Robert Boschgmbh

Johannes Kanters

Lothar Diehl

Johann Riegel

Thomas Moser

Eberhard Schnaibel

Werner Gruenwald

Ulrich Eisele

Erich Junginger

Horst Boeder

Carsten Springhorn

Lutz Dorfmueller

Frank Kowol

Gerd Scheying

Stefan Rodewald

Ruediger Deibert

Reinhard Hein

Ingrid Wuehrl

A procedure to calculate the Lambda value with a wideband Lambda sensor of an internal combustion engine of a motor vehicle is thereby characterized, in that from the measured pumping electricity and the sensitivities of the wideband Lambda sensor as well as the gas concentration ratios, in the lean operation an oxygen concentration and in the rich operation an oxygen deficit are determined and from these respectively a conclusion is drawn about the Lambda value using the Pischinger Formula.

Procedure for the determination of the Lambda values with a broadband Lambda probe

A sensor element having a layer configuration, for detecting a physical property of a gas, in particular for detecting the concentration of a gas component in an exhaust gas of an internal combustion engine. The sensor element has a measuring device, used to detect a physical property of the gas, and a heating device. The heating device includes a heater, which is electrically connected to a first heater supply lead and a second heater supply lead. The first heater supply lead is arranged in a plane of stratification between the second heater supply lead and the measuring device. The first heater supply lead is at an at least largely constant electrical potential.

Sensor element

A gas sensor is described for detecting a physical property of a measuring gas, including detecting the oxygen concentration in the measuring gas. The gas sensor includes a sensor element having a diffusion barrier, which is arranged between a first solid electrolyte layer and a second solid electrolyte layer. The diffusion barrier has a necked-down portion, i.e., a concave profile, between the first and the second solid electrolyte layer. Accordingly, a first area, which the diffusion barrier occupies in a plane which lies between the side of the first solid electrolyte layer (facing the diffusion barrier) and the side of the second solid electrolyte layer (facing the diffusion barrier), is smaller than a second area on which the diffusion barrier covers the first or the second solid electrolyte. In order to manufacture the sensor element, a first layer made of a paste containing a pore-forming material is applied onto a blank foil, and after that, a second layer made of a paste containing a pore-forming material is applied.

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.

A method is presented for determining the fuel/air ratio in the individual cylinders (single cylinder lambda) of an internal combustion engine having a plurality of cylinders, whose exhaust gases mix together in a common exhaust gas pipe system, from the signal of an exhaust gas probe, whose mounting location lies in the common exhaust gas pipe system, with the aid of an invertible model for the intermixing of the exhaust gases at the mounting location of the exhaust gas probe. The method is distinguished in that, in the determination of the single cylinder lambda from the signal of the one exhaust gas probe evaluated with the aid of the inverted model, the rotational angle position of the exhaust gas probe at its mounting position is taken into consideration.

Method for determining the fuel/air ratio in the individual cylinders of a multi-cylinder internal combustion engine

A polymer compound containing a ceramic powder and a polymer is described, the ceramic powder having a specific surface area of more than 1.8&middot;10 m /m and constituting more than 5 vol. % of the polymer compound, the polymer being shear resistant, and the pore sizes in the polymer compound being 3-15 nm. Furthermore, a method for manufacturing this polymer compound, its use, and a sintered body manufactured therefrom are also described.

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Stuttgart, Germany

Johannes Kanters