Piston top land structure
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United States of America Patent
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app pub date -
Jul 29, 2016
filing date -
Jul 29, 2016
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Abstract
A piston for a premixed spark-ignited or premixed dual fuel internal combustion engine is disclosed. The piston may be configured to reciprocate along a longitudinal axis of a combustion chamber defined by a cylinder of the engine. The piston may comprise a piston head, a top annular groove configured to receive a top annular ring, and a skirt having a pin bore extending along a pin bore axis that is configured to receive a wrist pin for connecting the piston to a connecting rod. The piston may further comprise a top land formed in the piston head that is chamfered in a direction perpendicular to the pin bore axis such that the top land does not contact an inner wall of the cylinder when the piston rocks about the pin bore axis. The top land may be non-chamfered in a direction parallel to the pin bore axis.
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