High driveability index fuel detection by exhaust gas temperature measurement
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United States of America Patent
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-
Oct 2, 2001
Grant Date -
N/A
app pub date -
Mar 20, 2000
filing date -
Jun 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for determining if the driveability index of a fuel being consumed by an internal combustion engine differs from the driveability index of a fuel for which the air-to-fuel ratio of the engine is preset. The method includes the steps of: determining the speed of the engine; determining the load on the engine; determining the actual exhaust gas temperature of the engine; and computing a predicted exhaust gas temperature based on the speed, the load and the preset air-to-fuel ratio of the engine. The actual exhaust gas temperature is compared to the predicted exhaust gas temperature to determine if the difference between the actual exhaust gas temperature and the predicted exhaust gas temperature exceeds a predetermined value.
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