{
  "$type": "site.standard.document",
  "description": "A piston (100) for an internal combustion engine includes a piston (100) body forming a crown portion (102) and a skirt portion (104). The skirt portion (104) includes a bore that receives a pin for connecting the piston (100) to a connecting rod, and the crown portion (102) forms a bowl (110)…",
  "path": "/patents/942675",
  "publishedAt": "2016-05-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B23/06",
    "CATERPILLAR INC [US]"
  ],
  "textContent": "A piston (100) for an internal combustion engine includes a piston (100) body forming a crown portion (102) and a skirt portion (104). The skirt portion (104) includes a bore that receives a pin for connecting the piston (100) to a connecting rod, and the crown portion (102) forms a bowl (110) surrounded by a flat crown surface (112) having an annular shape and disposed along a plane. The bowl (110) and the flat crown surface (112) meet along a circular edge surrounding a rim (212) of the bowl (110). The piston (100) further includes an annular protrusion (216) disposed within the bowl (110) adjacent the rim (212). The annular protrusion (216) has a generally convex shape in cross section created by an upper, inwardly extending surface (220) and a lower, inwardly extending surface (220) that meet along a convex apex (306). The piston (100) further includes an airfoil surface (200) formed in the flat crown surface (112). The airfoil surface (200) has a convex shape and extends annularly around the rim (212) of the bowl (110).",
  "title": "ENGINE PISTON"
}