Measuring and testing – Internal combustion engine or related engine system or... – Exhaust system
Reexamination Certificate
2011-03-29
2011-03-29
McCall, Eric S (Department: 2855)
Measuring and testing
Internal combustion engine or related engine system or...
Exhaust system
Reexamination Certificate
active
07913550
ABSTRACT:
A method to diagnose an exhaust gas sensor disposed in the exhaust gas region of an internal combustion engine, wherein provision is made for a comparison of a measurement for at least one exhaust gas component with a measurement of the exhaust gas component, which is ascertained on the basis of an exhaust gas sensor signal, and a device to implement the method are proposed. The diagnosis is only implemented if a change in at least one operating parameter of the internal combustion engine and/or at least one parameter of the exhaust gas is detected during the running operation of the internal combustion engine. Provision is made in the diagnosis for an averaging of the measurement for at least the one exhaust gas component as well as of the measurement for the exhaust gas component, which is provided by the exhaust gas sensor. Provision is additionally made for a subsequent comparison of the two averages and for an error signal to be provided if the difference of the two averages exceeds a difference threshold value. The procedural approach allows for the diagnosis to occur without a diagnostic intervention into the operation of the internal combustion engine and without an intervention into an open-loop control, which if need be is present, for the metering of a reagent substance, which is introduced into the exhaust gas region of the internal combustion engine to convert at least one exhaust gas component.
REFERENCES:
patent: 4887576 (1989-12-01), Inamoto et al.
patent: 7418322 (2008-08-01), Kariya et al.
patent: 2003/0097873 (2003-05-01), Surnilla
patent: 2005/0102076 (2005-05-01), Kariya et al.
patent: 2007/0227124 (2007-10-01), Fujiki et al.
patent: 2008/0148830 (2008-06-01), Wickert et al.
patent: 44 26 020 (1996-02-01), None
patent: 102 54 843 (2004-06-01), None
patent: 10 2004 031 624 (2006-02-01), None
patent: 10 2005 014 662 (2006-12-01), None
Schoenthaler Jochen
Wickert Stefan
McCall Eric S
Merchant & Gould P.C.
Robert & Bosch GmbH
LandOfFree
Method to diagnose an exhaust gas sensor disposed in an... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method to diagnose an exhaust gas sensor disposed in an..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to diagnose an exhaust gas sensor disposed in an... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2765402