PISTON WITH OPTIMIZED OIL RING NEGATION
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United States of America Patent
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Issued Date -
Oct 31, 2019
app pub date -
Apr 26, 2018
filing date -
Apr 26, 2018
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Abstract
A piston formed of steel and/or cast iron for a heavy-duty diesel engine which includes an oil belt for controlling an oil film and thus achieving reduced oil consumption and carbon build-up is provided. The piston includes an uppercrown portion presenting a combustion surface, a ring belt depending from the combustion surface, pin bosses depending from the ring belt, and skirt panels depending from the ring belt and located diametrically opposite one another. The ring belt includes two ring grooves preferentially but accommodates a 3 ring groove version for containing piston rings. The oil belt is located axially below a pin bore on the pin bosses. The oil belt also has a convex shape extending continuously around a circumference of the piston.
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