Oil dilution estimation and mitigation control in a fuel injected engine
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United States of America Patent
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Oct 23, 2018
Grant Date -
Oct 13, 2016
app pub date -
Mar 24, 2016
filing date -
Apr 7, 2015
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Abstract
A control device for an engine includes an electronic control unit configured to estimate a water content mixed in engine oil based on a history of a fuel injection amount during an operation of the engine and restrain freezing of water such that, when the water content thus estimated is a predetermined amount or more, the electronic control unit increases a mixing amount of the fuel into the engine oil as compared with a case where the water content thus estimated is less than the predetermined amount. The control device estimates the water content mixed in the engine oil as a function of an integrated value of water content while an oil temperature of the engine is less than a predetermined temperature.
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