Robert Boschgmbh

Stefan Nufer

Bernd Schumann

Karl-Hermann Friese

Ulrich Eisele

Thomas Wahl

Benedikt Reinsch

Hubertus Braun

Carsten Kuenzel

Corinna Vonau

Dennis Quest

Claudio De La Prieta

Thomas Schulte

Detlef Hartmann

Erhard Hirth

Frank Buse

Tina Hirte

Helene Kasjanow

Annika Kristoffersson

Patrick Armstrong

Dominic Lang

Zhuo Tang

Guido Hannich

Thomas Koehler

Jürgen Sindel

A spark plug resistance element that includes at least one inorganic amorphous oxide and at least one first inorganic crystalline oxide having a relative dielectric permittivity of at most 15. A spark plug that includes at least one spark plug resistance element is also described.

Spark plug resistance element and spark plug

The disclosure relates to a housing for a spark plug, having a bore along the longitudinal axis X of the housing, the housing comprises an outer side and an inner side and a galvanically applied nickel and zinc-containing protective layer is arranged on at least one part of the outer side of the housing. A sealing layer, which contains silicon, is arranged on the nickel and zinc-containing protective layer.

Spark plug housing having a galvanic nickel and zinc-containing protective layer and a silicon-containing sealing layer, spark plug having said housing, and method for producing said housing

A spark plug connecting element. The spark plug connecting element includes a first contact element and a second contact element. A resistor element is situated between the first contact element and the second contact element. The first contact element and the second contact element have a specific conductivity of 10S/m to 10S/m and the resistor element has a specific conductivity of 10S/m to 10S/m.

Spark plug connecting element and spark plug

A method for manufacturing a spark plug. The method includes: furnishing an insulator; introducing into the insulator a material mixture that is configured to constitute a resistor paste, the material mixture containing ZrOand SiO; heating the insulator and the material mixture present therein to a temperature T of at least 870&#xb0; C., so that ZrOand SiOin the material mixture react at least partly to ZrSiO.

Spark plug resistance element with increased ZrSiOphase fraction

A spark plug electrode includes an electrode base body made of a first material and an ignition element made of a second material and forming an ignition surface for a spark plug. The electrode base body and the ignition element are integrally joined to each other via a welding seam. A mixing rate for the first or second materials is less than 15 weight percent in a half of the welding seam adjacent to the ignition element. A method for manufacturing a spark plug electrode includes: providing an electrode base body and an ignition element; carrying out a welding process joining the electrode base body and the ignition element while forming a welding seam, where a welding beam guided over the surface of the spark plug electrode by tilting a reflection element, thereby producing a welding seam at a joining point between the electrode base body and the ignition element.

Spark plug electrode and method for manufacturing this spark plug electrode and spark plug including a spark plug electrode

A spark plug includes a housing, an isolator arranged in the housing, and a ground electrode arranged on a front surface of the housing on a combustion chamber side. The spark plug further includes a central electrode, a terminal stud, and a resistance element all of which are arranged in the isolator. The resistance element is spatially arranged between the central electrode and the terminal stud and connects the central electrode to the terminal stud. The ground electrode forms a spark gap together with the central electrode. The resistance element contains a resistance material that contains conductive particles and non-conductive particles. At least 80% of the non-conductive particles have a maximum diameter of 20 &#x3bc;m.

Spark plug resistance element comprising fine non-conductive particles

A spark plug electrode having greater mechanical stability. The spark plug electrode includes a base body and a noble metal pin situated on the base body, the base body and the noble metal pin being connected to each other by a connection zone. The connection zone has at least one first welding seam and one second welding seam.

Spark plug electrode, method for its production, and spark plug

A composite body made of at least two ceramic layers, in which the ceramic layers are permanently bonded to one another at defined bonding points by a contact layer made of a bonding material. To achieve a permanent, thermally stable bond of ceramic layers having different coefficients of thermal expansion, the bonding material has a low modulus of elasticity. During the manufacture of the composite body, the bonding points of the ceramic layers are pretreated to form a porous surface structure, the bonding material is applied to these bonding points, and after the ceramic layers are laid one on top of another with bonding points facing toward one another and bonding material lying between them, the assembled composite body is subjected to a heat treatment.

Composite body made of ceramic layers and method for its manufacture

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Stuttgart, Germany

Stefan Nufer