Abstract: A drive unit and a drive assembly and a motor vehicle. The drive unit includes a first electric machine and a second electric machine and an output shaft, wherein a rotor of the second electric machine is connected to the output shaft for conjoint rotation. The drive unit further includes a disconnect clutch by which a rotor of the first electric machine can be connected to the output shaft. The drive unit further includes power electronics for controlling at least one of the two electric machines and a flow system for implementing a flow of a coolant, and the drive unit, being a component in the flow system, further includes a heat exchanger by which the coolant can be cooled. The drive unit and the drive assembly constitute equipment that allows control of individual assemblies in an efficient manner and with a low space requirement.

Abstract: The invention relates to a sheet steel (1) coated with a zinc-based coating and skin-pass rolled with a deterministic surface structure (2), and to a method for producing it.

Abstract: The invention relates to a sheet steel (1) coated with a zinc-based coating and skin-pass rolled with a deterministic surface structure (2), and to a method for producing it.

Abstract: A power electronics unit for an electric motor of a motor vehicle drive, having a plate-like cooling element, at least one semiconductor module and a module holder which consists of plastic and secures the at least one semiconductor module relative to the cooling element. The module holder is fixed to the cooling element via an interlocking snap connection.

Abstract: Piston (1) of an internal combustion engine, which piston is designed in structured construction, comprising two oppositely arranged load-bearing skirt wall portions (2), wherein a connecting wall (3) respectively extends, starting from a pin boss (4), in the direction of the side edge of the load-bearing skirt wall portions (2), characterized in that in an interior of the piston (1) is (are) disposed at least one rib (5, 6, 7), preferably three ribs (5, 6, 7), and the material of the regions around the at least one rib (5, 6, 7) is reduced.

Abstract: A power electronics unit for an electric motor of a motor vehicle drive, having a plate-like cooling element, at least one semiconductor module and a module holder which consists of plastic and secures the at least one semiconductor module relative to the cooling element. The module holder is fixed to the cooling element via an interlocking snap connection.

Abstract: A drive unit and a drive assembly and a motor vehicle. The drive unit includes a first electric machine and a second electric machine and an output shaft, wherein a rotor of the second electric machine is connected to the output shaft for conjoint rotation. The drive unit further includes a disconnect clutch by which a rotor of the first electric machine can be connected to the output shaft. The drive unit further includes power electronics for controlling at least one of the two electric machines and a flow system for implementing a flow of a coolant, and the drive unit, being a component in the flow system, further includes a heat exchanger by which the coolant can be cooled. The drive unit and the drive assembly constitute equipment that allows control of individual assemblies in an efficient manner and with a low space requirement.

Abstract: Piston (1) of an internal combustion engine, which piston is designed in structured construction, comprising two oppositely arranged load-bearing skirt wall portions (2), wherein a connecting wall (3) respectively extends, starting from a pin boss (4), in the direction of the side edge of the load-bearing skirt wall portions (2), characterized in that in an interior of the piston (1) is (are) disposed at least one rib (5, 6, 7), preferably three ribs (5, 6, 7), and the material of the regions around the at least one rib (5, 6, 7) is reduced.

Abstract: A method of activating a metal surface, such as a galvanized steel sheet, before a phosphating process, may involve bringing the metal surface into contact with an activating bath containing activating particles, which may be based on phosphate and/or titanium, dispersed in water. To alleviate or even eliminate the problems of poor adhesion of surface coatings to preferably electrolytically galvanized, phosphated metal strip, an additive that suppresses or at least slows agglomeration of the activating particles may be added to the activating bath. In some examples, polyethylene glycol (PEG) and/or sodium stearate may be added. Further, the particle size distribution of the activating particles present in the activating bath may be determined and the activating bath may be replaced or taken out of operation as a function of the particle size distribution of the activating particles.

Abstract: A piston for an internal combustion engine including an outer part and an inner part. The outer part includes a ring groove region and a piston skirt. The inner part includes a piston boss and pin bores. The inner part is inserted into the outer part and engages the outer part at a joint in at least one vertically-oriented plane. The inner part and the outer part are non-detachably joined at the joint forming a one-piece piston.

Abstract: A method for producing a cooling duct piston for an internal combustion engine having a cooling duct in its piston crown. A piston main body is produced with a collar which is circumferential and projects radially in the region of the piston crown. The collar is formed until its outer circumferential edge comes very closely or completely into contact with a bearing region of the piston lower part forming the cooling duct. At least one ring groove is introduced. A ring-free groove is further formed below the ring groove, wherein a dividing plane lies between the outer circumferential edge of the formed collar and an upper side of the piston lower part in the ring-free groove.

Abstract: Method for producing a piston having a cooling channel produced by a lost core casting process. A lost core extends into a casting mold which forms the inner region of the piston blank. The lost core is used to form at least one opening having a rounded profile in communication with the cooling channel. A jet splitter may be formed in the cooling duct to divert injected cooling oil into the cooling duct.

Abstract: A method of activating a metal surface, such as a galvanized steel sheet, before a phosphating process, may involve bringing the metal surface into contact with an activating bath containing activating particles, which may be based on phosphate and/or titanium, dispersed in water. To alleviate or even eliminate the problems of poor adhesion of surface coatings to preferably electrolytically galvanized, phosphated metal strip, an additive that suppresses or at least slows agglomeration of the activating particles may be added to the activating bath. In some examples, polyethylene glycol (PEG) and/or sodium stearate may be added. Further, the particle size distribution of the activating particles present in the activating bath may be determined and the activating bath may be replaced or taken out of operation as a function of the particle size distribution of the activating particles.

Abstract: In the case of an endoscope 1, it is provided to arrange in an endoscope tip 3 at a distal end 2 of the endoscope 1 an imaging optic 4 and an image receiving sensor 5 in an interior space 8 defined by a metal foil 7.

Abstract: In a printed circuit board (10), in which at least one signal conductor (13) runs through a dielectric comprising at least one dielectric layer (12, 15), an improved signal integrity in conjunction with simplified producability which is more flexible with regard to the layout is achieved by virtue of the fact that, for electrical radio-frequency screening, the at least one signal conductor (13) is surrounded by a plurality of electrically conductive holes (18), which are spaced apart from one another.