Robert Boschgmbh

Stefan Rodewald

Lothar Diehl

Hans-Martin Wiedenmann

Jens Schneider

Thomas Wahl

Detlef Heimann

Thomas Moser

Walter Strassner

Ralf Schmidt

Henrik Schittenhelm

Hans-Joerg Renz

Roland Stahl

Juergen Sindel

Carsten Springhorn

Thorsten Ochs

Harald Guenschel

Sabine Roesch

Helmut Marx

Lutz Dorfmueller

Johannes Kanters

Markus Siebert

Henrico Runge

Juergen Ruth

Heiner Scheer

Corinna Vonau

Jürgen Karle

Andreas Schaak

Jan Bahlo

Frank Haag

Marten Mamey

Jürgen Sindel

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

The invention relates to a method for the voltage-controlled performance regulation of the heating of an exhaust-gas probe in the exhaust system of an internal combustion engine. The aim of the invention is to provide a method in which the operating temperature of the probe is achieved in the shortest possible time without damage to the probe. To achieve this, the heating voltage during the heating phase of the probe is rapidly brought up to a high temperature in a start phase in relation to a subsequent phase, or a dramatic leap in temperature is achieved, preferably up to the full operating voltage and the heating voltage is then continuously or quasi-continuously reduced.

Method for the voltage-controlled performance regulation of the heating of an exhaust-gas probe

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 at least one physical magnitude of a gas, in particular of exhaust gases of an internal combustion engine, is proposed, which includes a sensor element having an electrochemical cell. The electrochemical cell includes a first solid electrolyte member on which a first electrode and a second electrode are applied. The first and the second electrode are electrically connected by means of the first solid electrolyte member. The first electrode is in contact with the gas. The area of the first electrode is smaller than the area of the second electrode.

Gas sensor

A layered sensor element used in a gas measuring sensor for measuring a physical property of a measuring gas, preferably for determining the temperature of the measuring gas or the concentration of a component of the measuring gas. The sensor element contains a wave-form heater, which is embedded in a porous heater insulation. At least one separating element having a lower porosity than the porous heater insulation is provided between two adjacent sections of the wave-form heater.

Sensor element

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Ditzingen, Germany

Stefan Rodewald