Method for diagnosing an internal combustion engine in a motor vehicle
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United States of America Patent
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Jul 5, 2011
Grant Date -
Jun 12, 2008
app pub date -
Nov 20, 2007
filing date -
Nov 22, 2006
priority date (Note) -
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Abstract
A method for diagnosing an internal combustion engine in a motor vehicle having at least one sensor unit, including at least one sound receiver, the sound receiver converting sound waves into an electrical signal. Sound waves of the internal combustion engine are recorded using the sound receiver of the sensor unit and converted into an electrical signal, and the electrical signal is used for the diagnosis of the operating state of the internal combustion engine.
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