Abstract: A rotor device (1) for an electric machine (10) has a rotatably supported shaft (2) and a rotor hub (3) connected to the shaft (2) in a rotationally fixed manner. The shaft (2) has multiple radially outwardly facing shaft protrusions (12), and the rotor hub (3) has multiple radially inwardly facing hub protrusions (13). A shaft protrusion (12) and a respective hub protrusion (13) abut one another in a touching manner in the radial direction at least in sections. Cavities (4) are formed between the rotor hub (3) and the shaft (2). The cavities (4) extend between adjacent shaft protrusions (12) and the hub protrusions (13) lying thereon. The cavities (4) are grouted with a material (14). The material (14) forms form-fit elements (24) that block relative movement of the rotor hub (3) and the shaft (2) in a form-fit manner.

Abstract: A rotor (1) of an electric motor (20) has a rotor body (21) with a rotor shaft receptacle opening (22) for receiving a rotor shaft (3), and a rotor sheath (23) is on the rotor body (21) outward of the rotor shaft receptacle opening (22). Magnetic field-inducing components (10) are arranged in the rotor body (21). The rotor body (21) further has first and second end faces (14, 18) facing away from one another. The rotor (1) also includes a cooling device (4) with a supply channel (5), a drainage channel (6) and cooling channels (11) formed in the rotor body (21) between the rotor shaft receptacle opening (22) and the rotor sheath (23). The cooling channels (11) are arranged adjacent to the magnetic field-inducing components (10). A method for manufacturing a rotor having a cooling device also is provided.

Abstract: A method is provided for manufacturing a rotor (1) of an electric motor. The rotor (1) has a rotor shaft (2), inner sheet metal packets (4), outer sheet metal packets (4), buried magnets (5) arranged in the assembled state between the inner sheet metal packets (3) and the outer sheet metal packets (4), and surface magnets (6) arranged in the assembled state on the outer sheet metal packets (4). The method includes pushing the inner sheet metal packets (3) onto the rotor shaft (2) to achieve alignment rectangularly and coaxially. The rotor (1) is constructed by placing the buried magnets (5) and the outer sheet metal packets (4) on the inner sheet metal packets (3) and the surface magnets (6) on the outer sheet metal packets (4). A total run-out of the rotor (1) thus is set to a predetermined acceptable amount.

Abstract: A method for producing a rotor device, including providing a rotor shaft having at least one sheet metal packet joined to the rotor shaft. The at least one sheet metal packet includes magnetic units. The method includes performing a transfer molding process, in which the magnetic units are fixed in position in relation to the at least one sheet metal packet and at least one balancing disk is joined axially on the rotor shaft on at least one side of the at least one sheet metal packet such that a gap of a defined width is ensured between the at least one balancing disk and the at least one sheet metal packet. The gap is filled with a molding compound used for the transfer molding process. The method includes determining an imbalance of the rotor device and compensating the imbalance by removing material from the at least one balancing disk.

Abstract: An electrical machine including a rotor and a stator occupying a substantially hollow-cylindrical spatial region, the stator including a stator core with a stator winding and fluid ducts which extend in an axial direction from a first axial side to an opposite second axial side, wherein a fluid-distributing chamber with a coolant inflow is provided on the first axial side, the coolant inflow communicates with the fluid-distributing chamber and the fluid-distributing chamber communicates with the fluid ducts, a fluid-collecting chamber with a coolant outflow is provided on the second axial side, the fluid-collecting chamber communicates with the coolant outflow and the fluid-collecting chamber collects the coolant, the coolant inflow is arranged on the first axial side on a first circumferential side and the coolant outflow is arranged on the second axial side, a bypass duct is provided, and the fluid inlet is arranged on the second axial side.

Abstract: A subframe (1) in a body of a motor vehicle is provided for connecting longitudinal and cross members for wheels (12) of an axle of the motor vehicle. A region (2) of the subframe (1) is designed as a supporting ring (3) for holding an electric energy accumulator (4). The subframe achieves a structurally simple and stable holding of an electric energy accumulator in the motor vehicle.

Abstract: Described is a method for producing a stator, in particular for electric motors. In a first step, a plurality of flexible electrical conductors are combined to form a conductor bundle. In a second step, two end regions of the conductor bundle are pressed in such a way that a central region of the conductor bundle formed between the two end regions remains flexible. Also described is a corresponding stator.

Abstract: A coil segment, in particular for a stator coil, wherein the coil segment has a conductor bundle, wherein the conductor bundle has a multiplicity of electrical conductors, wherein the conductor bundle has a form fit, wherein the conductor bundle has at least one cutout for feeding coolant. Furthermore, a method for manufacturing a stator coil, a stator coil having a coil segment according to the present invention, a machine having a stator coil according to the present invention, and a vehicle having a machine according to the present invention.

Abstract: A subframe (1) in a body of a motor vehicle is provided for connecting longitudinal and cross members for wheels (12) of an axle of the motor vehicle. A region (2) of the subframe (1) is designed as a supporting ring (3) for holding an electric energy accumulator (4). The subframe achieves a structurally simple and stable holding of an electric energy accumulator in the motor vehicle.

