Method for avoiding misdetection in a diagnosis of a tank venting system for a motor vehicle
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United States of America Patent
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-
Mar 28, 2000
Grant Date -
N/A
app pub date -
Nov 17, 1997
filing date -
Nov 15, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A method for avoiding misdetection in a diagnosis of a tank venting system for a motor vehicle includes deriving a statement about a fill level of a fuel tank by evaluating a signal of a pressure sensor in the tank venting system. To that end, prior to the diagnosis of the tank venting system, the pressure fluctuations are detected and compared with a threshold value. If the pressure fluctuations exceed the threshold value, then a conclusion is drawn that the fuel tank is full, and the diagnosis is not enabled.
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