Abstract: A piston for an internal combustion engine may include a cooling duct having at least one feed opening. The piston may also include a feed funnel arranged within the at least one feed opening. The feed funnel may be fixed in the at least one feed opening via a blind rivet connection.

Abstract: A heat engine, in particular an ORC engine, includes a crankcase and at least one working cylinder connected to the crankcase, in which cylinder a working piston that is rigidly connected to a piston rod can be moved and the end of the piston rod facing away from the working piston is articulatedly connected to a connecting rod by crosshead running in the longitudinal direction of the piston rod. The interior of the working cylinder, which is supplied with a working medium, is separated from the interior of the crankcase, which is supplied with oil, by two walls, each of which has a sealing through-opening for the piston rod.

Abstract: The present invention relates to a method for the production of a piston (1), composed of a piston upper part (2) and a piston lower part (3), of an internal combustion engine, in which the piston upper part (2) is welded with the piston lower part (3) via a contact surface (4) and thereby a cooling duct (5), delimited therebetween, is formed. It is essential to the invention here that for the production or keeping free of an net opening (6) and/or of an outlet opening (7) of the cooling duct (5) during or immediately after the welding of the piston upper part (2) with the piston lower part (3) at least one pin (8) is held out from the piston lower part (3) in the cooling duct (5) or is pushed therein and is drawn out again after the welding process, so that a welding bead (9) occurring on the welding process does not constrict a cross-section of the net opening (6) and/or of the outlet opening (7). Hereby, the piston (1) can be produced at a comparatively favorable cost.

Abstract: A fluid cooling apparatus includes a first cooling portion have a first series of cooling elements with first cooling surfaces. A second cooling portion can have a second series of cooling elements with second cooling surfaces. The second cooling portion can be removably nested together with the first cooling portion such that the first and second cooling surfaces of respective first and second series of cooling elements can be positioned adjacent to each other with gaps therebetween to form cooling cavities for cooling fluid introduced into the cooling cavities.

Abstract: A piston cooling apparatus of an engine may include a combustion chamber formed between a piston disposed in a cylinder block and a cylinder head disposed on the cylinder block, wherein a surface area-enlarging portion is formed inside the piston on bottom surface of a crown of the piston.

Abstract: A system in an engine is provided. The system includes a piston spraying conduit including an inlet in fluidic communication with an oil reservoir, a nozzle in fluidic communication with the piston spraying conduit, the nozzle directing an oil spray toward an exterior surface of a piston positioned within a combustion chamber, and a heat pipe transferring heat from an evaporator section to the condenser section, the evaporator section coupled to the piston spraying conduit. In this way, more effective piston cooling is provided while maintaining lubrication effectiveness.

Abstract: The invention relates to a method for producing a ring support (1) with a sheet metal cooling channel welded thereon (5), which is transfused later with an aluminium melt for producing a piston. The aim of the invention is to improve the production of openings (4) for supplying and removing oil. Said openings are produced even before the transfusion of the cooled ring support. When the alfin pretreament of the cooling ring supports occurs, said cooling channel is filled with melt and emptied again during removal front the alfin bath.

Abstract: A piston pin bore cooler for cooling and lubricating a piston pin bore bushings, piston pin and connecting rod bushings, includes an oil jet, the oil jet directing a spray of lubricating oil at the underside of a crown of a reciprocating piston for cooling the crown; and a deflector formed interior to a piston skirt presenting a deflector surface, the deflector surface intersecting the spray of lubricating oil for at least a portion of the duration of a each reciprocation of the reciprocating piston and deflecting the intersected the spray of lubricating oil to cool and lubricate the bushings. An opening is provided adjacent the deflector through which the spray may pass during other portions of the reciprocation. A deflector assembly, a piston skirt, and a method of cooling and lubricating a pin and bushings are further included.

Abstract: A duct from near the top of the skirt of a two-piece piston carries lubricant to the skirt pin bore, on each side of the skirt, and lubricates the pin joint. The skirt is provided with a lubricant passage, such as from a shaker tray, to the pin bore on each side of the pin joint of the skirt, piston crown struts, and wrist pin on which a piston connecting rod is joined. Fluid sprayed against the crown descends onto the skirt and some passes through the above-mentioned lubricant ducts or passages for direct, continuous lubrication of the pin joint.