Abstract: A cast piston for an internal combustion engine is made of an iron-based material and has windows in at least one side wall carrying a piston pin boss. The windows are asymmetric relative to one another on the side of the skirt walls.

Abstract: A method for producing a piston blank or a piston for an internal combustion engine, includes providing a thickened portion formed in at least one box wall in the direction of thickness approximately in the center thereof, which is at least partly flush with a cooling channel. A resulting piston blank or piston having these features can be made in a casting mold or forging die designed in a corresponding manner.

Abstract: A piston (10) for an internal combustion engine includes a groove (16) for an oil wiper ring and a recess (18) between the groove (16) and at least one shaft wall (20). A lower edge of the groove (16), which is closer to the shaft wall (20), has a larger diameter than a lower edge of the recess (18).

Abstract: A diesel engine piston is cast in one piece and consists of almost fully pearlitic cast iron with spheroidal graphite as the piston material. Such a piston is used for “light vehicle” diesel engines, “heavy duty” diesel engines and “large bore” diesel engines.

Abstract: The invention relates to a method for producing an engine component, in particular a piston for an internal combustion engine, wherein an aluminum alloy is cast in the gravity die casting process and wherein the aluminum alloy has 7 to <14.5 wt % silicon, >1.2 to ?4 wt % nickel, >3.7 to <10 wt % copper, <1 wt % cobalt, 0.1 to 1.5 wt % magnesium, 0.1 to ?0.7 wt % iron, 0.1 to ?0.7 wt % manganese, >0.1 to <0.5 wt % zirconium, ?0.1 to ?0.3 wt % vanadium, 0.05 to 0.5 wt % titanium, and 0.004 to ?0.05 wt % phosphorus as alloying elements and aluminum and unavoidable contaminants as the remainder. The aluminum alloy can optionally comprise beryllium, wherein the calcium content is limited to a low level.

Abstract: A piston for an internal combustion engine has box walls (18), which are each formed between skirt walls (12) and gudgeon pin bosses (10). At least one of the box walls (18) on a thrust side at least on the lower edge and at least on the inner side, starting from the gudgeon pin boss (10), in a first portion (20), runs largely straight and is inclined outwards, and then runs curved inwards, and then, in a second portion (16), runs largely straight and inclined inwards to the skirt wall (12).

Abstract: A coating composition for the piston of an internal combustion engine comprises 10-30 wt. % of phenolic resin, 10-30 wt. % of epoxy resin, 10-30 wt. % of at least one solid lubricant selected from the group consisting of graphite, MoS2, WS2 and BN, and 5-30 wt. % of Fe2O3 particles.

Abstract: A steel piston (10) for an internal combustion engine has a cooling channel and shaft surfaces (12, 14) with which the piston (10), in the installed state, abuts a cylinder bore or a cylinder liner on a pressure side and a counterpressure side, wherein one shaft surface (12) has a width which is 25-50% smaller than the other shaft surface (14).

Abstract: The invention relates to a piston for an internal combustion engine having two skirt wall (10), which are connected by connecting walls (14), which bear piston-pin bosses, wherein at least one skirt wall (10) has a greater wall thickness in a region (12) that is central along the piston periphery and in the lateral regions than between the central region (12) and each lateral region and is continuously curved on the inside of the piston in a section perpendicular to the piston axis, and wherein the wall thickness distribution is substantially constant in the direction of the piston axis.

Abstract: A steel piston (10) for an internal combustion engine comprises a ring zone (12), a shaft (14), openings (16) between the ring zone (12) and shaft (14) which extend from the piston outer side to the piston inner side, and, between two openings (16), a rib (18) which is substantially central with respect to a length of a piston pin to be received, wherein, when viewed in the circumferential direction, the rib (16) has a decreasing thickness from the middle thereof, as measured in the radial direction.

Abstract: In a method for producing a piston (10) for an internal combustion engine, a melt treatment is performed at least in regions in particular in the region of a combustion chamber depression (14), the depth of said melt treatment being varied in the circumferential direction.

