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:
Dec. 11, 2007
Filed:
Aug. 02, 2006
Matthias Schueler, Steinheim, DE;
Christian Mader, Gerlingen, DE;
Mohamed Youssef, Nuefringen, DE;
Christian Hugel, Stuttgart, DE;
Matthias Schueler, Steinheim, DE;
Christian Mader, Gerlingen, DE;
Mohamed Youssef, Nuefringen, DE;
Christian Hugel, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
In an internal combustion engine, a structure-borne noise generated in a combustion chamber is detected by a structure-borne noise sensor. A quantity is ascertained on the basis of the structure-borne noise signal. A reference quantity of an undrifted structure-borne noise sensor is ascertained for a certain reference operating state for the combustion chamber, during continuous operation of the engine the quantity is ascertained for the reference operating state, and from a change over time of the ascertained quantity with respect to the reference quantity, a drift of the structure-borne noise sensor is ascertained.