Robert Boschgmbh

Markus Ulrich

Rainer Haeberer

Matthias Horn

Bruno Hezel

Philipp Nolte

Michael Gerlach

Thomas Hanses

Christoph Zimmer

Wolf-Ingo Ratzel

Michael Krause

Christoph Waletzek

Vaclav Straus

Robert Hartl

Markus Christen

Guenther Krenz

Vlatko Babic

Christopher Haug

A method for evaluating signals of a sensor unit including at least two sensors. The method includes reading in a first sensor value of a first of the sensors and a second sensor value of a second sensor, the first and second sensor value each representing one parameter of a substance to be measured by the sensors or a linking of the parameters. A threshold value range is read in, which maps a range of combinations of at least the first and second sensor values, which represents the presence or a value of the substance to be measured in surroundings of the first and second sensors. A combination of the read-in first and second sensor values is recognized as being outside the threshold value range. The threshold value range is changed into a changed threshold value range so that the combination is situated within the changed threshold value range.

Method and device for evaluating signals of a sensor unit including at least two sensors

The invention relates to a pumping device () for supplying an exhaust gas aftertreament system () of an internal combustion engine with a reductant (), in particular with a urea-water solution, in order to reduce nitrogen oxides (NOx) in the exhaust gas flow of the internal combustion engine, comprising a motor () for driving two pumps (). According to the invention, the first pump () is connected to the motor () by means of a first coupling, and the second pump () is connected to the motor by means of a second coupling. In a preferred embodiment, the couplings are designed as freewheel couplings () acting in opposite directions, so that a switch between a 'pumping state' and a 'suck-back state' can be made by simply reversing the direction of rotation of the motor ().

Pumping device for supplying an exhaust gas aftertreatment system of an internal combustion engine with a reductant, and method

The invention relates to a sensor arrangement for determining a tank fill level of a liquid, especially a reducing agent for removing nitrogen from the exhaust gases of an internal combustion engine, which liquid is contained in a tank, at least two electrically conductive measuring electrodes being at least partially embedded in a carrier that is produced of an electrically non-conductive material. The sensor arrangement includes a temperature sensor, especially a resistor with negative temperature coefficient being used as a temperature sensor, which is integrated into the carrier.

Sensor arrangement for determining a tank fill level, and method for producing it

Known pressure regulating valves have a valve closing body, which cooperates with a valve seat, and a restoring spring, which acts on a valve closing body in the direction facing away from the valve seat. It is disadvantageous that the restoring spring is disposed in a pressure chamber, which has the valve seat and through which aggressive blowby gases flow out of the crankcase. The blowby gases for instance have a corrosive, etching effect on the material of the restoring spring, shortening the service life and lessening the spring force of the restoring spring. This has a highly adverse effect on the regulation of the pressure in the crankcase. In the pressure regulating valve of the invention, the service life of the restoring spring is increased. According to the invention, the restoring spring () is embodied as a tension spring and is located on the side of the valve closing body () facing away from the valve seat ().

Pressure regulating valve

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Rudersberg, Germany

Markus Ulrich