Also known as (Cylinder Sleeving), (cylinder liner)
central working part of a reciprocating engine or pump, the space in which a piston travels, often equipped with a cylinder liner
In an engine, the cylinder is the space in which a piston travels.
The inner surface of the cylinder is formed from either a thin metallic liner (also called "sleeve") or a surface coating applied to the engine block. A piston is seated inside each cylinder by several metal piston rings, which also provide seals for compression and the lubricating oil. The piston rings do not actually touch the cylinder walls, instead they ride on a thin layer of lubricating oil.
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