Abstract: The invention relates to a piston (10) for an internal combustion engine, comprising a piston crown (22), a cylindrical piston head (11), which adjoins the piston crown (22), and an at least partially hollow piston skirt (40), which is formed on the piston head (11) on the side facing away from the piston crown (22) and which has two opposite skirt wall segments (50) and two opposite connecting walls (60) that connect the skirt wall segments (50), wherein the connecting walls (60) each have a pin bore (61), wherein the piston head (11) has an annular cooling channel (18), which has at least one inlet opening (28) and at least one outlet opening (30), and the two skirt wall segments (50) widen toward the piston head (11) in such a way that the sector length (L1) of the side of the skirt wall segment (50) formed on the piston head (11) is greater than the sector length (L2) of the side of the skirt wall segment (50) facing away from the piston head (11).

Abstract: The invention relates to a piston for an internal combustion engine, having shaft wall sections on the pressure and counter-pressure side, and connecting walls between the shaft wall sections. The connecting walls are arched on the counter-pressure side, and the connecting walls are largely straight on the pressure side, such that the counter-pressure side is more elastic that the pressure side.

Abstract: A method is described for producing an engine component, more particularly a piston for an internal combustion engine, in which an aluminium alloy is cast using the gravity die casting method and wherein the aluminium alloy comprises the following alloy elements: 9 to ?10.5% by weight silicon, >2.0 to <3.5% by weight nickel, >3.7 to 5.2% by weight copper, <1% by weight cobalt, 0.5 to 1.5% by weight magnesium, 0.1 to 0.7% by weight iron, 0.1 to 0.4% by weight manganese, >0.1 to <0.2% by weight zirconium, >0.1 to <0.2% by weight vanadium, 0.05 to <0.2% by weight titanium, 0.004 to 0.008% by weight phosphorus, wherein said aluminium alloy further comprises aluminium and unavoidable impurities.

Abstract: A piston (10) for an internal combustion engine has discrete, cylindrical support surfaces (18, 24) for supporting a piston pin, wherein, between at least two support surfaces (18, 24), there is provided a recess (26) which has a radial depth of at least 10% of half of the distance between two opposite support surfaces.

Abstract: A piston coating is described that comprises a phenolic resin, at least one solid lubricant selected from among the group including graphite, MoS2, WS2, BN, and PTFE, as well as carbon fibers. Said coating has an advantageous wear resistance and an advantageous coefficient of friction.

Abstract: A piston for an internal combustion engine comprises at least one cooling channel located only in the areas of at least one inflow and at least one outflow at a low level comparatively removed from the base of the piston and at a constant higher level closer to the piston base, said cooling channel comprising steep inclines between the areas located at the low and at the high level.

Abstract: The invention relates to a piston (10) for an internal combustion engine, comprising a piston crown (22), a cylindrical piston head (11), which adjoins the piston crown (22), and an at least partially hollow piston skirt (40), which is formed on the piston head (11) on the side facing away from the piston crown (22) and which has two opposite skirt wall segments (50) and two opposite connecting walls (60) that connect the skirt wall segments (50), wherein the connecting walls (60) each have a pin bore (61), wherein the piston head (11) has an annular cooling channel (18), which has at least one inlet opening (28) and at least one outlet opening (30), and the two skirt wall segments (50) widen toward the piston head (11) in such a way that the sector length (L1) of the side of the skirt wall segment (50) formed on the piston head (11) is greater than the sector length (L2) of the side of the skirt wall segment (50) facing away from the piston head (11).

Abstract: In a process for producing a piston for an internal combustion engine, a groove is worked into a cast piston blank proceeding from a combustion chamber cavity (20) in a largely radial direction and then closed to form a cooling duct. A cast piston for an internal combustion engine has a closure which is fitted after the casting and the machining between the cooling duct and a combustion chamber cavity (20).

Abstract: A piston for an internal combustion engine includes a mostly linearly displaceable sleeve for forming at least one piston pin bore and at least one slider that can be displaced at least mostly linearly and diagonally to the sleeve for forming at least one recess under a ring zone of the piston. The sleeve and the slider are at least indirectly coupled, such that the sleeve at least partially carries the slider when displaced. A method for opening and/or closing a casting device for a piston for an internal combustion engine, wherein a mostly linearly displaceable sleeve at least partially carries a slider that can be displaced mostly linearly and diagonally to the sleeve.