ENGINE AND PISTON

摘要

Any one or more members of an engine, that is, a piston, a cylinder head and a valve, has a wall face disposed face-to-face to a combustion chamber, and the wall face is coated by a heat-insulation coating film. The heat-insulation coating film includes a heat-insulative layer formed on a surface of the wall face, and an inorganic-system coated-film layer formed on a surface of the heat-insulative layer. The heat-insulative layer includes a resin, and first hollow particles buried inside the resin and exhibiting an average particle diameter being smaller than a thickness of the heat-insulative layer. The inorganic-system coated-film layer includes an inorganic compound.

主权项

1. An engine equipped with a cylinder block having a bore; a piston fitted into said bore to be capable of reciprocating therein so as to form a combustion chamber therein; a cylinder head having a valve bore closing said combustion chamber and communicating with said combustion chamber; and a valve opening and closing said valve bore;
any one or more members of said piston, said cylinder head and said valve having a wall face disposed face-to-face to said combustion chamber, the wall face coated by a heat-insulation coating film; said heat-insulation coating film comprising: a heat-insulative layer formed on a surface of said wall face; and an inorganic-system coated-film layer formed on a surface of the heat-insulative layer; said heat-insulative layer comprising: a resin; and first hollow particles buried inside the resin and exhibiting an average particle diameter being smaller than a thickness of said heat-insulative layer; and said inorganic-system coated-film layer comprising an inorganic compound.