Abstract: An optical system includes a substrate. An image sensor is on the substrate. The image sensor has an image plane. A lens barrel defines a mechanical axis that intersects the image sensor and image plane. The lens barrel has a first coefficient of thermal expansion (CTE). A lens mount is integrally formed with the lens barrel. The lens mount is connected to the substrate. The lens mount has a second CTE. At least one lens element is in the lens barrel on the mechanical axis and defines an optical axis. A last powered optical surface of the at least one lens element is spaced along the optical axis from the image plane by a back focal length. At least one of the first and second CTEs limiting a change in the back focal length as a result of a change in temperature of the optical system.

Abstract: A motor vehicle transmission (1) has a drive input shaft (15), a drive output shaft (16), a first planetary gearset (P1), and a second planetary gearset (P2). The drive input shaft (15) is provided for coupling to a drive machine. In addition, a first shifting element (A) and a second shifting element (B) are provided, at least functionally. Also disclosed is a drive unit (5), a motor vehicle drivetrain, a hybrid or electric vehicle, and a method for operating a motor vehicle transmission.

Abstract: A method is provided for operating an actuator of a steer-by-wire steering system of a motor vehicle in a speed range from standstill to parking and/or maneuvering. In one example, the method includes detecting an instantaneous speed of the motor vehicle, determining a limited steering angle as a function of at least the instantaneous speed, detecting a steering angle demand, and activating an actuator for setting a steering angle of at least one wheel, at least as a function of the steering angle demand and having regard to the limited steering angle.

Abstract: A semiconductor power module for an electrical axle drive in an electric vehicle and/or a hybrid vehicle includes a plurality of semiconductor switching elements for generating an output current on the basis of an input current provided by a voltage source by switching the semiconductor switching elements comprising a plurality of diodes which each have an anode and a cathode, a first leadframe, and a second leadframe having a plurality of conductor tracks for electrically connecting the semiconductor switching elements to form a half-bridge having a high side and a low side, wherein the first leadframe is assigned to the high side and the second leadframe is assigned to the low side, wherein electrical contact is made with the diodes between the first leadframe and the second leadframe so that the anode of the diodes faces a cooler mechanically connected and thermally coupled to the semiconductor power module.

Abstract: A motor vehicle transmission (1) has a drive input shaft (15), a drive output shaft (16) and a first planetary gearset (P1), and a second planetary gearset (P2), where the drive input shaft (15) is provided for coupling to a drive machine. In addition, a first shifting element (A) and a second shifting element (B) are provided, at least functionally. Also disclosed are a drive unit (5), a motor vehicle drivetrain, a hybrid or electric vehicle, and a method for operating a motor vehicle transmission.

Abstract: A vehicle powertrain has a first electrical machine with first power electronics and a second electrical machine with second power electronics. In symmetrical operation, the first and second electrical machines are loaded or operated with the same torque and with the same torque gradient. In a non-symmetrical operation, the first and second electrical machines are loaded or operated with a different torque and/or with a different torque gradient. If, after non-symmetrical operation the symmetrical operation is resumed, a subsequent modified operation can be used in which the electrical machine that was loaded or operated in non-symmetrical operation with higher torque and/or a higher torque gradient, is loaded or operated with a limited torque and/or with a limited torque gradient or is switched off or decoupled for a defined period of time, thereby at least partially compensating for a different aging of the electrical machines due to non-symmetrical operation.

Abstract: A method is provided for operating an actuator of a steer-by-wire steering system of a motor vehicle at speeds from a standstill up to parking and/or maneuvering speeds. The method includes detecting an instantaneous steering angle of at least one wheel on an axle of the motor vehicle, detecting a steering angle demand, determining a limit value of an acceleration of a drive mechanism of the actuator at least as a function of the instantaneous steering angle, and activating the actuator for setting a steering angle of at least one wheel as a function of the steering angle demand and using the limit value of the acceleration.

Abstract: A circuit configuration includes a voltage surge protector that is connected in parallel to the link capacitor to protect the link capacitor from voltage overloads. A printed circuit board assembly, an electric axle drive, and a motor vehicle are also disclosed.

Abstract: An inverter includes at least one phase and two driver boards situated opposite each other, and at least one half-bridge, arranged between the driver boards and contacted electrically and/or by signals, with, in each case, a semiconductor package formed as a high-side switch and a semiconductor package arranged parallel thereto and formed as a low-side switch. A heat sink in the region of the half-bridges and connected to a cooling attachment under each semiconductor package, wherein the heat sink has a split design so that a first cooling branch is arranged in the high-side branch and a second cooling branch is arranged in the low-side branch, wherein the cooling branches are arranged at a distance from each other, and the cooling branches are fluidically interconnected in parallel or in series in a region outside the arrangement of the semiconductor packages.

Abstract: A vehicle powertrain features a first electrical machine with first power electronics, a second electrical machine with second power electronics, and a transmission connected between the electrical machines and an output. To execute a powershift, the first and second electrical machines are operated so that one of the electrical machines is used as the main drive machine, and the other electrical machine is used for tractive force support during the execution of the powershift. When a temperature of at least one of the electrical machines and/or of at least one of the power electronics exceeds a temperature limit value, and/or when a target electric current flowing through at least one of the electrical machines and/or at least one of the power electronics exceeds a current limit value, a powershift is adapted to limit heating of the respective electrical machine and/or the respective power electronics.

