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:
Jun. 23, 2015
Filed:
Jun. 30, 2010
Cyril Verdier, Stuttgart, DE;
Stefan Klein, Deizisau, DE;
Gerhard Lemke, Esslingen, DE;
Karsten Glashoff, Deizisau, DE;
Peter Brida, Filderstadt, DE;
Frank Meier, Kornwestheim, DE;
Thomas Seiler, Stuttgart, DE;
Cyril Verdier, Stuttgart, DE;
Stefan Klein, Deizisau, DE;
Gerhard Lemke, Esslingen, DE;
Karsten Glashoff, Deizisau, DE;
Peter Brida, Filderstadt, DE;
Frank Meier, Kornwestheim, DE;
Thomas Seiler, Stuttgart, DE;
ROBERT BOSCH GMBH, Stuttgart, DE;
Abstract
A method is described for diagnosing a heatable exhaust gas sensor of an internal combustion engine, in which a predefined chronologically varying or constant voltage or a predefined chronologically varying or constant current is generated with the aid of a voltage source, the voltage or the current is applied to terminals of the exhaust gas sensor, a current or applied voltage, which flows through the voltage source when the voltage or the current is applied, is detected, and the current or the voltage is analyzed to diagnose the exhaust gas sensor. To diagnose the exhaust gas sensor, which permits a reliable and accurate diagnosis of the exhaust gas sensor and allows a statement about the type of a possibly existing error on the exhaust gas sensor, the method is executed independently of a control and/or regulating unit of the internal combustion engine, an operating temperature of the exhaust gas sensor being regulated to a predefined temperature value with the aid of a regulating element, which is separate from the control and/or regulating unit.