To provide a surface structure of an aluminum-based member which can further improve heat insulating properties and heat shielding properties of the aluminum-based member. In an aluminum-based member 1 containing at least a silicon composition, a porous oxide film 2 is provided on a surface of the aluminum-based member 1, and the oxide film 2 is constituted to have at least a pore 2a extending from the surface toward an inside in a thickness direction of the oxide film 2 and a void 3a present inside the silicon composition 3 extending in a direction substantially orthogonal to the thickness direction of the oxide film 2.

Provided is a grounding structure for an internal combustion engine, including a resinous body 2 configured to be fastened to an engine body 7 via a bolt 8, an electric component 5 attached to the body 2, and a conductive member 16 provided to electrically connect the electric component 5 to the bolt 8 in order to ground the electric component 5 to the engine body 7.

A cylinder block of an internal combustion engine includes a cylinder bore wall that holds a piston so as to allow the piston to reciprocate. In at least one part of the cylinder bore wall in a cylinder axial direction, the density of a layer located farther from a cylinder head is lower than the density of a layer located closer to the cylinder head in the cylinder axial direction.

Engine assemblies and methods of heating and/or cooling the engine assemblies are provided. The engine assembly has a metal liner defining a cylindrical region for receiving a piston, a polymeric composite housing disposed around at least a portion of the exterior surface of the metal liner, and a metal cylinder head. The polymeric composite housing comprises a polymer and a plurality of reinforcing fibers and at least one of: a plurality of microchannels for receiving a heat transfer fluid for heating and/or cooling the engine assembly; and at least one wire for heating the engine assembly.

A method and system for processing an engine block that includes a cylinder liner. The engine block having a first material with different coefficient of thermal expansion than a second material forming the cylinder liner. The method includes providing an insulating barrier to the cylinder liner, and quenching the engine block. The insulating barrier provides a lower cooling rate to the second material forming the cylinder liner than a cooling rate for the first material forming the engine block during the quenching.

A structural frame is provided. The structural frame includes a bottom surface, first and second cylinder block sidewall engaging surfaces, the first and second cylinder block sidewall engaging surfaces positioned above the bottom surface at a height that is above a centerline of a crankshaft support included in a cylinder block when the structural frame is coupled to the cylinder block.

A first die segment for forming an internal combustion engine block has cylindrical projections, and die core pieces disposed about the cylindrical projections. A second die segment has die core stubs positioned so as to extend between adjacent die core pieces when the segments are brought together. An engine block formed by the die segments has cylindrical bores formed by the cylindrical projections extending from the deck of the block and voids formed by the die core pieces also extending from the deck and disposed about the cylindrical bores. Pockets formed by the die core stubs extend into sides of the engine block between adjacent voids. The engine block is worked below the level of the deck to undercut each of the pockets, removing material between them and the voids to result in an interconnected water jacket extending about the cylindrical bores, while leaving the deck closed.

A buried structure of a cast-iron insert for an engine bed plate, the structure may include a body frame formed of aluminum, and a plurality of supports, wherein the cast-iron insert is integrally cast with the each of the plurality of supports to form the buried structure, and the cast-iron insert has a protruding portion which is exposed at a position supporting a thrust bearing of each of the plurality of supports.

A structural frame is provided. The structural frame includes a bottom surface, first and second cylinder block sidewall engaging surfaces, the first and second cylinder block sidewall engaging surfaces positioned above the bottom surface at a height that is above a centerline of a crankshaft support included in a cylinder block when the structural frame is coupled to the cylinder block.

The present invention is directed to a rebuildable engine casing for an internal combustion engine supporting a plurality of pistons. The engine casing forms and provides a novel oil squirter that can readily be serviced or rebuilt. The engine casing also includes a novel mechanism for separating the case members and a removable service plug for accessing the oil galleries. The present invention also provides for a rebuildable oil squirter.