Robert Boschgmbh

Heinz Geier

Karl-Hermann Friese

Helmut Weyl

Rudolf Pollner

Hans-Martin Wiedenmann

Ulrich Eisele

Friedrich J Esper

Thomas Frey

Bernhard Wild

Peter Dettling

Siegfried Nees

Ernst Linder

Klaus D Muller

Franz Rieger

Thomas Brinz

Werner Gruenwald

Gert Lindemann

Claudio De La Prieta

Friederike Lindner

Rainer Maier

Craig Magera

Gerhard Holfelder

Herbert Triptrap

Thomas Egner

Bettina Schneider

Imke Koengeter

Gunther Knoll

Michael Liebler

Eckhardt Kuglin

Michael Hausser

Peter Wange

Helmut Mauer

A gas sensor, whose purpose is to determine a physical property of a measuring gas, e.g., to determine the concentration of a gas component or the temperature of an exhaust gas. The gas sensor includes a sensor element arranged in a metal housing which is sealed by at least one sealing element arranged in a metal receptacle. The metal receptacle is affixed to the housing. The sealing element surrounds the sensor element in a centered position along its longitudinal extension L or on its half facing the measuring gas.

Gas sensor and method for production thereof

A method for manufacturing a starting element, in particular a sheathed-element glow plug, for the combustion process in an internal combustion engine having a ceramic element () is proposed, which substantially improves the glazing of the ceramic element (). According to the present invention, this is achieved by a dry glaze () being applied on the ceramic element ().

Starting element having ceramic component electrostatically coated with a dry glaze

A spark plug includes a ceramic component, whose surface is at least in part coated with a glaze, with the glaze containing 0.6% to 4% by weight of fluoride and 6% to 11.2% by weight of zinc oxide.

Method for manufacturing a spark plug with glaze coating

Spark plug with glaze coating

A gas sensor includes a sensor element for determining at least one physical quantity of a gas, e.g., for determining the concentration of a gas component in an exhaust gas of an internal combustion engine or the temperature of the exhaust gas. The sensor element is fixed in position by the sealing system in a housing of the gas sensor. The sealing system includes at least one sealing element, which includes a mixture of a ceramic material and a glass. The hemisphere temperature of the glass is above 750&deg; Celsius.

Sealing system for a gas sensor and a method for manufacturing the sealing system

A glass ceramic, for use as a resistor or a gas-tight glass ceramic solder for use in a spark plug, includes a fused seal of a starting glass fused from a starting mixture containing SiO , Al O , TiO and CaO, the fused seal including crystalline phases in at least some areas. A method for producing such a glass ceramic provides for the starting glass to be processed in a first method step to form a starting material, which is heated for a first period of time in a second method step from a starting temperature, which is below the softening temperature of the starting glass, to a fusion temperature, which is above the softening temperature of the starting glass, and is kept at that temperature for a second period of time and finally is cooled again. A spark plug may include a terminal stud and a center electrode, which are electrically connected across a resistor that is formed in at least some areas by the glass ceramic.

Glass ceramic material, method for producing the same and spark plug containing such a glass ceramic material

A glass or glass powder is fused from a starting mixture containing approximately 38 wt % to 48 wt % SO , 15 wt % to 19 wt % Al O , 4.5 wt % to 11 wt % TiO , 0 wt % to 1.5 wt % Na O, 0 wt % to 1.5 wt % K O and 23 wt % to 30 wt % CaO. In addition, a glass powder mixture includes two glass powders, a carbon black powder and an organic binder, the first glass powder having a mean particle size of approximately 150 &mgr;m to 250 &mgr;m, the second glass powder having a mean particle size of less than approximately 100 &mgr;m, which may be 10 &mgr;m to 70 &mgr;m. The glass or glass powder mixture is suitable for producing a glass ceramic, such as that used as a resistor seal and/or a gas-tight glass ceramic solder in a spark plug.

