Piston ring for internal combustion engines with increased fatigue strength, and method for producing same
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United States of America Patent
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Aug 1, 2017
Grant Date -
Dec 10, 2015
app pub date -
Oct 29, 2013
filing date -
Jan 10, 2013
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Abstract
A piston ring (2) having increased fatigue resistance includes a plastically deformable material. The piston ring (2) has a running face (4), which is delimited at the top by an upper running face edge (3) and at the bottom by a lower running face edge (1). Compressive stresses are introduced into the upper running face edge (3) and/or into the lower running face edge (1) along at least one part of the circumference, the compressive stresses having been produced by roller burnishing.
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