Abstract: A method for operating a drive train of a motor vehicle, where the drive train includes a drive aggregate, a group transmission connected between the drive aggregate and a drive output, and a separating cutch connected between the drive aggregate and the group transmission. If a speed is lower than a limit value, the separating clutch is opened and for transmission preselection one or all the other sub-transmission(s) is/are changed to a friction-force-locking condition. The separating clutch is then at least partially closed and the drive aggregate is brought to a defined rotation speed. When a friction-force-locking group transmission is required, it is checked whether a starting gearshift or a driver-desired shift for the group transmission is called for and the target rotation speed of the drive aggregate is checked. Depending on the results, the sub-transmission can be synchronized by a transmission brake or by the drive aggregate.

Abstract: A shaft grounding device (X) for the electrical grounding of a shaft (1) with respect to a housing (2) includes an electrically conductive rectangular ring (4) arranged in a rectangular groove (3) formed in the shaft (1). The rectangular ring (4) is in electrically conductive contact with the housing (2) via a metallic sleeve (5). A preloading device presses the rectangular ring (4) axially against the rectangular ring groove (3) and radially outward against the sleeve (5).

Abstract: A method is disclosed for controlling gearshifts in a transmission of a motor vehicle. Devising a shifting strategy of the gearshift takes into account the operation of a sustained-action braking device (10). To organize gearshifts in an optimum way having regard to the operation of the sustained-action braking device (10), at the beginning of the operation of the sustained-action braking device (10) it is examined with what starting criterion the operation of the sustained-action braking device (10) was initiated. Depending on the starting criterion identified, a current workload of the sustained-action braking device (10) is compared against an associated threshold value. Alternately, a gearshift is carried out directly to a lowest possible gear of the motor vehicle transmission (4). If the comparison of the current workload of the sustained-action braking device (10) exceeds the threshold value, then the shifting strategy is adapted.

Abstract: A damping valve device for a vibration damper having a piston rod includes a first damping valve which, in a first operating range, moves into an operating position allowing throughflow as the flow velocity of a damping medium increases. A second operating range having a progressive damping force characteristic is influenced by a throttle point in conjunction with a valve body. The valve body is configured as a ring element which has a variable diameter and carries out a radial closing movement in the direction of a flow guiding surface at which a defined minimum throughflow cross-section is maintained, a pressure control valve being hydraulically parallel-connected to the throttle point.

Abstract: A vehicle safety system for helping to protect a vehicle occupant in the event of a frontal collision includes a controller, one or more crash sensors for sensing a frontal collision, and an active sensor for detecting objects in the path of the vehicle. The controller is configured to implement crash discrimination metrics that detect the occurrence of a frontal collision in response to signals received from the crash sensors. The crash discrimination metrics implement thresholds for determining whether the signals received from the crash sensors indicate the occurrence of a frontal collision. The controller is configured to implement an algorithm that uses information obtained from the active sensor to detect an object in the path of the vehicle and to select the thresholds implemented in the crash discrimination metrics in response to detecting the object.

Abstract: A powertrain arrangement of a working machine, including a first and second electric motor, frame component, and transmission, the first and second electric motor being connected to the transmission for transmitting torque. The frame component forms a receiving space, in which the first and second electric motor and the transmission are accommodated. The frame component has a rear axle casing section configured to rotatably bear a universal-joint shaft connecting the transmission to a rear axle. The frame component has a top-side frame section, which is arranged adjacent to a cab floor in a vertical direction. The first and second electric motor are arranged next to each other in a transverse direction and at least partially at a same level in the vertical direction. The first and second electric motor are arranged above the rear axle casing section and below the top-side frame section in the vertical direction.

Abstract: A transmission may include an input shaft, a first output shaft, a second output shaft, a first planetary gearset, and a second planetary gearset connected to the first planetary gearset, where the planetary gearsets each comprise numerous elements. The input shaft, the two output shafts, the planetary gearsets, and their elements may be arranged and designed such that a torque input via the input shaft is converted and distributed in a defined ratio to the two output shafts, and the formation of a combined torque is prevented. At least a third element of the first planetary gearset may be connected to a first element of the second planetary gearset via a shaft for conjoint rotation.

Abstract: A device for the de-excitation of at least one rotor winding of an externally electrically excited synchronous motor has a stator current controller. The stator current controller is designed to inject a stator current value into a stator current in such a manner that a value of an Id stator current following deactivation of the synchronous motor has a predefined positive value and is higher than the Id stator current prior to deactivation.

Abstract: A boost charging control method, apparatus, and a storage medium, wherein the boost charging control method includes selecting, based on an electrical angle ? of the motor, two phase windings of a motor with top two inductance strengths as working windings. The method also includes controlling currents of the two phase windings, and setting a current of the other phase winding as zero, thereby causing the motor to generate a set torque. A boost charging control method, apparatus, and a storage medium are disclosed, which may cause a motor to generate a set torque, and reduce shaking and noise due to motor torque fluctuations.

Abstract: An electric machine with a stator, a rotor, and a fluid cooling device. The rotor is supported by a rotor shaft and a first bearing arranged at a bearing shield. The fluid cooling device has a cooling tube secured to a carrier element in fluidic communication with a fluid input and output and extends inside a recess of the rotor shaft while forming an annular space. A sealing element is provided between the rotor shaft and the carrier element, which prevents fluid passage into a spatial region of the electric machine outside of the sealing region. A second bearing is axially spaced apart from the first bearing is between the rotor shaft and a second bearing shield for supporting the rotor. The rotor core extends in a space between the first bearing and second bearing, and the recess extends inside the rotor shaft axially to the second bearing.

