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US 10,774,729 B2Granted
Compression self-ignited internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorIsamu Goto
Life of this patent
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Abstract
A porous alumina layer with a sealer (i.e., a coating layer) is formed on a top surface or a piston (i.e., a second cavity surface and a second squish surface) and a surface of a bottom surface of a cylinder which forms a cavity area CA (i.e., a first cavity surface). The porous alumina layer without the sealer (i.e., an exposed layer) is formed on a surface of the bottom surface which forms a squish area SA (i.e., a first squish surface).
Claims5
A compression self-ignited internal combustion engine, comprising:
- a top surface of a piston on which a cavity is formed;
- a bottom surface of a cylinder head which faces to the top surface;
- a first heat shielding layer which includes porous alumina and is formed on the bottom surface of the cylinder head;
- and
- a second heat shielding layer which includes porous alumina and is formed on the top surface of the piston,
- wherein the first heat shielding layer, which is formed on the bottom surface of the cylinder head, includes:
- a first coating layer in which openings of pores of the porous alumina are covered with a sealant;
- and
- a first exposing layer in which the openings are not covered with the sealant,
- wherein the first coating layer is formed on a first cavity surface of the bottom surface of the cylinder head which forms a cavity area with the surface of the cavity, and
- wherein the first exposing layer is formed on a first squish surface of the bottom surface of the cylinder head which forms a squish area with the top surface of the piston on an outside of the first cavity surface.
8 more elements
Dependencies are inferred from the claim text.