Federal-Mogul Ignition Gmbh

Marko Schwesinger

Werner Niessner

Matthias Blankmeister

Rene Trebbels

Andre Seeber

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.

Spark plug and method for manufacturing same

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.

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Sonneberg, Germany

Marko Schwesinger