The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 2009
Filed:
Apr. 24, 2007
Rainer Strohmaier, Stuttgart, DE;
Torsten Handler, Stuttgart, DE;
Bernhard Kamp, Ludwigsburg, DE;
Katharina Schaenzlin, Rottenburg-Obernau, DE;
Henrik Schittenhelm, Stuttgart, DE;
Andreas Sturm, Assamstadt, DE;
Rainer Strohmaier, Stuttgart, DE;
Torsten Handler, Stuttgart, DE;
Bernhard Kamp, Ludwigsburg, DE;
Katharina Schaenzlin, Rottenburg-Obernau, DE;
Henrik Schittenhelm, Stuttgart, DE;
Andreas Sturm, Assamstadt, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
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.