Abstract: A transmission (1) for a motor vehicle (2) includes a transmission housing (3) with an interior space (4) and an oil sump (6). At least one rotating transmission component (5a) is arranged in the interior space (4) of the transmission housing (3). At least one compensating tank (7) is configured for collecting oil from the interior space (4). The compensating tank (7) is fluidically connected to the oil sump (6) via at least one return (8). The particular return (8) delivers a predefined flow back into the oil sump (6) as a function of a power throughput of the transmission (1).

Abstract: A traction drive for propelling a vehicle includes first and second drive components (1, 1*) that generate heat during operation. A cooling system for tempering the drive components (1, 1*, 2, 2*) has a first cooling circuit (3), a second cooling circuit (4), and a heat exchanger (5). The heat exchanger (5) is designed to transfer heat between the first and second cooling circuits (3, 4). The first cooling circuit (3) passes through the first drive component (1, 1*) in order to temper the first drive component (1, 1*) and the second cooling circuit (4) passes through the second drive component (2, 2*) in order to temper the second drive component (2, 2*). A valve (36) is arranged in the first cooling circuit (3) for adjusting the flow of coolant from the first cooling circuit (3) through the heat exchanger (5).

Abstract: A cooling arrangement for an electric machine includes a machine housing and a stator mounted rotationally symmetrically in a radial direction around at least one rotor in the machine housing. The stator has a stator winding extending axially between opposite ends in which are located a first winding head and a second winding head. At least one spray tube configured to convey fluid is fixed radially above the stator and extends axially over the full length of the stator. The spray tube is connected to a supply duct for delivery of fluid, where the spray tube has at least two outlet openings that include an outlet opening in an area above the first winding head and in an area above the second winding head, so that the coolant flowing through can flow down at least in part onto the first winding head and the second winding head.

Abstract: A vehicle safety system for helping to protect a pedestrian in the event of a vehicle frontal collision with the pedestrian includes a plurality of crash sensors for sensing a vehicle frontal collision, an actuatable pedestrian protection device, a controller for controlling actuation of the pedestrian protection device, and at least one active sensor for determining the presence of a pedestrian in the path of the vehicle.

Abstract: A mounting aid device for mounting a valve slide in a housing bore of a valve housing of a slide valve includes a mounting slide arranged movably in a guide of a guide piece and protruding out of the guide of the guide piece on both sides. The guide piece includes a first stop, with which the guide piece is placeable coaxially to the housing bore when the guide piece contacts the valve housing at the first stop. The mounting slide configured to protrude into the housing bore until contact on the second end region of the valve slide and, by force-loading of the mounting slide under compression of the spring element, the valve slide is movable until the valve slide reaches the first end position.

Abstract: The invention relates to a chassis component with a structural part which comprises at least one strut section with an open cross-section shape, wherein in an end area of the strut section a first wall section and a second wall section are formed, the first wall section has a first joint-receiving opening and the second wall section has a second joint-receiving opening. The two joint-receiving openings are arranged opposite one another, and a joint housing of a joint is arranged in the two joint-receiving openings. In order to improve the arrangement of an additional component, in particular a sensor element, on the chassis component and make it simpler and/or less costly, the said additional component is fixed between the two wall sections and on the joint housing by means of a clamping fit and/or a press fit.

Abstract: An output stage for an inverter for driving an electrical machine includes a half-bridge containing a current valve embodied as a JFET. The current valve is configured to be controlled by a driver. The output stage comprises a cutout circuit for opening the current valve when the driver has no supply voltage, wherein the cutout circuit includes a capacitor and a diode, which are connected in series between a gate terminal and a source terminal of the current valve, an additional JFET for bypassing the diode, and a drive, which keeps a voltage between a gate terminal and a source terminal of the additional JFET small enough to close the additional JFET as long as a supply voltage of the driver is large enough.

Abstract: A parking lock shifting device has a flat cam mechanism with a rotatable cam element and an engagement element guided on the cam element and displaceable for shifting a parking lock. A transmission shifting device has a rotatable shift roller and at least one shift element which can be displaced by rotating the shift roller. The transmission shift device has such a parking lock shifting device, the cam element is non-rotatably connected to the shift drum and the engagement element forms a further shift element which can be shifted by rotating the shift drum. Also disclosed is a transmission with a parking lock shifting device of this type or a transmission shifting device of this type, and vehicle with a parking lock shifting device of this type, a transmission shifting device of this type or a transmission of this type.

Abstract: The present invention relates to a marine drive unit (1) comprising an upper bevel gear set (2) and a lower bevel gear set (3). The upper bevel gear set (2) is connected to the lower bevel gear set (3) by a drive shaft (4) which extends in vertical direction. A first oil pump (5) is arranged to supply oil to the upper bevel gear set (2) and a second oil pump (6) is arranged to feed a cooling oil circuit.

Abstract: A seal device (3) for a rotating shaft (1). The seal device has a shaft seal (4) and a collecting device (5) for the contactless removal of leakage, that penetrates through the shaft seal (4), from the shaft (1). Further, an electric machine has a rotor shaft (1) that can be driven in rotation and a seal device (3) of the type for sealing the rotor shaft (1) and, therefore, also an inside space of the electric machine. Additionally, a drive device for the electrical driving of a motor vehicle that has an electric machine of the type for the provision of a drive power of the drive device.