Robert Boschgmbh

Detlef Heimann

Lothar Diehl

Bernd Schumann

Thomas Wahl

Rainer Strohmaier

Carsten Springhorn

Margret Schuele

Jens Schneider

Hans-Joerg Renz

Thomas Moser

Sabine Thiemann-Handler

Bernhard Bloemer

Harald Neumann

Berndt Cramer

Juergen Ruth

Helmut Weyl

Hans-Martin Wiedenmann

Ulrich Eisele

Ralf Schmidt

Thorsten Ochs

Gudrun Oehler

Torsten Handler

Henrik Schittenhelm

Joachim Berger

Bernhard Kamp

Henrico Runge

Stefan Rodewald

Jens Stefan Schneider

Roland Stahl

Norbert Breuer

Ralf Wirth

Bernd Reinsch

Thomas Seiler

Goetz Reinhardt

Harald Guenschel

Sabine Roesch

Lutz Dorfmueller

Helmut Marx

Markus Siebert

Karl-Franz Reinhart

Harry Braun

Juergen Sindel

Norman Hahn

James Richard Waldrop

Walter Bauer

John Day

Alexander Bischoff

Bernard Kamp

Dieter Lindauer

Juergen Werner

Mike McCormick

Damien Barnes

Dietmar Seizinger

James-Richard Waldrop, Ii

Dieter Lehmann

Joerg Jockel

Thomas Grau

Kai-Achim Baldenhofer

Jan Bahlo

Bjoern Janetzky

Andreas Schaak

Christoph Renger

Kai Baldenhofer

A heating device for a sensor element of a gas sensor, in particular for use in exhaust gas analysis of internal combustion engines, has a heating element, which has an electrical resistor layer. The heating element is electrically insulated from at least one solid electrolyte layer by a layer containing barium and/or strontium and/or calcium. For this purpose, the heating element is embedded in a first insulator, which is adjoined by a second insulator. The first insulator has a higher barium and/or strontium and/or calcium content (expressed in weight percentage) than the second insulator.

Gas sensor heating device insulation

A sensor element is provided for gas sensors, in particular to determine particles in gas mixtures, the sensor element including at least one electrochemical measuring element exposed to the gas mixture to be determined, and at least one temperature-measuring element integrated into the sensor element. The temperature-measuring element includes a resistor track, which has an electric resistance of less than 180 Ohm at 0&#xb0; C. The resistor track may thus be produced by thin-foil technology, such as screen printing, for example.

Sensor element for gas sensors and method for operating same

A gas sensor for detecting particles in a gas stream has a first electrochemical pump cell, which has a measuring chamber in which a first electrode is disposed to pump particles between the first measuring chamber and the gas stream. Furthermore, a second electrochemical pump cell is provided, which has a second measuring chamber in which a second electrode is disposed so as to pump particles. The second measuring chamber is connected to the gas stream via an absorber medium for absorption of the particles to be detected. This makes it possible to absorb the particles to be detected in a first operating mode using the absorber medium, and to desorb the absorbed particles in a second operating mode, and to detect the quantity of the desorbed particles. Thus, the gas sensor is able to take even low concentrations into account, and short-term measuring errors do not have such a serious effect.

Gas sensor and method for detecting particles in a gas flow

A measuring sensor is described for determining a physical property of a measured gas, especially for determining the oxygen concentration or the pollutant concentration in the exhaust gas of internal combustion engines, which has a sensor element that is exposable to the measured gas which is at least partially coated with a protective layer that protects against harmful components in the measured gas. In order to achieve producing a 'contamination protection', that is cost-effective from a manufacturing technology point of view, particularly against silicon compounds and phosphorus compounds, the protective layer () is made of highly active &#x3b3;- or &#x3b4;-aluminum oxide (AlO) having additives of compounds of the alkaline metals group, the alkaline earths group, the IV B subgroup or the lanthanides group.

Measuring sensor

A sensor element is used to detect a physical property of a measuring gas, preferably to determine the oxygen content or the temperature of an exhaust gas of an internal combustion engine. The sensor element contains a first solid electrolyte layer and a second solid electrolyte layer. A first printed conductor and a second printed conductor are provided on opposite sides of the first solid electrolyte layer, the first printed conductor including a first electrode and a feed line to the first electrode, and the second printed conductor including a second electrode and a feed line to the second electrode. A third printed conductor, which includes a third electrode and a feed line to the third electrode, is provided on the second solid electrolyte layer. The second printed conductor is positioned between the third electrode and the first printed conductor.