Abstract: A drive train (6) is provided for a motor vehicle which can be driven in a purely electric manner. A gear mechanism (7, 15) has a standardized housing (8) for accommodating an electrical machine (16) or two electrical machines (10, 11) and for accommodating two gear mechanism output shafts (9) which are associated with a vehicle axle (2, 4). A large number of drive topologies for various vehicle sectors with purely electric drives can be formed by configuring the drive train in this way.

Abstract: A coil segment, in particular for a stator coil, wherein the coil segment has a conductor bundle, wherein the conductor bundle has a multiplicity of electrical conductors, wherein the conductor bundle has a form fit, wherein the conductor bundle has at least one cutout for feeding coolant. Furthermore, a method for manufacturing a stator coil, a stator coil having a coil segment according to the present invention, a machine having a stator coil according to the present invention, and a vehicle having a machine according to the present invention.

Abstract: Described is a method for producing a stator, in particular for electric motors. In a first step, a plurality of flexible electrical conductors are combined to form a conductor bundle. In a second step, two end regions of the conductor bundle are pressed in such a way that a central region of the conductor bundle formed between the two end regions remains flexible. Also described is a corresponding stator.

Abstract: A method for controlling an internal combustion engine operating on at least partly gaseous fuel is disclosed. The method may include providing a desired burn rate profile corresponding to a desired operation of the internal combustion engine. The method may further include selecting first operating parameters such that an operation of the internal combustion engine with a first gas composition produces a first burn rate profile that corresponds to the desired burn rate profile. The method may also include operating the internal combustion engine with the first operating parameters using a second gas composition. The method may include determining that the second burn rate profile differs from the desired burn rate profile. In addition, the method may include adjusting an operating parameter from among the first operating parameters of the internal combustion engine to approach the desired burn rate profile.

Abstract: A piston top structural unit for an internal combustion engine may include a piston crown structure providing a top surface and a peripheral surface, wherein, regarding a center axis of the piston, the top surface is configured to delimit the piston top structural unit axially with respect to a combustion chamber of the internal combustion engine and the peripheral surface is configured to delimit the piston top structural unit radially. The top surface may include a rim surface extending around the center axis, and an inner surface delimiting a piston bowl radially within the peripheral surface.

Abstract: A control system is disclosed for operating an internal combustion engine. The control system includes a control unit configured for providing a part load mode that is optimized for slow operation of the engine at loads up to an upper part load limit in the range from 40% to 75% of a maximum engine load. The control unit is also configured for providing a high load mode for engine loads above the upper part load limit. In the part load mode, at least one inlet valve is closed at a closing angle later than in the high load mode.

Abstract: A method for controlling an internal combustion engine operating on at least partly gaseous fuel is disclosed. The method may include providing a desired burn rate profile corresponding to a desired operation of the internal combustion engine. The method may further include selecting first operating parameters such that an operation of the internal combustion engine with a first gas composition produces a first burn rate profile that corresponds to the desired burn rate profile. The method may also include operating the internal combustion engine with the first operating parameters using a second gas composition. The method may include determining that the second burn rate profile differs from the desired burn rate profile. In addition, the method may include adjusting an operating parameter from among the first operating parameters of the internal combustion engine to approach the desired burn rate profile.

Abstract: A method for balancing a plurality of cylinders during operation of an internal combustion engine having a plurality of gas admission valves includes operating the internal combustion engine with a first common ignition timing for each of a plurality of cylinders. While operating with the first common ignition timing, a cylinder having an above-average knock level is determined, and an opening duration of the gas admission valve associated with this cylinder is reduced. This is repeated until the knock levels for all cylinders differ from each other by less than a predetermined amount. When the knock levels for all cylinders differ by less than the predetermined amount, the first common ignition timing is advanced to a second ignition timing.

Abstract: A control system is disclosed for operating an internal combustion engine. The control system includes a control unit configured for providing a part load mode that is optimized for slow operation of the engine at loads up to an upper part load limit in the range from 40% to 75% of a maximum engine load. The control unit is also configured for providing a high load mode for engine loads above the upper part load limit. In the part load mode, at least one inlet valve is closed at a closing angle later than in the high load mode.

Abstract: A subframe (1) in a body of a motor vehicle is provided for connecting longitudinal and cross members for wheels (12) of an axle of the motor vehicle. A region (2) of the subframe (1) is designed as a supporting ring (3) for holding an electric energy accumulator (4). The subframe achieves a structurally simple and stable holding of an electric energy accumulator in the motor vehicle.

Abstract: A drive train (6) is provided for a motor vehicle which can be driven in a purely electric manner. A gear mechanism (7, 15) has a standardized housing (8) for accommodating an electrical machine (16) or two electrical machines (10, 11) and for accommodating two gear mechanism output shafts (9) which are associated with a vehicle axle (2, 4). A large number of drive topologies for various vehicle sectors with purely electric drives can be formed by configuring the drive train in this way.