Abstract: A system composed of a water sleeve and a spark plug for an internal combustion engine. The spark plug has a supply passage, a center conductor, an insulator surrounding the center conductor, and a metallic body surrounding the insulator. A center electrode and at least one ground electrode form a spark air gap. In the region of its front end, the spark plug has an external thread for screwing the spark plug into a component of the internal combustion engine and has at least one discharge opening of the supply passage. The spark plug, at its front end, has, attached to the body, a sleeve that contains the external thread; the body has, on its outside, at least one groove that forms a section of the supply passage; and the sleeve has a heat conducting section that contains at least a part of the external thread and that is in contact with the body and covers at least portions of the groove.

Abstract: A spark plug ignition tip for an electrode of a spark plug device, in particular a prechamber spark plug, having a base body that has a first axial end, a second axial end and a circumferential section situated between them; the base body contains a precious metal or precious metal alloy; the first axial end and/or the circumferential section is embodied for fastening the base body to an electrode; the second axial end has a dome-shaped section; and the base body is produced by powder metallurgy.

Abstract: A spark plug device that includes a spark plug and a sealing ring, and a method for producing the same. The spark plug may include a body, an insulator, a center electrode, and a ground electrode. The sealing ring is secured to the body in a captive fashion. A fastening section of the body has an outer diameter that is greater than an inner diameter of the sealing ring, which has been reshaped from a flat sealing ring blank into a conical sealing ring.

Abstract: A method for producing an electrode device for a spark plug, with the following steps: preparation of an electrode body composed of a first material, the electrode body having a first joining surface; preparation of a precious metal part, which has a second joining surface; placement of the joining surfaces against each other and production of a relative movement between the joining surfaces during which the joining surfaces are pressed against each other with a first force (F1) that is less than a force threshold (FS); termination of the relative movement and pressing of the joining surfaces against each other for a pressing period (TA) with a second force (F2) that is greater than the force threshold (FS) in such a way that a diffusion from the first and/or second material beyond the joining surfaces takes place; and termination of the pressing together, wherein the relative movement is a linear movement and/or an orbital movement.

Abstract: A spark plug and a method for manufacturing a spark plug. The spark plug has a retaining mechanism holding the insulator in the body in a positive manner, by means of which the insulator is pressed against the seal seat in the longitudinal direction with a preloading force (Fv) in order to seal the passage against the flow of combustion gases through it. A positive-acting securing mechanism that at least partially overlaps the side of the retaining mechanism facing away from the front end is placed on, and attached to, the body. Provision is made so that the insulator projects beyond the side of the securing mechanism facing away from the front end, wherein the securing mechanism overlaps the retaining mechanism, forming a gap with the retaining mechanism and forming a gap with the insulator.

Abstract: A prechamber spark plug for a gas-powered internal combustion engine, having a metallic body, an insulator, a center electrode, at least one ground electrode, a cap, and a sleeve. The cap is arranged at a front end of the spark plug and shields the center and ground electrodes from a combustion chamber after the prechamber spark plug is installed in the internal combustion engine, and the cap delimits a prechamber in which the center electrode and the ground electrode are located from the combustion chamber. The cap has at least one opening that permits gas exchange between the prechamber and the space outside of the prechamber. The cap is mounted on the sleeve, which surrounds a section of the body, contains external threads for screwing into the internal combustion engine, and is joined to the body. In addition, a method for manufacturing the aforementioned spark plug is described.

Abstract: A spark plug having a center conductor, an insulator surrounding the center conductor, at least two electrodes forming a spark gap, and a spark plug body surrounding the insulator and having an external thread arranged at the front end of the spark plug for screwing in to an internal combustion engine. A component that is attached to the front end of the spark plug and comes into contact with fuel during operation is formed as a sintered powder injection molded part, referred to as a MIM component.

Abstract: A spark plug having a center conductor, an insulator surrounding the center conductor, a body surrounding the insulator, and a center electrode connected in an electrically conductive manner to the center conductor, wherein the center electrode delimits a spark gap with its front face. The spark plug has two bar-shaped ground electrodes that are connected in an electrically conductive manner to the body, that delimit the spark gap, and that are adjacent to one another and spaced apart from one another in the region of the spark gap.

Abstract: A method for producing a spark plug for internal combustion engines, in particular for gas-powered internal combustion engines, having a metallic shell, a ceramic insulator held in the shell, a center electrode embedded in the insulator, at least one ground electrode attached to a front end of the shell, an end piece made of a precious metal and/or alloy attached to a front end of the center electrode, and a counterpart made of a precious metal and/or alloy attached to the ground electrode opposite the end piece, between which is a spark gap with a nominal width. The spark gap is produced initially with a width that is smaller, at least in places, than the nominal width, and is subsequently brought to its nominal width by removing material from at least one of the two surfaces of the end piece and the counterpart that delimit the spark gap.

Abstract: A method for manufacturing an ignition electrode for spark plugs for internal combustion engines and spark plug manufactured therewith. The method includes producing by powder metallurgy a green part or brown part containing the base metal or the base metal alloy, coating of a part of the surface of the green part or brown part with a mixture that contains the precious metal or the precious metal alloy in the form of a powder and a binder, removing the binder from the layer that was formed by the coating and that contains the precious metal or the precious metal alloy, and sintering the coated green part or brown part to form a composite part. The composite part can be welded as an end piece to the one end of the base-metal section of the ignition electrode.