Sensor element

A sensor for detecting particles in a gas flow, in particular soot particles in an exhaust gas flow, includes at least two measuring electrodes, which are positioned on a substrate made of an insulating material. To protect the measuring electrodes, they are covered by a protective layer.

Sensor for detecting particles

Platinum metal cermet electrodes are described on which the electrochemical reduction of oxygen is made easier compared to known platinum metal cermet electrodes. The ceramic component of a platinum metal cermet electrode contains stabilized ZrOas its main constituent, the composition of the electrode being directed toward reducing its polarization resistance.

Cermet electrodes containing platinum for the electrochemical reduction of oxygen

A sensor element of a gas sensor is described, this sensor being used to determine the concentration of at least one component of a gas mixture, in particular in exhaust gases of internal combustion engines. It includes at least two electrodes which are situated in an internal gas space which is in direct contact with the gas mixture, the one electrode containing a first material and the second electrode containing a second material. The internal gas space contains a means which acts physically and/or chemically to prevent diffusion of metal between the electrodes.

Sensor element of a gas sensor

An unheated planar sensor element for determining the concentration of a gas component in a gas mixture, in particular the oxygen concentration in the exhaust gas of an internal combustion engine, has a sensor foil made of a solid electrolyte with an outer electrode exposed to the measuring gas, and an inner electrode exposed to a reference gas, as well as a reference-gas channel, which is covered by the sensor foil on one side and accommodates the inner electrode. To produce a small-volume, cost-effective unheated sensor element for use in small combustion engines having low power output yet sufficiently satisfactory measuring accuracy, the reference-gas channel is sealed on the underside by an additional sensor foil made of a solid electrolyte, and covered by an inner electrode lying inside the reference-gas channel and an outer electrode exposed to the measuring gas.

Unheated planar sensor element for determining the concentration of a gas component in a gas mixture

A heating device for a gas sensor, in particular for use in the exhaust gas analysis of internal combustion engines, including a heating element having an electrical resistor layer. The heating element is embedded in a first insulation which in turn is surrounded, at least in part, by a second insulation. The first and the second insulation have different porosities.

Heating device

For the reduction of internal stresses and formation of cracks caused thereby, an exhaust gas probe includes two measuring electrodes separated by a solid electrolyte layer made substantially of ZrO and a circuit-board conductor layer for electrically heating the solid electrolyte layer. The circuit-board conductor layer is firmly connected to the solid electrolyte layer via a first sealingly sintered insulating layer made of an Al O -containing material. A pore-forming material is added to the Al O -containing material before. sintering.

Exhaust gas probe

An electrochemical gas sensor for determining the concentration of gas components in a gas mixture, in particular for determining NOx and HC. The gas sensor includes a first measuring gas space which is connected to the measuring gas, and a second measuring gas space which is connected to the first measuring gas space by a connecting channel. Furthermore, a first electrode and a second electrode, arranged in the first measuring gas space, and at least one third electrode arranged in the second measuring gas space, and at least one fourth electrode are provided. The two measuring gas spaces are arranged in layer planes on top of one another and are separated from one another by at least one oxygen ion conducting layer, the connecting channel passing through the oxygen ion conducting layer.

Electrochemical gas sensor

A heating conductor, in particular for a sensor for determining at least one gas component in the exhaust gases of internal combustion engines. The heating conductor formed from a cermet which contains platinum, at least one metal oxide, and at least two further precious metals. A method for manufacturing the heating conductor by applying a paste containing a platinum powder, a metal oxide powder, and at least two further precious metals, to a ceramic foil and sintering the paste and ceramic foil combination.

Heat conductor, especially for a sensor, and method for producing such a heat conductor

A sensor for determining gas components and concentrations in a gas mixture that is particularly suitable for analyzing HC, NO and CO in exhaust gases of internal combustion engines in the sensor, an outer electrode, that is separated from an MO electrode by an electrolyte layer, is applied on a substrate. In this context, the outer electrode and the MO electrode are in communication with the gas mixture to be analyzed. In addition, the outer electrode contains a region that is in contact with a gas-permeable tunnel layer which in turn contains a region that is directly exposed to the gas mixture to be analyzed, so that the gas to be analyzed can be supplied to the outer electrode via the gas-permeable tunnel layer.

Sensor for analyzing gases

A gas sensor in the form of a mixed-potential sensor in which the influence of temperature-dependent interference is reduced. An improved temperature control is provided with the help of a temperature sensor mounted on the surface of the electrolytic substrate.

Gas sensor

Growing community of inventors

Gerlingen, Germany

Detlef Heimann