Precision Lubrication of a Reciprocating Piston Within a Cylinder
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United States of America Patent
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Issued Date -
Jun 4, 2015
app pub date -
Dec 1, 2014
filing date -
Dec 3, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Two-stroke engines are particularly prone to piston scuffing due to insufficient oil at some operating conditions. A system and method to precisely deliver oil is disclosed. An oil reservoir groove is formed in the piston with an oil reservoir ring welded to the surface of the piston. A cavity behind the ring forms an oil reservoir. The ring has an inlet gap. The cylinder wall has an oil injector installed therein which sprays oil into the inlet gap when the inlet gap is proximate the oil injector tip. An electronic control unit commands the quantity of oil to provide to the oil reservoir, with the quantity and timing of the injections based on the operating conditions of the engine.
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