Abstract: A spark plug having at least one center or ground electrode that includes a first base metal or a first base metal alloy and a precious metal or a precious metal alloy. The at least one electrode has a surface bordering a spark gap that is made of a composite material in which crystalline particles of the precious metal or precious metal alloy are mixed with the first base metal or the first base metal alloy, and a portion of the particles of the precious metal or precious metal alloy forms a portion of the surface that borders the spark gap.

Abstract: A sealing ring for a spark plug that has an external thread for screwing into an internal combustion engine, a collar and a thread undercut between the external thread and the collar. The sealing ring includes a ring-shaped solid sealing element made from metal. The sealing element has two planar annular sealing surfaces that are arranged parallel to one another. An annular retaining element composed of an elastomer for engaging in the thread undercut of the spark plug in a self-retaining manner is attached to the sealing element on the inner ring side thereof. Also included is a spark plug comprising such a sealing ring, and an internal combustion engine comprising such spark plugs.

Abstract: A spark plug having a spark plug body and an insulator arranged therein, in which insulator a passage is provided in which a center electrode, an ignitor and a glass seal connecting the center electrode to the ignitor and acting as an interference-suppression resistor are arranged. At least one additional interference-suppression element is arranged in the passage of the insulator.

Abstract: A spark plug for a gas-powered internal combustion engine, having a center conductor, an insulator surrounding the center conductor, a body surrounding the insulator, a center electrode connected in an electrically conductive manner to the center conductor, and at least one ground electrode that is connected in an electrically conductive manner to the body and forms a spark air gap with the center electrode. A shield that shields the spark air gap in the radial direction of the spark plug is located at the front end of the body. The shield includes multiple shield components that are attached to the front end of the body adjacent to one another in the circumferential direction of the spark plug.

Abstract: A method for manufacturing an ignition electrode for spark plugs for internal combustion engines. The method includes producing by powder metallurgy a green part or brown part containing the base metal or the base metal alloy, coating of a part of the surface of the green part or brown part with a mixture that contains the precious metal or the precious metal alloy in the form of a powder and a binder, removing the binder from the layer that was formed by the coating and that contains the precious metal or the precious metal alloy, and sintering the coated green part or brown part to form a composite part. The composite part is welded as an end piece to the one end of the base-metal section of the ignition electrode.

Abstract: A prechamber spark plug for a gas-powered internal combustion engine having: a metallic body, an insulator, a center conductor connected to a center electrode, a ground electrode, and a cap that is attached to a front end of the body and forms a prechamber. The prechamber can be subdivided into a front part and a back part by an imaginary separating plane that is perpendicular to the center conductor at an end face of the center electrode. The front part of the prechamber is located on the front side of the separating plane, and the back part is located inside the body on the back side of the separating plane so that the volume of the back part is larger than the volume of the front part. Apart from its connection to the front part of the prechamber, the back part is closed in a gas-tight manner.

Abstract: A spark plug for a prechamber internal combustion engine, having: a body with a passage and a front end; a center electrode located in the passage and that projects past the front end; an insulator that surrounds a section of the center electrode and has a tapering front end that together with the passage forms a free annular space within the body; a ground electrode with an annular ignition section that surrounds a section of the center electrode located outside the body, forming a spark gap; the ground electrode has a mounting section connected to the front end of the body, and at least two web sections connecting the ignition section to the mounting section; located between the web sections are scavenging ports through which the annular space is in connection with the environment outside the spark plug.

Abstract: A spark plug for a stationary, gas-powered internal combustion engine, having a metallic body, an insulator mounted in a passage of the body, a center electrode passing through the insulator, a ground electrode mounted on the body that, together with the center electrode, forms a spark air gap, and a cap attached to the body. The cap shields the center and ground electrodes from the combustion chamber after the spark plug is installed in a combustion chamber of the internal combustion engine, and that, together with the body of the spark plug, forms a prechamber in which the center and ground electrodes are located. The cap has at least one opening that permits gas exchange between the prechamber and the space outside of the prechamber.

Abstract: A spark plug for a gas-powered internal combustion engine having: a spark plug body; an insulator; a center electrode; a ground electrode support that is attached to the spark plug body and supports at least one ground electrode that forms a spark gap with the center electrode; a swirl chamber located at the front end of the spark plug whose wall surrounds the center and ground electrodes; the wall of the swirl chamber is formed by a cylindrical sleeve which has an open front face and radial perforations; the ground electrode support includes an annular base part and at least one arm that supports the ground electrode; the arm starts at the base part and extends within the swirl chamber. The arm of the ground electrode support increases in cross-section starting from the ground electrode it supports toward the annular base part of the ground electrode support.

Abstract: A spark plug having a front end of a spark plug body that projects over a front end of an insulator, a recess that is arranged at the front end of the insulator from which a center electrode projects and forms an air spark gap with a ground electrode, an annular intermediate space that is formed by the recess between the insulator and the center electrode, and a surface of the recess that runs in an at least partially curved manner between the center electrode and the end of the spark plug body so that the recess forms an insulating section that prevents a sliding spark between the center electrode and the spark plug body.