Glass and glass powder mixture and use thereof for the production of a glass ceramic

A sensor element, especially a temperature sensor ( ) is proposed, having a sensitive area ( ), whose electrical resistance changes under the influence of a temperature to which the sensitive area ( ) is exposed. In this case, sensitive area ( ) has a glass ceramic fusion ( ) of a starting material containing at least one component which is furnished at least substantially with a surface metallization. The proposed temperature sensor ( ) is especially suitable for use at temperatures in excess of 1000&deg; C., at which it shows resistance characteristics like that of a platinum resistor.

Sensor element, in particular a temperature sensor

A sensor for determining an oxygen content in an exhaust gas of an internal combustion engine includes a receptacle, arranged in a longitudinal bore of a metal housing, for a sensing element. The sensing element is received in the receptacle in a gas-tight fashion via a sensing element seal, which includes a glass seal. The receptacle has a measured-gas-side ceramic shaped element and a connector-side ceramic shaped element, which are arranged axially one behind the other. A cavity into which the glass seal is pressed while hot is configured between the two ceramic shaped elements.

Sensor and method for the manufacture

A measuring sensor, in particular, for determining the oxygen content in exhaust gases of internal combustion engines, includes a ceramic molding arranged in a metal housing for the accommodation of a sensor element, in particular, planar, the sensor element being sealed by a seal element made of warm-deformable temperature-resistant material. The molded housing is designed in one piece and has a cylindrically shaped longitudinal hole on the connector side, around the sensor element, and the seal element is compressed between a first compressing element on the measuring-gas side and a second compressing element on the connector side, such that it tightly encloses the sensor element and hermetically seals the sensor element with respect to the molded housing.

Measuring sensor and method for its fabrication

Detector and method for the production thereof

An insulation layer system, in particular for gas sensors, is proposed, having at least one electrically conductive solid-electrolyte layer (10), an electrically conductive layer (20) and at least one electrically insulating layer (13) between the solid-electrolyte layer (10) and the electrically conductive layer (20). The material of the insulating layer (13) contains, prior to sintering, pentavalent metal oxides of niobium or tantalum as an additive, it being possible for the additive to diffuse into the adjoining solid-electrolyte layer (10) during sintering.

Insulation layer system for the electrical isolation circuits

Stable ceramic consisting of aluminum oxide

To decrease the preheat time and power requirements in preheater-type glow plugs for Diesel engines, a closed ceramic tube (20), for example of aluminum oxide and of about 5 mm diameter has, on the bottom (21) thereof applied a layer or film-like heater element (24, 24'), for example in an undulating or zig-zag configuration (FIG. 2) or in form of a constriction or pinch (FIG. 4: 24') to provide a concentrated point or strip source of heat. The heater layer itself is protected by a protective coating (25) and, to provide for the required heat distribution, the underlying bottom (21, 21') of the tube (20, 20') supports an insulating intermediate layer and possibly a heat conductive layer is intermediate. Preheat times in the order of 1-2 seconds, with lower current consumption than prior wound-wire plugs can be obtained.

Glow plug, particularly for diesel engine

To facilitate mass production and permit ready introduction of a substance which provides an oxygen partial pressure reference level, for example the oxygen in ambient air, an elongated plane flat plate-like solid electrolyte body is provided with electrodes thereon, and one of the electrodes is covered by a trough-like cover element to form the reference electrode, the space beneath the trough-like element and the electrode itself being available for the substance which may, but need not be, the oxygen of air, and may be a solid material providing a reference oxygen partial pressure level. The cover plate may, itself, be made of solid electrolyte material and may form a portion of another sensing element, so that a plurality of sensing elements can be superimposed in sandwich-like fashion. A heater element can be applied to a flat plate element of the assembly where desired. The sensors can operate in the potentiometric or polarographic mode.

Electrochemical sensor, particularly for oxygen determination in

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Leonberg, Germany

Heinz Geier