Carbon scraping ring with abradable coating

A carbon deposit removal device for use in a cylinder/piston assembly of an internal combustion engine, the device comprising:

• a carbon scraping ring positioned on an interior sleeve of the cylinder, the carbon scraping ring including an inner surface facing the piston with one or more piston rings;
• an abradable coating having a sufficient thickness is applied to the inner surface of the carbon scraping ring;
• and,
• wherein the thickness of the abradable coating is reduced to provide an intimate fit only between an upper portion above the one or more piston rings of the piston, the interior sleeve of the cylinder and the carbon scraping ring.

A method for preventing carbon build-up on a piston assembly, the method comprising the steps of:

• seating a piston having one or more piston rings within a cylinder sleeve of a cylinder;
• providing a carbon scraping ring having an abradable coating disposed on an inner surface thereof;
• positioning the carbon scraping ring on an inner diameter of the cylinder sleeve opposing an upper portion above the one of more piston rings of the piston;
• and,
• reducing the abradable coating to a suitable thickness through movement of the piston within the cylinder sleeve.