Measuring and testing – Internal combustion engine or related engine system or... – Testing of an individual engine part
Reexamination Certificate
2011-04-26
2011-04-26
McCall, Eric S (Department: 2855)
Measuring and testing
Internal combustion engine or related engine system or...
Testing of an individual engine part
Reexamination Certificate
active
07930933
ABSTRACT:
A method and a device for the diagnosis of at least one gas exchange valve of at least one cylinder of an internal combustion engine that is on the one hand reliable and on the other hand does without additional sensor equipment are described. In a first operating state of the internal combustion engine, at least one gas exchange valve of the at least one cylinder is activated. In a second operating state of the internal combustion engine, all the gas exchange valves of the at least one cylinder are deactivated and therewith closed in stationary fashion. Sound waves produced by the internal combustion engine are acquired. It is checked whether a significant change occurs in a quantity characterizing the acquired sound waves upon a transition from the first operating state to the second operating state. In this case, an erroneous opening of the at least one gas exchange valve is recognized.
REFERENCES:
patent: 2004/0083049 (2004-04-01), Fuchs
patent: 2006/0151223 (2006-07-01), Knoll
patent: 2010/0106393 (2010-04-01), Sgatti et al.
patent: 10 2005 049 777 (2007-04-01), None
Kenyon & Kenyon LLP
McCall Eric S
Robert & Bosch GmbH
LandOfFree
Method and device for diagnosing at least one gas exchange... 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 and device for diagnosing at least one gas exchange..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for diagnosing at least one gas exchange... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2631090