A snap-fit engine cover assembly provides multiple customized panels that cover and protect critical engine components which are revealed upon removal of engine component covers. Removing the covers from the engine block may be necessary for repairs, rebuilding, and storage of the engine block. The panels are shaped and dimensioned to substantially match the contour of the formed openings and crevices. The edges of the panels are sufficiently resilient and have recessed grooves that form a snap-fit relationship with the perimeter of the engine component openings. In addition to the snap-fit mating, the panels have fastener apertures that align with engine block apertures; thereby enabling fasteners to pass through for reinforcing the attachment of the panels over the formed openings in the engine block. A cardboard rectangular panel is also used along the sidewall of the engine block to protect against paint when painting portions of the engine block.

A snap-fit engine cover assembly provides multiple customized panels that cover and protect critical engine components which are revealed upon removal of engine component covers. Removing the covers from the engine block may be necessary for repairs, rebuilding, and storage of the engine block. The panels are shaped and dimensioned to substantially match the contour of the formed openings and crevices. The edges of the panels are sufficiently resilient and have recessed grooves that form a snap-fit relationship with the perimeter of the engine component openings. In addition to the snap-fit mating, the panels have fastener apertures that align with engine block apertures; thereby enabling fasteners to pass through for reinforcing the attachment of the panels over the formed openings in the engine block. A cardboard rectangular panel is also used along the sidewall of the engine block to protect against paint when painting portions of the engine block.

The present embodiment relates to an internal combustion engine having an anodic oxide coating formed on at least a portion of an aluminum-based wall surface facing a combustion chamber. The anodic oxide coating has a plurality of nanopores extending substantially in the thickness direction of the anodic oxide coating, a first micropore extending from the surface toward the inside of the anodic oxide coating, and a second micropore present in the inside of the anodic oxide coating; the surface opening diameter of the nanopores is 0 nm or larger and smaller than 30 nm; the inside diameter of the nanopores is larger than the surface opening diameter; the film thickness of the anodic oxide coating is 15 m or larger and 130 m or smaller; and the porosity of the anodic oxide coating is 23% or more.

The present embodiment relates to an internal combustion engine having an anodic oxide coating formed on at least a portion of an aluminum-based wall surface facing a combustion chamber. The anodic oxide coating has a plurality of nanopores extending substantially in the thickness direction of the anodic oxide coating, a first micropore extending from the surface toward the inside of the anodic oxide coating, and a second micropore present in the inside of the anodic oxide coating; the surface opening diameter of the nanopores is 0 nm or larger and smaller than 30 nm; the inside diameter of the nanopores is larger than the surface opening diameter; the film thickness of the anodic oxide coating is 15 m or larger and 130 m or smaller; and the porosity of the anodic oxide coating is 23% or more.

A process for the manufacture of a coated combustion component. The process includes spraying one or more liquid or powdered precursors into a high temperature thermal jet directed to a surface of a combustion component and forming a surface coating derived from the precursors to provide the coated combustion component. The surface coating may comprise a phosphate glass or a silicate glass. The surface coating may have a coefficient of thermal expansion from 3 to 26 ppm/K. A coefficient of thermal expansion of the combustion component may be greater than or equal to the coefficient of thermal expansion of the surface coating. The spraying may comprise solution spraying, powder thermal spraying, suspension thermal spraying, or a combination thereof.

In the specified cylinder, the heat shield film is formed on the top surface of the piston, the surface of the parachute part of the exhaust valve, and the wall surface of the exhaust port. On the other hand, in cylinder other than the specified cylinder, the heat shield film is formed only on the top surface of piston. The heat shield film is also formed on the inner wall of the exhaust manifold, the inner wall of the exhaust pipe, and the inner wall of the housing. Among the exhaust manifold, however, the heat shield film is not formed on the inner wall of the branch pipe connected to the exhaust port of the other cylinder.

In the specified cylinder, the heat shield film is formed on the top surface of the piston, the surface of the parachute part of the exhaust valve, and the wall surface of the exhaust port. On the other hand, in cylinder other than the specified cylinder, the heat shield film is formed only on the top surface of piston. The heat shield film is also formed on the inner wall of the exhaust manifold, the inner wall of the exhaust pipe, and the inner wall of the housing. Among the exhaust manifold, however, the heat shield film is not formed on the inner wall of the branch pipe connected to the exhaust port of the other cylinder.

A working piston for a reciprocating internal combustion engine having a piston head. In order to further reduce pollutant emissions, soot particle emissions and the fuel consumption of the reciprocating piston internal combustion engine, the piston head has a wave-like structure which is circular and which is arranged concentric to the longitudinal central axis of the working piston and has nanostructuring at least in regions.

A heat shielding film is formed on a surface wall constituting a combustion chamber. The heat shielding film includes a heat shielding layer and an oil repellent layer. The heat shield layer is formed on the wall surface. The heat shielding layer is composed of a material having thermal conductivity lower than base material of the combustion chamber. The oil repellent layer is formed on a surface of the heat shield layer. The oil repellent layer is composed of polyalkoxysiloxane. A contact angle of the oil repellent layer with engine oil is at least 40 degrees.

A method of spray coating a substrate is disclosed, the method comprising: a step of spray coating metal particles onto a substrate; and a step of induction heating the coating; wherein the step of induction heating comprises performing the induction heating in a vacuum.