System and method for reducing engine oil dilution
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United States of America Patent
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Oct 18, 2016
Grant Date -
Dec 24, 2015
app pub date -
Jun 18, 2014
filing date -
Jun 18, 2014
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Abstract
Methods and systems are provided for modeling an oil dilution qualitative indicator based on an integrated difference between a commanded air-to-fuel ratio and an engine air-to-fuel ratio as determined via an oxygen sensor, cumulative cold engine temperature operating duration, and fuel injection characteristics (timing, duration, number of injections) allowing fuel injection timing modifications that minimize oil dilution when the oil dilution qualitative indicator is greater than a threshold level.
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