangent line (C2a-C2d) and a second line (L2a-L2d) are defined in a section (CF1, CF2) containing a center of gravity of an opening of a special through-hole (95a-95d) of the at least one through-hole (95a-95d) on the side of the additional combustion chamber (BS) and the axis (AX), wherein the first line (L1) passes through a center point (MP) of a region which is perpendicular to the axis (AX) and in which the first discharge surface (20S) and the second discharge surface (30S) are present, and is parallel to the axis (AX), the special point (SP) is a midpoint of a line (LS) connecting an intersection point (XP1) between the first line (L1) and the first discharge surface (20S) with an intersection point (XP2) between the first line (L1) and the second discharge surface (30S), the first tangent line (C1a-C1d) is a half-line extending from the special point (SP) and is tangent to the center electrode (20) on the side of the special through-hole (95a-95d) of the first line (L1), the second tangent line (C2a-C2d) is a half-line extending from the special point (SP) and is tangent to the ground electrode (30, 30B) on the side of the special through-hole (95a-95d) of the first line (L1), the second line (L2a-L2d) is a half-line extending to the side of the special through-hole (95a-95d) of the first line (L1) and perpendicular to the axis (AX), a first angle (Aa-Ad) is formed by the second line (L2a-L2d) and the first tangent line (C1a-C1d), a second angle (Ba-Bd) is formed by the second line (L2a-L2d) and the second tangent line (C2a-C2d), where the second angle (Ba-Bd) is greater than the first angle (Aa-Ad), and at least one area of ​​the opening (95ao-95do) of the special through-bore (95a-95d) on the side of the additional combustion chamber (BS) lies within the second angle (Ba-Bd).

The invention provides a multi-mode ignition spark plug, a hydrogen engine ignition method and a related device, and relates to the field of engines, the multi-mode ignition spark plug comprises a first electrode and a second electrode; the first electrode is used for being matched with a ground level structure in the preheating chamber to achieve ignition, and the second electrode is used for being matched with a central electrode hole in the pre-combustion chamber to achieve ignition. The two ignition modes of ignition inside the pre-combustion chamber and ignition outside the pre-combustion chamber can be achieved only through one spark plug, and the cost of the engine and the complexity of the wiring environment of the engine are reduced.