Opposed piston engine cylinder with carbon scraper

A cylinder for an opposed piston engine, comprising:

• a cylinder body including:
• first and second piston bores extending along a central axis for reciprocation of corresponding first and second opposed pistons therein;
• and
• a chamber bore having a generally smooth surface located between the first and second piston bores;
• wherein the first and second piston bores have a piston bore diameter and the chamber bore has a chamber diameter smaller than the piston bore diameter, whereby the chamber bore includes first and second scraper edges.

A multi-cylinder opposed piston engine, comprising:

• a plurality of cylinder liners, each including:
• a liner body including:
• first and second piston bores extending along a central axis for reciprocation of corresponding first and second opposed pistons therein, wherein the first and second piston bores have a piston bore diameter;
• a chamber bore located between the first and second piston bores, wherein the chamber bore has a chamber diameter smaller than the piston bore diameter;
• and
• first and second open annular scraper grooves located on opposite ends of the chamber bore;
• a first set of pistons each positioned in a respective one of the first piston bores and connected to a first crankshaft;
• and
• a second set of pistons each positioned in a respective one of the second piston bores and connected to a second crankshaft.