System and method for inferring engine oil temperature at startup
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United States of America Patent
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May 21, 2002
Grant Date -
N/A
app pub date -
Jul 17, 2000
filing date -
Jul 17, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Systems and methods for determining engine oil temperature without an oil temperature sensor infer the oil temperature at engine start based on the calculated temperature at power down and various other parameters which may include engine coolant temperature, soak time, ambient temperature, and whether an engine block heater has been used. The invention provides a more accurate determination of engine oil temperature to allow more precise engine control particularly during cranking and during the first few minutes of engine operation.
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