Oil jet system for internal combustion engine, and control method for oil jet system
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United States of America Patent
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Feb 6, 2018
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N/A
app pub date -
Sep 30, 2014
filing date -
Oct 4, 2013
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Abstract
In an oil jet system that directs an oil jet toward a back face of a piston, when a coolant temperature of an engine has increased to a predetermined temperature in a stopped state of the oil jet, the piston is cooled by starting the oil jet. When a lubricating oil temperature of the engine has decreased to a predetermined temperature in an operated state of the oil jet, a delay time is determined based on a variation amount in engine rotation speed and a variation amount in intake air filling factor during a predetermined period, and the oil jet is stopped after a lapse of the delay time.
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