Abstract: A vehicle powertrain has a first electrical machine with first power electronics, a second electrical machine with second power electronics, and a transmission connected between the electrical machines and an output. In symmetrical operation, the first and the second electrical machine are operated with an equal torque and torque gradient. When executing a shift non-symmetrical operation, the first and the second electrical machines are operated with different torque and/or torque gradient. During a symmetrical operation if it is detected that a shift with a non-symmetrical operation is to be executed, the symmetrical operation is exited prior to executing the shift to provide a mode in which the electrical machine operated with higher torque and/or torque gradient, is operated with limited torque and/or torque gradient to reduce a temperature of the electrical machine and the associated power electronics operated with a higher torque and/or torque gradient.

Abstract: A wind turbine transmission including a first planetary stage and a second planetary stage, wherein a sun gear of the first planetary stage and a planet carrier of the second planetary stage are interconnected for conjoint rotation by means of a spline joint, the sun gear integrally forms an internal toothing, and a first web of the planet carrier or a sun shaft integrally connected to the first web integrally forms an external toothing of the spline joint.

Abstract: A vehicle transmission includes a hydraulic circuit and a control unit. The control unit is configured to: obtain (20) a target pressure specification; convert (26) the target pressure specification into a target volume flow rate; determine (42) a valve volume flow rate as a function of the target volume flow rate and as a function of parameters that represent system properties of the hydraulic circuit; determine (46) a pressure drop at a valve due to flow forces as a function of the valve volume flow rate; determine (48) a compensated valve output pressure as a function of the valve volume flow rate and the pressure drop; determine (58) the electric control current as a function of the compensated valve output pressure; and activate a valve with the electric control current.

Abstract: A gear unit has a differential that comprises two planetary gearsets, a first gearset element of the first planetary gearset is connected to an input shaft and a second gearset element of the first planetary gearset is connected to a first output shaft. A third gearset element of the second planetary gearset is connected to a second output shaft. A first output torque is transmittable to the first output shaft by the first planetary gearset. A reaction torque of the first planetary gearset is transmittable to the second output shaft. Between the first output shaft and second output shaft is an actuation mechanism having a first friction partner and a second friction partner. The friction partners generate a connection between the two output shafts when the actuation mechanism is actuated.

Abstract: A clutch arrangement is provided with a clutch housing that connects a drive unit to an output, such as a transmission, which is rotatable around a central axis and with which an axial central projection is associated at the side of the clutch housing facing the drive unit in the radial extension area of its rotational center. The axial central projection receives a rotor carrier receiving a rotor of an electric machine. The central projection is connected at least so as to be fixed with respect to relative rotation to the drive unit via a first connection device and to the rotor carrier via a second connection device.

Abstract: A method helps to protect an occupant of a vehicle (10) equipped with an automated driving system (200) and a vehicle safety system (100) by detecting low impact crash events (99) with the vehicle (10). The method includes utilizing automated driving sensors (220, 230, 240, 250, 260) of the automated driving system (200) to identify possible low impact collision risks. The method also includes utilizing vehicle safety system sensors (110, 115, 120, 125, 130) of the vehicle safety system to determine a low impact collision resulting from the identified possible low impact collision. A vehicle safety system (100) includes an airbag controller unit (150) configured to implement the method to determine low impact crash events with the vehicle (10).

Abstract: Disclosed is method for operating a multi-gear vehicle transmission having a plurality of shifting elements (A, B, C, D, E) for engaging gears of the vehicle transmission. In a neutral gear a transmission input (1) and a transmission output (2) of the vehicle transmission are decoupled from one another. In a driving gear the transmission input (1) and the transmission output (2) of the vehicle transmission are coupled with one another by closing the shifting elements (A, B, C, D, E) associated with the driving gear in order to propel the vehicle. When the neutral gear is engaged, a transmission condition is determined, and if a transmission condition with elevated drag losses exists, then in addition to the shifting elements (A, B, C, D, E) of a driving gear, at least one further shifting element (A, B, C, D, E) of the vehicle transmission is closed.

Abstract: A rotor (1) for an electric machine (2) includes at least one sensor element (3) configured for detecting condition variables of the rotor (1), a signal processing unit (4) connected to the at least one sensor element (3) and configured for generating measured data from the detected condition variables of the rotor (1) and transmitting the measured data to a control device (5), and a nanogenerator (6) configured for generating electrical energy from at least one surroundings variable and supplying the at least one sensor element (3) and the signal processing unit (4) with electrical energy.

Abstract: An arrangement for liquid cooling of an electric machine with a stator and a rotor. The electric machine is enclosed over its outer circumference by a cooling jacket having an input and an output. In an installed position of the electric machine, the input is arranged spatially below a rotational axis of the rotor, and the output is arranged spatially above the rotational axis.

Abstract: Disclosed is a test rig (1) for testing vehicle tires. In one embodiment, the test rig includes a rotating drum (2) on a drum axle (3) and force pick-ups (4, 5, 6) for the determination of a radial force acting on the drum axle (3) and a lateral force acting on the drum axle (3). In one embodiment, the test rig (1) has three uniaxial force pick-ups (4, 5, 6), such that a first and a second force pick-up (4, 5) are arranged so as to determine a radial force, where a third force pick-up (6) is arranged so as to determine a lateral force, and where the first force pick-up (4) and the third force pick-up (6) are coupled. Also disclosed is a method for testing vehicle tires.