Piston ring

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Revision as of 13:53, 10 June 2008 by Mycider (talk | contribs) (yay category)
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A piston ring is an open-ended ring that fits into a groove on the outer diameter of a piston. The two main functions of piston rings in a moped engine are:

  1. Sealing the combustion chamber to maintain good compression.
  2. Supporting heat transfer from the piston to the cylinder wall.