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:
Sep. 13, 2016
Filed:
Oct. 12, 2013
Audi Ag, Ingolstadt, DE;
Bodo Odendall, Lenting, DE;
AUDI AG, Ingolstadt, DE;
Abstract
A method for operating an internal combustion engine includes the steps of determining an oxygen filling state of an oxygen storage of a catalytic converter by way of a first lambda signal provided by a first lambda probe and an offset value, the first lambda probe being arranged in an exhaust gas stream upstream of the catalytic converter; when a second lambda signal provided by a second lambda probe arranged in the exhaust gas stream upstream of the catalytic converter falls below a lower lambda signal threshold, setting the oxygen filling state to a first value corresponding to an empty oxygen storage and/or when the second lambda signal exceeds a upper lambda signal threshold setting the oxygen filling state to a second value corresponding to a full oxygen storage; immediately thereafter regulating the oxygen filling state during at least one regulation time period to a target filling state; and after expiration of the regulation time period adjusting the offset value by way of the second lambda signal.