Robert Boschgmbh

Theodor Graser

Johann Wehrmann

Gerhard Hoetzel

Heinz Eisenschmid

Anton Hans

Helmut Weyl

Hans-Martin Wiedenmann

Harald Neumann

Olaf Jach

Rolf Mayer

Clemens Simon

Karl-Heinz Effenberger

Peter Brida

Hans-J&ouml;rg Renz

Hnas-Joerg Renz

A method for manufacturing a sensing element is provided, in particular for determining the oxygen content in exhaust gases of internal combustion engines, a composite construction having at least one ceramic paste (green film) present in film form being sintered to yield the sensing element, and sharp edges of the sensing element being blunted before sintering to increase the thermal shock resistance of the sensing element.

Method for producing a sensor element

A gas sensor, in particular a lambda probe, for ascertaining the pollutant and/or oxygen content in emission gases of internal combustion engines, having a housing accommodating at least one sensor element, the sensor element having a section on the terminal side and a section on the measuring-gas side, and having a connecting element that connects the sensor element, which has a plurality of electrically conductive contact areas, at its terminal-side section to a plurality of electrically conductive supply leads. The gas sensor has the feature of a connecting element which is formed from a spring element produced in one piece from ceramic material.

Gas sensor

A sensor, particularly for determining the oxygen content in exhaust gasses of internal combustion engines, includes sensor element which is fixed in a metallic housing and a sealing flange which is integrally formed on the housing and rests on a sealing seat which is formed on an exhaust system. The sealing flange has two ring elements which are integrally formed on the housing and each have an inclined sealing surface, a hollow space being formed between the two ring elements inside the housing.

Measuring probe

Multiple contacts are provided in an electrical contacting arrangement of a sensor element, and the sensor element has a connection-side section with contact points, or contact pads, which are each integrally bonded to a corresponding contact. Each of the multiple contacts, at least on the section in contact with the contact point on the sensor element, has a layer by which the integral bond is formed between the contact and the contact point on the sensor element. The contacts are joined to the corresponding contact points on the sensor element by diffusion soldering or diffusion welding. Each contact has a curved intermediate section which compensates for thermal and/or mechanical expansion and movements.

High temperature stability sensor contact, method for the production thereof

The invention is directed to a method for detecting the oxygen content in a gas to be measured. At least one concentration cell operating in accordance with the Nernst principle is provided. The concentration cell includes a measuring electrode communicating with the gas and a solid electrolyte and a reference electrode connected to the measuring electrode through the solid electrolyte. A pump-current pulse is applied between the reference electrode and the measuring electrode and, directly after the end of each pump-current pulse, the current flow between the reference electrode and the measuring electrode is reversed in a pulse-like manner.

Method and arrangement for detecting the oxygen content in a gas

A sensor element for an electrochemical sensor that determines the oxygen content of exhaust gases produced by internal combustion engines. The sensor element includes at least one measurement device and at least one heating device associated with the measurement device. The measurement device and the heating device both include individual functional layers laminated one above another. The heating device is covered with a surface layer that covers not only the surface of the outermost layer of the functional layers of the heating device, but also the side surfaces of all the functional layers of the heating device.

Sensor element

Measuring sensor

Measuring instrument

Growing community of inventors

Stuttgart, Germany

Theodor Graser