{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "The reciprocating internal combustion engine such as a large diesel engine comprises a cylinder having a cylinder liner (30) and a piston (5), which is movably arranged and has a piston ring (20) at its outer surface. A material of the cylinder liner and the piston rings of the piston with respect…",
  "path": "/patents/1007322",
  "publishedAt": "2011-12-07T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02F1/004",
    "WAERTSILAE NSD SCHWEIZ AG [CH]"
  ],
  "textContent": "The reciprocating internal combustion engine such as a large diesel engine comprises a cylinder having a cylinder liner (30) and a piston (5), which is movably arranged and has a piston ring (20) at its outer surface. A material of the cylinder liner and the piston rings of the piston with respect to a wear resistance is optimally aligned on each other, where the piston rings have a coating made of chrome ceramic at a surface directed against a running surface (35) of the cylinder liner, which contains a hard phase fraction of 0.05-1.70%. The reciprocating internal combustion engine such as a large diesel engine comprises a cylinder having a cylinder liner (30) and a piston (5), which is movably arranged and has a piston ring (20) at its outer surface. A material of the cylinder liner and the piston rings of the piston with respect to a wear resistance is optimally aligned on each other, where the piston rings have a coating made of chrome ceramic at a surface directed against a running surface (35) of the cylinder liner, which contains a hard phase fraction of 0.05-1.70%. The cylinder liner consists of cast iron with hard phases embedded on the cast iron. A hard phase particle is embedded in a pearlitic matrix, has an average expansion of 10-350 mu m, and has a globular or dendritic shape. The average hardness of the hard phase particle contained in the cylinder liner is more than 1000 HV. Each piston ring consists of a ring-shaped base body made of the cast iron having lamellar graphite or vermicular graphite, and further comprises an outer coating made from the chrome ceramic. The chrome ceramic-layer of the piston rings is a chromium layer with embedded ceramic-particles.",
  "title": "Low-wear stroke piston combustion engine"
}