Robert Boschgmbh

Katharina Schaenzlin

Henrik Schittenhelm

Torsten Handler

Bernhard Kamp

Sabine Rösch

Dirk Samuelsen

Ralf Schmidt

Rainer Strohmaier

Uwe Glanz

Ralf Wirth

Helmut Marx

Michael Kolitsch

Werner Christl

Frank Schnell

Heribert Haerle

Andreas Sturm

The invention relates to a device used to measure exhaust gas having ionised particles in a motor vehicle. The device comprises an ionising device which includes an electrode arrangement and a charge measuring device. The electrode arrangement comprises at least one pair of electrodes including at least one electrode and at least one counter electrode. A dielectric is arranged between the electrode and the counter electrode in order to generate a dielectrically impeded discharge. The invention also relates to a corresponding method.

Device and method for measuring exhaust gas with charged particles

A method for operating a sensor for recording particles in an exhaust gas flow and a device for carrying out the method are provided, in which at least one measure of the exhaust gas flow is ascertained and in which the measure of the exhaust gas flow is taken into consideration in the valuation of the particle sensor signal made available by the particle sensor. The procedure is based on the knowledge that the exhaust gas flow, for instance, the exhaust gas volume flow, has an influence on the particle sensor signal made available by the particle sensor, especially when the measuring effect is based on the depositing of particles on a sensor surface. Using the procedure, a possibly present cross sensitivity of the particle sensor with respect to different exhaust gas flows is taken into consideration, so that the measuring accuracy is increased.

Method for operating a sensor for recording particles in a gas stream and device for implementing the method

A soot particle sensor for an exhaust system of an internal combustion engine includes a first electrode device and a second electrode device. The electrode devices are situated at a distance from one another and are able to be exposed to the gas stream, at least in some areas. It is provided that the electrode devices are separated from each other by an intermediate layer made of an electrically insulating material, and the electrode devices have free edges that are set apart from each other by the thickness of the intermediate layer and are able to be exposed to the gas stream.

Sensor for detecting particles in a gas stream and method for its manufacture

The invention concerns a procedure to determine a mass of particles or a particle mass flow in an exhaust gas system of an internal combustion engine, whereby at least one resistive particle sensor is disposed in the exhaust gas system of the internal combustion engine. The measured signal change of the particle sensor is compared with a predicted signal change of the particle sensor ascertained from an engine model. If the measured signal change of the particle sensor and/or the predicted signal change of the particle sensor are corrected while taking into account the influencing variables on the transverse sensitivities of the particle sensor, it is possible when ascertaining the predicted signal change of the particle sensor that a compensation for the transverse sensibilities can result even during dynamic operating point changes of the internal combustion engine, which occur faster than the actuation of the particle sensor. This is the case because the correction can even be implemented for small predicted signal changes, such as those occurring during a currently transpiring operating point of the internal combustion engine. Because the predicted signal changes are ascertained from a set of characteristic curves of the engine model, these measurement intervals capable of being assigned to very short times and for that reason to individual operating points of the internal combustion engine can be determined with the very small predicted signal changes, which are required for this purpose.

Exhaust gas sensor

Growing community of inventors

Rottenburg-Obernau, Germany

Katharina Schaenzlin